# L. Motyka - Jagiellonian University, Krakow, Poland

## Contact Details

NameL. Motyka |
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AffiliationJagiellonian University, Krakow, Poland |
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CityKraków |
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CountryPoland |
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## Pubs By Year |
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## External Links |
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## Pub CategoriesHigh Energy Physics - Phenomenology (50) High Energy Physics - Experiment (4) Nuclear Theory (2) Nuclear Experiment (1) |

## Publications Authored By L. Motyka

The forward Drell--Yan process in $pp$ scattering at the LHC at $\sqrt{S}=14$ TeV is considered. We analyze the Drell--Yan structure functions assuming the dominance of a Compton-like emission of a virtual photon from a fast quark scattering off the small $x$ gluons. The color dipole framework is applied to perform quantitatively the twist decomposition of all the Drell--Yan structure functions. Read More

**Authors:**D. de Florian

^{1}, C. Grojean

^{2}, F. Maltoni

^{3}, C. Mariotti

^{4}, A. Nikitenko

^{5}, M. Pieri

^{6}, P. Savard

^{7}, M. Schumacher

^{8}, R. Tanaka

^{9}, R. Aggleton

^{10}, M. Ahmad

^{11}, B. Allanach

^{12}, C. Anastasiou

^{13}, W. Astill

^{14}, S. Badger

^{15}, M. Badziak

^{16}, J. Baglio

^{17}, E. Bagnaschi

^{18}, A. Ballestrero

^{19}, A. Banfi

^{20}, D. Barducci

^{21}, M. Beckingham

^{22}, C. Becot

^{23}, G. Bélanger

^{24}, J. Bellm

^{25}, N. Belyaev

^{26}, F. U. Bernlochner

^{27}, C. Beskidt

^{28}, A. Biekötter

^{29}, F. Bishara

^{30}, W. Bizon

^{31}, N. E. Bomark

^{32}, M. Bonvini

^{33}, S. Borowka

^{34}, V. Bortolotto

^{35}, S. Boselli

^{36}, F. J. Botella

^{37}, R. Boughezal

^{38}, G. C. Branco

^{39}, J. Brehmer

^{40}, L. Brenner

^{41}, S. Bressler

^{42}, I. Brivio

^{43}, A. Broggio

^{44}, H. Brun

^{45}, G. Buchalla

^{46}, C. D. Burgard

^{47}, A. Calandri

^{48}, L. Caminada

^{49}, R. Caminal Armadans

^{50}, F. Campanario

^{51}, J. Campbell

^{52}, F. Caola

^{53}, C. M. Carloni Calame

^{54}, S. Carrazza

^{55}, A. Carvalho

^{56}, M. Casolino

^{57}, O. Cata

^{58}, A. Celis

^{59}, F. Cerutti

^{60}, N. Chanon

^{61}, M. Chen

^{62}, X. Chen

^{63}, B. Chokoufé Nejad

^{64}, N. Christensen

^{65}, M. Ciuchini

^{66}, R. Contino

^{67}, T. Corbett

^{68}, D. Curtin

^{69}, M. Dall'Osso

^{70}, A. David

^{71}, S. Dawson

^{72}, J. de Blas

^{73}, W. de Boer

^{74}, P. de Castro Manzano

^{75}, C. Degrande

^{76}, R. L. Delgado

^{77}, F. Demartin

^{78}, A. Denner

^{79}, B. Di Micco

^{80}, R. Di Nardo

^{81}, S. Dittmaier

^{82}, A. Dobado

^{83}, T. Dorigo

^{84}, F. A. Dreyer

^{85}, M. Dührssen

^{86}, C. Duhr

^{87}, F. Dulat

^{88}, K. Ecker

^{89}, K. Ellis

^{90}, U. Ellwanger

^{91}, C. Englert

^{92}, D. Espriu

^{93}, A. Falkowski

^{94}, L. Fayard

^{95}, R. Feger

^{96}, G. Ferrera

^{97}, A. Ferroglia

^{98}, N. Fidanza

^{99}, T. Figy

^{100}, M. Flechl

^{101}, D. Fontes

^{102}, S. Forte

^{103}, P. Francavilla

^{104}, E. Franco

^{105}, R. Frederix

^{106}, A. Freitas

^{107}, F. F. Freitas

^{108}, F. Frensch

^{109}, S. Frixione

^{110}, B. Fuks

^{111}, E. Furlan

^{112}, S. Gadatsch

^{113}, J. Gao

^{114}, Y. Gao

^{115}, M. V. Garzelli

^{116}, T. Gehrmann

^{117}, R. Gerosa

^{118}, M. Ghezzi

^{119}, D. Ghosh

^{120}, S. Gieseke

^{121}, D. Gillberg

^{122}, G. F. Giudice

^{123}, E. W. N. Glover

^{124}, F. Goertz

^{125}, D. Gonçalves

^{126}, J. Gonzalez-Fraile

^{127}, M. Gorbahn

^{128}, S. Gori

^{129}, C. A. Gottardo

^{130}, M. Gouzevitch

^{131}, P. Govoni

^{132}, D. Gray

^{133}, M. Grazzini

^{134}, N. Greiner

^{135}, A. Greljo

^{136}, J. Grigo

^{137}, A. V. Gritsan

^{138}, R. Gröber

^{139}, S. Guindon

^{140}, H. E. Haber

^{141}, C. Han

^{142}, T. Han

^{143}, R. Harlander

^{144}, M. A. Harrendorf

^{145}, H. B. Hartanto

^{146}, C. Hays

^{147}, S. Heinemeyer

^{148}, G. Heinrich

^{149}, M. Herrero

^{150}, F. Herzog

^{151}, B. Hespel

^{152}, V. Hirschi

^{153}, S. Hoeche

^{154}, S. Honeywell

^{155}, S. J. Huber

^{156}, C. Hugonie

^{157}, J. Huston

^{158}, A. Ilnicka

^{159}, G. Isidori

^{160}, B. Jäger

^{161}, M. Jaquier

^{162}, S. P. Jones

^{163}, A. Juste

^{164}, S. Kallweit

^{165}, A. Kaluza

^{166}, A. Kardos

^{167}, A. Karlberg

^{168}, Z. Kassabov

^{169}, N. Kauer

^{170}, D. I. Kazakov

^{171}, M. Kerner

^{172}, W. Kilian

^{173}, F. Kling

^{174}, K. Köneke

^{175}, R. Kogler

^{176}, R. Konoplich

^{177}, S. Kortner

^{178}, S. Kraml

^{179}, C. Krause

^{180}, F. Krauss

^{181}, M. Krawczyk

^{182}, A. Kulesza

^{183}, S. Kuttimalai

^{184}, R. Lane

^{185}, A. Lazopoulos

^{186}, G. Lee

^{187}, P. Lenzi

^{188}, I. M. Lewis

^{189}, Y. Li

^{190}, S. Liebler

^{191}, J. Lindert

^{192}, X. Liu

^{193}, Z. Liu

^{194}, F. J. Llanes-Estrada

^{195}, H. E. Logan

^{196}, D. Lopez-Val

^{197}, I. Low

^{198}, G. Luisoni

^{199}, P. Maierhöfer

^{200}, E. Maina

^{201}, B. Mansoulié

^{202}, H. Mantler

^{203}, M. Mantoani

^{204}, A. C. Marini

^{205}, V. I. Martinez Outschoorn

^{206}, S. Marzani

^{207}, D. Marzocca

^{208}, A. Massironi

^{209}, K. Mawatari

^{210}, J. Mazzitelli

^{211}, A. McCarn

^{212}, B. Mellado

^{213}, K. Melnikov

^{214}, S. B. Menari

^{215}, L. Merlo

^{216}, C. Meyer

^{217}, P. Milenovic

^{218}, K. Mimasu

^{219}, S. Mishima

^{220}, B. Mistlberger

^{221}, S. -O. Moch

^{222}, A. Mohammadi

^{223}, P. F. Monni

^{224}, G. Montagna

^{225}, M. Moreno Llácer

^{226}, N. Moretti

^{227}, S. Moretti

^{228}, L. Motyka

^{229}, A. Mück

^{230}, M. Mühlleitner

^{231}, S. Munir

^{232}, P. Musella

^{233}, P. Nadolsky

^{234}, D. Napoletano

^{235}, M. Nebot

^{236}, C. Neu

^{237}, M. Neubert

^{238}, R. Nevzorov

^{239}, O. Nicrosini

^{240}, J. Nielsen

^{241}, K. Nikolopoulos

^{242}, J. M. No

^{243}, C. O'Brien

^{244}, T. Ohl

^{245}, C. Oleari

^{246}, T. Orimoto

^{247}, D. Pagani

^{248}, C. E. Pandini

^{249}, A. Papaefstathiou

^{250}, A. S. Papanastasiou

^{251}, G. Passarino

^{252}, B. D. Pecjak

^{253}, M. Pelliccioni

^{254}, G. Perez

^{255}, L. Perrozzi

^{256}, F. Petriello

^{257}, G. Petrucciani

^{258}, E. Pianori

^{259}, F. Piccinini

^{260}, M. Pierini

^{261}, A. Pilkington

^{262}, S. Plätzer

^{263}, T. Plehn

^{264}, R. Podskubka

^{265}, C. T. Potter

^{266}, S. Pozzorini

^{267}, K. Prokofiev

^{268}, A. Pukhov

^{269}, I. Puljak

^{270}, M. Queitsch-Maitland

^{271}, J. Quevillon

^{272}, D. Rathlev

^{273}, M. Rauch

^{274}, E. Re

^{275}, M. N. Rebelo

^{276}, D. Rebuzzi

^{277}, L. Reina

^{278}, C. Reuschle

^{279}, J. Reuter

^{280}, M. Riembau

^{281}, F. Riva

^{282}, A. Rizzi

^{283}, T. Robens

^{284}, R. Röntsch

^{285}, J. Rojo

^{286}, J. C. Romão

^{287}, N. Rompotis

^{288}, J. Roskes

^{289}, R. Roth

^{290}, G. P. Salam

^{291}, R. Salerno

^{292}, R. Santos

^{293}, V. Sanz

^{294}, J. J. Sanz-Cillero

^{295}, H. Sargsyan

^{296}, U. Sarica

^{297}, P. Schichtel

^{298}, J. Schlenk

^{299}, T. Schmidt

^{300}, C. Schmitt

^{301}, M. Schönherr

^{302}, U. Schubert

^{303}, M. Schulze

^{304}, S. Sekula

^{305}, M. Sekulla

^{306}, E. Shabalina

^{307}, H. S. Shao

^{308}, J. Shelton

^{309}, C. H. Shepherd-Themistocleous

^{310}, S. Y. Shim

^{311}, F. Siegert

^{312}, A. Signer

^{313}, J. P. Silva

^{314}, L. Silvestrini

^{315}, M. Sjodahl

^{316}, P. Slavich

^{317}, M. Slawinska

^{318}, L. Soffi

^{319}, M. Spannowsky

^{320}, C. Speckner

^{321}, D. M. Sperka

^{322}, M. Spira

^{323}, O. Stål

^{324}, F. Staub

^{325}, T. Stebel

^{326}, T. Stefaniak

^{327}, M. Steinhauser

^{328}, I. W. Stewart

^{329}, M. J. Strassler

^{330}, J. Streicher

^{331}, D. M. Strom

^{332}, S. Su

^{333}, X. Sun

^{334}, F. J. Tackmann

^{335}, K. Tackmann

^{336}, A. M. Teixeira

^{337}, R. Teixeira de Lima

^{338}, V. Theeuwes

^{339}, R. Thorne

^{340}, D. Tommasini

^{341}, P. Torrielli

^{342}, M. Tosi

^{343}, F. Tramontano

^{344}, Z. Trócsányi

^{345}, M. Trott

^{346}, I. Tsinikos

^{347}, M. Ubiali

^{348}, P. Vanlaer

^{349}, W. Verkerke

^{350}, A. Vicini

^{351}, L. Viliani

^{352}, E. Vryonidou

^{353}, D. Wackeroth

^{354}, C. E. M. Wagner

^{355}, J. Wang

^{356}, S. Wayand

^{357}, G. Weiglein

^{358}, C. Weiss

^{359}, M. Wiesemann

^{360}, C. Williams

^{361}, J. Winter

^{362}, D. Winterbottom

^{363}, R. Wolf

^{364}, M. Xiao

^{365}, L. L. Yang

^{366}, R. Yohay

^{367}, S. P. Y. Yuen

^{368}, G. Zanderighi

^{369}, M. Zaro

^{370}, D. Zeppenfeld

^{371}, R. Ziegler

^{372}, T. Zirke

^{373}, J. Zupan

^{374}

**Affiliations:**

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^{10}The LHC Higgs Cross Section Working Group,

^{11}The LHC Higgs Cross Section Working Group,

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^{327}The LHC Higgs Cross Section Working Group,

^{328}The LHC Higgs Cross Section Working Group,

^{329}The LHC Higgs Cross Section Working Group,

^{330}The LHC Higgs Cross Section Working Group,

^{331}The LHC Higgs Cross Section Working Group,

^{332}The LHC Higgs Cross Section Working Group,

^{333}The LHC Higgs Cross Section Working Group,

^{334}The LHC Higgs Cross Section Working Group,

^{335}The LHC Higgs Cross Section Working Group,

^{336}The LHC Higgs Cross Section Working Group,

^{337}The LHC Higgs Cross Section Working Group,

^{338}The LHC Higgs Cross Section Working Group,

^{339}The LHC Higgs Cross Section Working Group,

^{340}The LHC Higgs Cross Section Working Group,

^{341}The LHC Higgs Cross Section Working Group,

^{342}The LHC Higgs Cross Section Working Group,

^{343}The LHC Higgs Cross Section Working Group,

^{344}The LHC Higgs Cross Section Working Group,

^{345}The LHC Higgs Cross Section Working Group,

^{346}The LHC Higgs Cross Section Working Group,

^{347}The LHC Higgs Cross Section Working Group,

^{348}The LHC Higgs Cross Section Working Group,

^{349}The LHC Higgs Cross Section Working Group,

^{350}The LHC Higgs Cross Section Working Group,

^{351}The LHC Higgs Cross Section Working Group,

^{352}The LHC Higgs Cross Section Working Group,

^{353}The LHC Higgs Cross Section Working Group,

^{354}The LHC Higgs Cross Section Working Group,

^{355}The LHC Higgs Cross Section Working Group,

^{356}The LHC Higgs Cross Section Working Group,

^{357}The LHC Higgs Cross Section Working Group,

^{358}The LHC Higgs Cross Section Working Group,

^{359}The LHC Higgs Cross Section Working Group,

^{360}The LHC Higgs Cross Section Working Group,

^{361}The LHC Higgs Cross Section Working Group,

^{362}The LHC Higgs Cross Section Working Group,

^{363}The LHC Higgs Cross Section Working Group,

^{364}The LHC Higgs Cross Section Working Group,

^{365}The LHC Higgs Cross Section Working Group,

^{366}The LHC Higgs Cross Section Working Group,

^{367}The LHC Higgs Cross Section Working Group,

^{368}The LHC Higgs Cross Section Working Group,

^{369}The LHC Higgs Cross Section Working Group,

^{370}The LHC Higgs Cross Section Working Group,

^{371}The LHC Higgs Cross Section Working Group,

^{372}The LHC Higgs Cross Section Working Group,

^{373}The LHC Higgs Cross Section Working Group,

^{374}The LHC Higgs Cross Section Working Group

This Report summarizes the results of the activities of the LHC Higgs Cross Section Working Group in the period 2014-2016. The main goal of the working group was to present the state-of-the-art of Higgs physics at the LHC, integrating all new results that have appeared in the last few years. The first part compiles the most up-to-date predictions of Higgs boson production cross sections and decay branching ratios, parton distribution functions, and off-shell Higgs boson production and interference effects. Read More

The Lam-Tung relation breaking coefficient $A_{\mathrm{LT}} = A_0 - A_2$ in the Drell-Yan dilepton angular distributions in the $Z^0$ boson mass region at the LHC is analyzed in the $k_T$-factorization approach. This observable was recently measured with high precision by ATLAS collaboration. Within the $k_T$-factorization approach we perform an approximate NNLO calculation of the off-shell parton hard matrix elements in which we include the leading contributions of valence quarks and off-shell gluons: the well known $q_{\mathrm{val}} g^* \to qZ^0$ channel and a new $g^*g^* \to q\bar q Z^0$ channel. Read More

In the following we present our results on resummation of invariant mass threshold corrections for the $2 \to 3$ type hadronic production processes in the Mellin moment space formalism. This method is applied to the associated Higgs boson production process $pp \to t \bar{t} H$ at the LHC. The results for the total cross section, the differential distribution with respect to the invariant mass and their uncertainties are presented. Read More

We present a twist expansion of differential cross-sections of the forward Drell-Yan process at the high energies. The expansion of all invariant form-factors is performed assuming GBW saturation model and the saturation scale plays the role of the hadronic scale of OPE. Some expilicit predictions for LHC experiments are given. Read More

**Authors:**A. Bacchetta, J. Blümlein, O. Behnke, J. Dainton, M. Diehl, F. Hautmann, A. Geiser, H. Jung, U. Karshon, D. Kang, P. Kroll, C. Lee, S. Levonian, A. Levy, E. Lohrmann, S. Moch, L. Motyka, R. McNulty, V. Myronenko, E. R. Nocera, S. Plätzer, A. Rostomyan, M. Ruspa, M. Sauter, G. Schnell, S. Schmitt, H. Spiesberger, I. Stewart, O. Turkot, A. Valkárová, K. Wichmann, M. Wing, A. F. Żarnecki

Recent highlights from the HERA experiments, Hermes, H1 and ZEUS, are reviewed and ideas for future analyses to fully exploit this unique data set are proposed. This document is a summary of a workshop on future physics with HERA data held at DESY, Hamburg at the end of 2014. All areas of HERA physics are covered and contributions from both experimentalists and theorists are included. Read More

We perform resummation of soft gluon corrections to the total cross section for the process $pp \to t\bar{t}H$. The resummation is carried out at next-to-leading-logarithmic (NLL) accuracy using the Mellin space technique, extending its application to the class of $2 \to 3$ processes. We present an analytical result for the soft anomalous dimension for a hadronic production of two coloured massive particles in association with a colour singlet. Read More

**Authors:**R. Astalos, S. Baranov, P. Bartalini, I. Belyaev, Ch. Bierlich, B. Blok, A. Buckley, F. A. Ceccopieri, I. Cherednikov, J. R. Christiansen, D. Ciangottini, M. Deak, B. Ducloue, R. Field, J. R. Gaunt, K. Golec-Biernat, L. Goerlich, A. Grebenyuk, O. Gueta, P. Gunnellini, I. Helenius, H. Jung, D. Kar, O. Kepka, M. Klusek-Gawenda, A. Knutsson, P. Kotko, M. W. Krasny, K. Kutak, E. Lewandowska, G. Lykasov, R. Maciula, A. M. Moraes, T. Martin, G. Mitsuka, L. Motyka, M. Myska, J. Otwinowski, T. Pierog, V. Pleskot, M. Rinaldi, W. Schafer, A. Siodmok, T. Sjostrand, A. Snigirev, A. Stasto, R. Staszewski, T. Stebel, M. Strikman, A. Szczurek, D. Treleani, M. Trzebinski, H. van Haevermaet, A. van Hameren, P. van Mechelen, W. Waalewijn, W. Y. Wang

Multiple Partonic Interactions are often crucial for interpreting results obtained at the Large Hadron Collider (LHC). The quest for a sound understanding of the dynamics behind MPI - particularly at this time when the LHC is due to start its "Run II" operations - has focused the aim of this workshop. MPI@LHC2014 concentrated mainly on the phenomenology of LHC measurements whilst keeping in perspective those results obtained at previous hadron colliders. Read More

A contribution to $J/\psi$ hadroproduction is analyzed in which the meson production is mediated by three-gluon partonic state, with two gluons coming from the target and one gluon from the projectile. This mechanism involves double gluon density in one of the protons, hence this contribution enters at a non-leading twist. It is, however, relevant due to an enhancement factor coming from large double gluon density at small~$x$. Read More

Forward Drell-Yan process at the LHC probes the proton structure at very small Bjorken-$x$ and moderate hard scales. In this kinematical domain higher twist effects may be significant and introduce sizeable corrections to the standard leading twist description. We study the forward Drell-Yan process beyond the leading twist approximation within the color dipole model framework that incorporates multiple scattering effects. Read More

Forward Drell-Yan process at the LHC is a sensitive tool for investigating higher twist effects in QCD. The expansion of all Drell-Yan structure functions is performed assuming GBW saturation model and the saturation scale plays the role of the hadronic scale of OPE. We show that the Lam-Tung relation is broken at twist 4. Read More

An analysis of twist composition of Balitsky-Kovchegov (BK) amplitude is performed in the double logarithmic limit. In this limit the BK evolution of color dipole -- proton scattering is equivalent to BFKL evolution which follows from vanishing of the Bartels vertex in the collinear limit. We perform twist decomposition of the BFKL/BK amplitude for proton structure functions and find compact analytic expressions that provide accurate approximations for higher twist amplitudes. Read More

The three-gluon contribution to $J/\psi$ hadroproduction is calculated within perturbative QCD in the $k_T$ factorization framework. This mechanism involves double gluon density and enters at a non-leading twist, but it is enhanced at large energies due to large double gluon density at small $x$. We obtain results for differential $p_T$-dependent cross-sections for all $J/\psi$ polarisations. Read More

**Affiliations:**

^{1}Jagiellonian University, Krakow, Poland,

^{2}Jagiellonian University, Krakow, Poland

**Category:**High Energy Physics - Phenomenology

We consider a contribution to J/psi hadroproduction in which the meson production is mediated by three-gluon partonic state, with two gluons coming from the target and one gluon from the projectile. This mechanism involves double gluon density and thus it enters at a non-leading twist, but it is enhanced at large energies due to large double gluon density at small x. The three-gluon contribution to J/psi hadroproduction is calculated within perturbative QCD in the k_T factorization framework, and it is found to provide a significant correction to the standard leading twist cross-section at the energies of the Tevatron or the LHC. Read More

HERA data on diffractive DIS show deviations from twist 2 DGLAP predictions below $Q^2\sim 5$ GeV$^2$ at low pomeron $\xi$, which may reach up to 100%. These deviations are consistent with higher twists effects extracted from the saturation model. It is a first direct evidence for the higher twists in DIS. Read More

We study a twist decomposition of diffractive structure functions in the diffractive deep inelastic scattering at HERA. At low $Q^2$ and at large energy the data exhibit a strong deviation from the twist-2 NLO DGLAP description. It is found that this deviation in consistent with higher twist effects. Read More

We study a twist decomposition of diffractive structure functions in the diffractive deep inelastic scattering (DDIS) at HERA. At low Q2 and at large energy the data exhibit a strong excess, up to about 100%, above the twist 2 NLO DGLAP description. The excess in consistent with higher twist effects. Read More

**Authors:**D. Boer, M. Diehl, R. Milner, R. Venugopalan, W. Vogelsang, A. Accardi, E. Aschenauer, M. Burkardt, R. Ent, V. Guzey, D. Hasch, K. Kumar, M. A. C. Lamont, Y. Li, W. J. Marciano, C. Marquet, F. Sabatie, M. Stratmann, F. Yuan, S. Abeyratne, S. Ahmed, C. Aidala, S. Alekhin, M. Anselmino, H. Avakian, A. Bacchetta, J. Bartels, H. BC, J. Beebe-Wang, S. Belomestnykh, I. Ben-Zvi, G. Beuf, J. Blumlein, M . Blaskiewicz, A. Bogacz, S. J. Brodsky, T. Burton, R. Calaga, X. Chang, I. O. Cherednikov, P. Chevtsov, G. A. Chirilli, C. Ciofi degli Atti, I. C. Cloet, A. Cooper-Sarkar, R. Debbe, Ya. Derbenev, A. Deshpande, F. Dominguez, A. Dumitru, R. Dupre, B. Erdelyi, C. Faroughy, S. Fazio, A. Fedotov, J. R. Forshaw, R. Geraud, K. Gallmeister, L. Gamberg, J. -H. Gao, D. Gassner, F. Gelis, G. P. Gilfoyle, G. Goldstein, K. Golec-Biernat, V. P. Goncalves, M. Gonderinger, M. Guzzi, P. Hagler, H. Hahn, L. Hammons, Y. Hao, P. He, T. Horn, W. A. Horowitz, M. Huang, A. Hutton, B. Jager, W. Jackson, A. Jain, E. C. Johnson, Z. -B. Kang, L. P. Kaptari, D. Kayran, J. Kewisch, Y. Koike, A. Kondratenko, B. Z. Kopeliovich, Y. V. Kovchegov, G. Krafft, P. Kroll, S. Kumano, K. Kumericki, T. Lappi, T. Lautenschlager, R. Li, Z. -T. Liang, V. N. Litvinenko, S. Liuti, Y. Luo, D. Muller, G. Mahler, A. Majumder, S. Manikonda, F. Marhauser, G. McIntyre, M. Meskauskas, W. Meng, A. Metz, C. B. Mezzetti, G. A. Miller, M. Minty, S. -O. Moch, V. Morozov, U. Mosel, L. Motyka, H. Moutarde, P. J. Mulders, B. Musch, P. Nadel-Turonski, P. Nadolsky, F. Olness, P. N. Ostrumov, B. Parker, B. Pasquini, K. Passek-Kumericki, A. Pikin, F. Pilat, B. Pire, H. Pirner, C. Pisano, E. Pozdeyev, A. Prokudin, V. Ptitsyn, X. Qian, J. -W. Qiu, M. Radici, A. Radyushkin, T. Rao, R. Rimmer, F. Ringer, S. Riordan, T. Rogers, J. Rojo, T. Roser, R. Sandapen, R. Sassot, T. Satogata, H. Sayed, A. Schafer, G. Schnell, P. Schweitzer, B. Sheehy, J. Skaritka, G. Soyez, M. Spata, H. Spiesberger, A. M. Stasto, N. G. Stefanis, M. Strikman, M. Sullivan, L. Szymanowski, K. Tanaka, S. Taneja, S. Tepikian, B. Terzic, Y. Than, T. Toll, D. Trbojevic, E. Tsentalovich, N. Tsoupas, K. Tuchin, J. Tuozzolo, T. Ullrich, A. Vossen, S. Wallon, G. Wang, H. Wang, X. -N. Wang, S. Webb, C. Weiss, Q. Wu, B. -W. Xiao, W. Xu, B. Yunn, A. Zelenski, Y. Zhang, J. Zhou, P. Zurita

This report is based on a ten-week program on "Gluons and the quark sea at high-energies", which took place at the Institute for Nuclear Theory in Seattle in Fall 2010. The principal aim of the program was to develop and sharpen the science case for an Electron-Ion Collider (EIC), a facility that will be able to collide electrons and positrons with polarized protons and with light to heavy nuclei at high energies, offering unprecedented possibilities for in-depth studies of quantum chromodynamics. This report is organized around four major themes: i) the spin and flavor structure of the proton, ii) three-dimensional structure of nucleons and nuclei in momentum and configuration space, iii) QCD matter in nuclei, and iv) Electroweak physics and the search for physics beyond the Standard Model. Read More

We review the theoretical status of squark and gluino hadroproduction and provide numerical predictions for all squark and gluino pair-production processes at the Tevatron and at the LHC, with a particular emphasis on proton-proton collisions at 7 TeV. Our predictions include next-to-leading order supersymmetric QCD corrections and the resummation of soft gluon emission at next-to-leading-logarithmic accuracy. We discuss the impact of the higher-order corrections on total cross sections, and provide an estimate of the theoretical uncertainty due to scale variation and the parton distribution functions. Read More

We report on the study of soft gluon effects in the production of squarks and gluinos at hadron colliders. Close to production threshold, the emission of soft gluon results in the appearence of large logarithmic corrections in the theoretical expressions. In order to resum these corrections at next-to-leading-logarithmic accuracy appropriate one-loop anomalous dimensions have to be calculated. Read More

Higher twist effects in the deeply inelastic scattering are studied. We start with a short review of the theoretical results on higher twists in QCD. Within the saturation model we perform a twist analysis of the nucleon structure functions FT and FL at small value of the Bjorken variable x. Read More

We study the effect of soft gluon emission in the hadroproduction of gluino-gluino and squark-antisquark pairs at the next-to-leading logarithmic (NLL) accuracy within the framework of the minimal supersymmetric model. We present the calculation of the one-loop soft anomalous dimension matrices controlling the colour evolution of the underlying hard-scattering processes. The numerical results for resummed cross sections for proton-proton collisions at the Large Hadron Collider are discussed in detail. Read More

**Authors:**H. Jung

^{1}, A. De Roeck

^{2}, Z. J. Ajaltouni

^{3}, S. Albino

^{4}, G. Altarelli

^{5}, F. Ambroglini

^{6}, J. Anderson

^{7}, G. Antchev

^{8}, M. Arneodo

^{9}, P. Aspell

^{10}, V. Avati

^{11}, M. Bahr

^{12}, A. Bacchetta

^{13}, M. G. Bagliesi

^{14}, R. D. Ball

^{15}, A. Banfi

^{16}, S. Baranov

^{17}, P. Bartalini

^{18}, J. Bartels

^{19}, F. Bechtel

^{20}, V. Berardi

^{21}, M. Berretti

^{22}, G. Beuf

^{23}, M. Biasini

^{24}, I. Bierenbaum

^{25}, J. Blumlein

^{26}, R. E. Blair

^{27}, C. Bombonati

^{28}, M. Boonekamp

^{29}, U. Bottigli

^{30}, S. Boutle

^{31}, M. Bozzo

^{32}, E. Brucken

^{33}, J. Bracinik

^{34}, A. Bruni

^{35}, G. E. Bruno

^{36}, A. Buckley

^{37}, A. Bunyatyan

^{38}, H. Burkhardt

^{39}, P. Bussey

^{40}, A. Buzzo

^{41}, M. Cacciari

^{42}, F. Cafagna

^{43}, M. Calicchio

^{44}, F. Caola

^{45}, M. G. Catanesi

^{46}, P. L. Catastini

^{47}, R. Cecchi

^{48}, F. A. Ceccopieri

^{49}, S. Cerci

^{50}, S. Chekanov

^{51}, R. Chierici

^{52}, M. Ciafaloni

^{53}, M. A. Ciocci

^{54}, V. Coco

^{55}, D. Colferai

^{56}, A. Cooper-Sarkar

^{57}, G. Corcella

^{58}, M. Czakon

^{59}, A. Dainese

^{60}, M. Dasgupta

^{61}, M. Deak

^{62}, M. Deile

^{63}, P. A. Delsart

^{64}, L. Del Debbio

^{65}, A. de Roeck

^{66}, C. Diaconu

^{67}, M. Diehl

^{68}, E. Dimovasili

^{69}, M. Dittmar

^{70}, I. M. Dremin

^{71}, K. Eggert

^{72}, R. Engel

^{73}, V. Eremin

^{74}, S. Erhan

^{75}, C. Ewerz

^{76}, L. Fano

^{77}, J. Feltesse

^{78}, G. Ferrera

^{79}, F. Ferro

^{80}, R. Field

^{81}, S. Forte

^{82}, F. Garcia

^{83}, A. Geiser

^{84}, F. Gelis

^{85}, S. Giani

^{86}, S. Gieseke

^{87}, M. A. Gigg

^{88}, A. Glazov

^{89}, K. Golec-Biernat

^{90}, K. Goulianos

^{91}, J. Grebenyuk

^{92}, V. Greco

^{93}, D. Grellscheid

^{94}, G. Grindhammer

^{95}, M. Grothe

^{96}, A. Guffanti

^{97}, C. Gwenlan

^{98}, V. Halyo

^{99}, K. Hamilton

^{100}, F. Hautmann

^{101}, J. Heino

^{102}, G. Heinrich

^{103}, T. Hilden

^{104}, K. Hiller

^{105}, J. Hollar

^{106}, X. Janssen

^{107}, S. Joseph

^{108}, A. W. Jung

^{109}, H. Jung

^{110}, V. Juranek, J. Kaspar, O. Kepka, V. A. Khoze, Ch. Kiesling, M. Klasen, S. Klein, B. A. Kniehl, A. Knutsson, J. Kopal, G. Kramer, F. Krauss, V. Kundrat, K. Kurvinen, K. Kutak, L. Lonnblad, S. Lami, G. Latino, J. I. Latorre, O. Latunde-Dada, R. Lauhakangas, V. Lendermann, P. Lenzi, G. Li, A. Likhoded, A. Lipatov, E. Lippmaa, M. Lokajicek, M. Lo Vetere, F. Lucas Rodriguez, G. Luisoni, E. Lytken, K. Muller, M. Macri, G. Magazzu, A. Majhi, S. Majhi, P. Marage, L. Marti, A. D. Martin, M. Meucci, D. A. Milstead, S. Minutoli, A. Nischke, A. Moares, S. Moch, L. Motyka, T. Namsoo, P. Newman, H. Niewiadomski, C. Nockles, E. Noschis, G. Notarnicola, J. Nystrand, E. Oliveri, F. Oljemark, K. Osterberg, R. Orava, M. Oriunno, S. Osman, S. Ostapchenko, P. Palazzi, E. Pedreschi, A. V. Pereira, H. Perrey, J. Petajajarvi, T. Petersen, A. Piccione, T. Pierog, J. L. Pinfold, O. I. Piskounova, S. Platzer, M. Quinto, Z. Rurikova, E. Radermacher, V. Radescu, E. Radicioni, F. Ravotti, G. Rella, P. Richardson, E. Robutti, G. Rodrigo, E. Rodrigues, M. Rogal, T. C. Rogers, J. Rojo, P. Roloff, L. Ropelewski, C. Rosemann, Ch. Royon, G. Ruggiero, A. Rummel, M. Ruspa, M. G. Ryskin, D. Salek, W. Slominski, H. Saarikko, A. Sabio Vera, T. Sako, G. P. Salam, V. A. Saleev, C. Sander, G. Sanguinetti, A. Santroni, Th. Schorner-Sadenius, R. Schicker, I. Schienbein, W. B. Schmidke, F. Schwennsen, A. Scribano, G. Sette, M. H. Seymour, A. Sherstnev, T. Sjostrand, W. Snoeys, G. Somogyi, L. Sonnenschein, G. Soyez, H. Spiesberger, F. Spinella, P. Squillacioti, A. M. Stasto, A. Starodumov, H. Stenzel, Ph. Stephens, A. Ster, D. Stocco, M. Strikman, C. Taylor, T. Teubner, R. S. Thorne, Z. Trocsanyi, M. Treccani, D. Treleani, L. Trentadue, A. Trummal, J. Tully, W. K. Tung, M. Turcato, N. Turini, M. Ubiali, A. Valkarova, A. van Hameren, P. Van Mechelen, J. A. M. Vermaseren, A. Vogt, B. F. L. Ward, G. Watt, B. R. Webber, Ch. Weiss, Ch. White, J. Whitmore, R. Wolf, J. Wu, A. Yagues-Molina, S. A. Yost, G. Zanderighi, N. Zotov, M. zur Nedden

**Affiliations:**

^{1}DESY, U. Antwerp,

^{2}CERN, U. Antwerp,

^{3}DESY, U. Antwerp,

^{4}DESY, U. Antwerp,

^{5}DESY, U. Antwerp,

^{6}DESY, U. Antwerp,

^{7}DESY, U. Antwerp,

^{8}DESY, U. Antwerp,

^{9}DESY, U. Antwerp,

^{10}DESY, U. Antwerp,

^{11}DESY, U. Antwerp,

^{12}DESY, U. Antwerp,

^{13}DESY, U. Antwerp,

^{14}DESY, U. Antwerp,

^{15}DESY, U. Antwerp,

^{16}DESY, U. Antwerp,

^{17}DESY, U. Antwerp,

^{18}DESY, U. Antwerp,

^{19}DESY, U. Antwerp,

^{20}DESY, U. Antwerp,

^{21}DESY, U. Antwerp,

^{22}DESY, U. Antwerp,

^{23}DESY, U. Antwerp,

^{24}DESY, U. Antwerp,

^{25}DESY, U. Antwerp,

^{26}DESY, U. Antwerp,

^{27}DESY, U. Antwerp,

^{28}DESY, U. Antwerp,

^{29}DESY, U. Antwerp,

^{30}DESY, U. Antwerp,

^{31}DESY, U. Antwerp,

^{32}DESY, U. Antwerp,

^{33}DESY, U. Antwerp,

^{34}DESY, U. Antwerp,

^{35}DESY, U. Antwerp,

^{36}DESY, U. Antwerp,

^{37}DESY, U. Antwerp,

^{38}DESY, U. Antwerp,

^{39}DESY, U. Antwerp,

^{40}DESY, U. Antwerp,

^{41}DESY, U. Antwerp,

^{42}DESY, U. Antwerp,

^{43}DESY, U. Antwerp,

^{44}DESY, U. Antwerp,

^{45}DESY, U. Antwerp,

^{46}DESY, U. Antwerp,

^{47}DESY, U. Antwerp,

^{48}DESY, U. Antwerp,

^{49}DESY, U. Antwerp,

^{50}DESY, U. Antwerp,

^{51}DESY, U. Antwerp,

^{52}DESY, U. Antwerp,

^{53}DESY, U. Antwerp,

^{54}DESY, U. Antwerp,

^{55}DESY, U. Antwerp,

^{56}DESY, U. Antwerp,

^{57}DESY, U. Antwerp,

^{58}DESY, U. Antwerp,

^{59}DESY, U. Antwerp,

^{60}DESY, U. Antwerp,

^{61}DESY, U. Antwerp,

^{62}DESY, U. Antwerp,

^{63}DESY, U. Antwerp,

^{64}DESY, U. Antwerp,

^{65}DESY, U. Antwerp,

^{66}DESY, U. Antwerp,

^{67}DESY, U. Antwerp,

^{68}DESY, U. Antwerp,

^{69}DESY, U. Antwerp,

^{70}DESY, U. Antwerp,

^{71}DESY, U. Antwerp,

^{72}DESY, U. Antwerp,

^{73}DESY, U. Antwerp,

^{74}DESY, U. Antwerp,

^{75}DESY, U. Antwerp,

^{76}DESY, U. Antwerp,

^{77}DESY, U. Antwerp,

^{78}DESY, U. Antwerp,

^{79}DESY, U. Antwerp,

^{80}DESY, U. Antwerp,

^{81}DESY, U. Antwerp,

^{82}DESY, U. Antwerp,

^{83}DESY, U. Antwerp,

^{84}DESY, U. Antwerp,

^{85}DESY, U. Antwerp,

^{86}DESY, U. Antwerp,

^{87}DESY, U. Antwerp,

^{88}DESY, U. Antwerp,

^{89}DESY, U. Antwerp,

^{90}DESY, U. Antwerp,

^{91}DESY, U. Antwerp,

^{92}DESY, U. Antwerp,

^{93}DESY, U. Antwerp,

^{94}DESY, U. Antwerp,

^{95}DESY, U. Antwerp,

^{96}DESY, U. Antwerp,

^{97}DESY, U. Antwerp,

^{98}DESY, U. Antwerp,

^{99}DESY, U. Antwerp,

^{100}DESY, U. Antwerp,

^{101}DESY, U. Antwerp,

^{102}DESY, U. Antwerp,

^{103}DESY, U. Antwerp,

^{104}DESY, U. Antwerp,

^{105}DESY, U. Antwerp,

^{106}DESY, U. Antwerp,

^{107}DESY, U. Antwerp,

^{108}DESY, U. Antwerp,

^{109}DESY, U. Antwerp,

^{110}DESY, U. Antwerp

**Category:**High Energy Physics - Phenomenology

2nd workshop on the implications of HERA for LHC physics. Working groups: Parton Density Functions Multi-jet final states and energy flows Heavy quarks (charm and beauty) Diffraction Cosmic Rays Monte Carlos and Tools Read More

The problem of kinematic effects in the gluon and color dipole cascades is addressed in the large N_c limit of SU(N_c) Yang--Mills theory. We investigate the tree level multi-gluon components of the gluon light cone wave functions in the light cone gauge keeping the exact kinematics of the gluon emissions. We focus on the components with all helicities identical to the helicity of the incoming gluon. Read More

**Authors:**M. Dittmar

^{1}, S. Forte

^{2}, A. Glazov

^{3}, S. Moch

^{4}, G. Altarelli, J. Anderson, R. D. Ball, G. Beuf, M. Boonekamp, H. Burkhardt, F. Caola, M. Ciafaloni, D. Colferai, A. Cooper-Sarkar, A. de Roeck, L. Del Debbio, J. Feltesse, F. Gelis, J. Grebenyuk, A. Guffanti, V. Halyo, J. I. Latorre, V. Lendermann, Gang Li, L. Motyka, T. Petersen, A. Piccione, V. Radescu, M. Rogal, J. Rojo, C. Royon, G. P. Salam, D. Salek, A. M. Stasto, R. S. Thorne, M. Ubiali, J. A. M. Vermaseren, A. Vogt, G. Watt, C. D. White

**Affiliations:**

^{1}convenors,

^{2}convenors,

^{3}convenors,

^{4}convenors

**Category:**High Energy Physics - Phenomenology

We provide an assessment of the state of the art in various issues related to experimental measurements, phenomenological methods and theoretical results relevant for the determination of parton distribution functions (PDFs) and their uncertainties, with the specific aim of providing benchmarks of different existing approaches and results in view of their application to physics at the LHC. We discuss higher order corrections, we review and compare different approaches to small x resummation, and we assess the possible relevance of parton saturation in the determination of PDFS at HERA and its possible study in LHC processes. We provide various benchmarks of PDF fits, with the specific aim of studying issues of error propagation, non-gaussian uncertainties, choice of functional forms of PDFs, and combination of data from different experiments and different processes. Read More

In this contribution we briefly review the current status of the dipole models and parton saturation on the basis of results presented at the HERA-LHC workshops in the years 2006-2008. The problem of foundations of the dipole models is addressed within the QCD formalism. Some limitations of the models and open problems are pointed out. Read More

**Authors:**Hannes Jung, Albert De Roeck, Jochen Bartels, Olaf Behnke, Johannes Blumlein, Stanley Brodsky, Amanda Cooper-Sarkar, Michal Deak, Robin Devenish, Markus Diehl, Thomas Gehrmann, Guenter Grindhammer, Gosta Gustafson, Valery Khoze, Albert Knutsson, Max Klein, Frank Krauss, Krzysztof Kutak, Eric Laenen, Leif Lonnblad, Leszek Motyka, Paul R. Newman, Fred Olness, Daniel Pitzl, Marta Ruspa, Agustin Sabio Vera, Gavin P. Salam, Thomas Schorner-Sadenius, Mark Strikman

**Category:**High Energy Physics - Phenomenology

More than 100 people participated in a discussion session at the DIS08 workshop on the topic What HERA may provide. A summary of the discussion with a structured outlook and list of desirable measurements and theory calculations is given. Read More

In this talk we report on recent calculation of high energy baryon scattering amplitudes in QCD. Elastic baryon impact factors for two, three and four gluons are presented and their energy evolution is described that incorporates unitarity corrections. We find that the baryon couples directly to the BFKL Pomeron, to the BKP odderon and to a new state, a three-gluon BKP Pomeron. Read More

In this talk estimates are presented of the odderon contributions to the exclusive J/psi and Upsilon production cross-sections at the Tevatron and the Large Hadron Collider. The obtained cross-sections are compared to cross-sections of the dominant background subprocesses mediated by the photon exchange. Possible experimental cuts are proposed that reduce the photon background. Read More

We study the effect of soft gluon emission in the hadroproduction of squark-antisquark and gluino-gluino pairs at the next-to-leading logarithmic (NLL) accuracy within the framework of the minimal supersymmetric model. The one-loop soft anomalous dimension matrices controlling the colour evolution of the underlying hard-scattering processes are calculated. We present the resummed total cross sections and show numerical results for proton-proton collisions at 14 TeV. Read More

We provide predictions for the rapidity distributions of exclusive photoproduced J/psi and Upsilon mesons, and Z^0 bosons, at the Tevatron and LHC. We use the equivalent-photon approximation with the photon-proton cross sections given by the impact parameter dependent dipole saturation model, which has already been shown to give a good description of a wide variety of HERA data. We derive the quark-antiquark light-cone wave functions of timelike neutral electroweak bosons. Read More

The scattering of a baryon consisting of three massive quarks is investigated in the high energy limit of perturbative QCD. A model of a relativistic proton-like wave function, dependent on valence quark longitudinal and transverse momenta and on quark helicities, is proposed, and we derive the baryon impact factors for two, three and four t-channel gluons. We find that the baryonic impact factor can be written as a sum of three pieces: in the first one a subsystem consisting of two of the three quarks behaves very much like the quark-antiquark pair in gamma* scattering, whereas the third quark acts as a spectator. Read More

We study pp and p\bar p collisions which lead to the exclusive production of J/psi or Upsilon from the pomeron-odderon and the pomeron-photon fusion. We calculate scattering amplitudes of these processes in the lowest order approximation and in the framework of k_T factorization. We present estimates of cross sections for the kinematic conditions of the Tevatron and of the LHC. Read More

The Reggeon field theory in zero transverse dimensions is investigated. Two versions of the theory are considered: one that allows at most triple pomeron interactions and the other that embodies an additional 2-->2 quartic Reggeon coupling. The behavior of the scattering amplitude at asymptotic rapidities is obtained in both cases. Read More

We present a simultaneous analysis, within an impact parameter dependent saturated dipole model, of exclusive diffractive vector meson (J/psi, phi and rho) production, deeply virtual Compton scattering and the total gamma* p cross section data measured at HERA. Various cross sections measured as a function of the kinematic variables Q^2, W and t are well described, with little sensitivity to the details of the vector meson wave functions. We determine the properties of the gluon density in the proton in both longitudinal and transverse dimensions, including the impact parameter dependent saturation scale. Read More

Effective field theory of BFKL pomerons interacting by QCD triple pomeron vertices is investigated. Classical equations of motion for the effective pomeron fields are presented being a minimal extension of the Balitsky-Kovchegov equation that incorporates both merging and splitting of the pomerons and that is self-dual. The equations are solved for symmetric boundary conditions. Read More

**Authors:**J. Baines, S. P. Baranov, O. Behnke, J. Bracinik, M. Cacciari, M. Corradi, A. Dainese, S. Diglio, K. J. Eskola, T. O. Eynck, A. Geiser, G. Grindhammer, H. Jung, B. A. Kniehl, V. J. Kolhinen, S. Kretzer, K. Kutak, E. Laenen, Th. Lagouri, A. V. Lipatov, F. Maltoni, A. D. Martin, A. Meyer, A. Morsch, L. Motyka, K. Peters, F. Petrucci, O. I. Piskounova, R. Ranieri, H. Ruiz, M. G. Ryskin, I. Schienbein, J. Smith, M. Smizanska, H. Spiesberger, A. Tonazzo, U. Uwer, M. Verducci, R. Vogt, C. Weiser, N. P. Zotov

**Category:**High Energy Physics - Phenomenology

The present status of the heavy-quark production theory is critically reviewed in the first contribution. The second contribution summarises the present heavy flavour data from HERA and gives an outlook of what can be expected from HERA-II. The potential of the LHC experiments for charm and beauty physics is reviewed in the 3rd contribution. Read More

We examine, as a correction to the central exclusive Higgs boson production in $pp$ collisions at the LHC, the rescattering of gluonic ladders off the proton. As usual, at the lowest order the hard part of this process can be described as a fusion of two hard gluonic ladders. We calculate corrections to this hard amplitude which are due to rescattering of these ladders. Read More

**Authors:**S. Alekhin, G. Altarelli, N. Amapane, J. Andersen, V. Andreev, M. Arneodo, V. Avati, J. Baines, R. D. Ball, A. Banfi, S. P. Baranov, J. Bartels, O. Behnke, R. Bellan, J. Blumlein, H. Bottcher, S. Bolognesi, M. Boonekamp, D. Bourilkov, J. Bracinik, A. Bruni, G. Bruni, A. Buckley, A. Bunyatyan, C. M. Buttar, J. M. Butterworth, S. Butterworth, M. Cacciari, T. Carli, G. Cerminara, S. Chekanov, M. Ciafaloni, D. Colferai, J. Collins, A. Cooper-Sarkar, G. Corcella, M. Corradi, B. E. Cox, R. Croft, Z. Czyczula, A. Dainese, M. Dasgupta, G. Davatz, L. Del Debbio, Y. Delenda, A. De Roeck, M. Diehl, S. Diglio, G. Dissertori, M. Dittmar, J. Ellis, K. J. Eskola, T. O. Eynck, J. Feltesse, F. Ferro, R. D. Field, J. Forshaw, S. Forte, A. Geiser, S. Gieseke, A. Glazov, T. Gleisberg, P. Golonka, E. Gotsman, G. Grindhammer, M. Grothe, C. Group, M. Groys, A. Guffanti, G. Gustafson, C. Gwenlan, S. Hoche, C. Hogg, J. Huston, G. Iacobucci, G. Ingelman, S. Jadach, H. Jung, J. Kalliopuska, M. Kapishin, B. Kersevan, V. Khoze, M. Klasen, M. Klein, B. A. Kniehl, V. J. Kolhinen, H. Kowalski, G. Kramer, F. Krauss, S. Kretzer, K. Kutak, J. W. Lamsa, L. Lonnblad, T. Lastovicka, G. Lastovicka-Medin, E. Laenen, Th. Lagouri, J. I. Latorre, N. Lavesson, V. Lendermann, E. Levin, A. Levy, A. V. Lipatov, M. Lublinsky, L. Lytkin, T. Maki, L. Magnea, F. Maltoni, M. Mangano, U. Maor, C. Mariotti, N. Marola, A. D. Martin, A. Meyer, S. Moch, J. Monk, A. Moraes, A. Morsch, L. Motyka, E. Naftali, P. Newman, A. Nikitenko, F. Oljemark, R. Orava, M. Ottela, K. Osterberg, K. Peters, F. Petrucci, A. Piccione, A. Pilkington, K. Piotrzkowski, O. I. Piskounova, A. Proskuryakov, A. Prygarin, J. Pumplin, K. Rabbertz, R. Ranieri, V. Ravindran, B. Reisert, E. Richter-Was, L. Rinaldi, P. Robbe, E. Rodrigues, J. Rojo, H. Ruiz, M. Ruspa, M. G. Ryskin, A. Sabio Vera, G. P. Salam, A. Schalicke, S. Schatzel, T. Schorner-Sadenius, I. Schienbein, F-P. Schilling, S. Schumann, M. H. Seymour, F. Siegert, T. Sjostrand, M. Skrzypek, J. Smith, M. Smizanska, H. Spiesberger, F. Schrempp, A. Stasto, H. Stenzel, W. J. Stirling, P. Szczypka, S. Tapprogge, C. Targett-Adams, M. Tasevsky, T. Teubner, R. S. Thorne, A. Tonazzo, A. Tricoli, N. Tuning, J. Turnau, U. Uwer, P. Van Mechelen, R. Venugopalan, M. Verducci, J. A. M. Vermaseren, A. Vogt, R. Vogt, B. F. L. Ward, Z. Was, G. Watt, B. M. Waugh, C. Weiser, M. R. Whalley, M. Wing, J. Winter, S. A. Yost, G. Zanderighi, N. P. Zotov

**Category:**High Energy Physics - Phenomenology

The HERA electron--proton collider has collected 100 pb$^{-1}$ of data since its start-up in 1992, and recently moved into a high-luminosity operation mode, with upgraded detectors, aiming to increase the total integrated luminosity per experiment to more than 500 pb$^{-1}$. HERA has been a machine of excellence for the study of QCD and the structure of the proton. The Large Hadron Collider (LHC), which will collide protons with a centre-of-mass energy of 14 TeV, will be completed at CERN in 2007. Read More

**Authors:**S. Alekhin, G. Altarelli, N. Amapane, J. Andersen, V. Andreev, M. Arneodo, V. Avati, J. Baines, R. D. Ball, A. Banfi, S. P. Baranov, J. Bartels, O. Behnke, R. Bellan, J. Blumlein, H. Bottcher, S. Bolognesi, M. Boonekamp, D. Bourilkov, J. Bracinik, A. Bruni, G. Bruni, A. Buckley, A. Bunyatyan, C. M. Buttar, J. M. Butterworth, S. Butterworth, M. Cacciari, T. Carli, G. Cerminara, S. Chekanov, M. Ciafaloni, D. Colferai, J. Collins, A. Cooper-Sarkar, G. Corcella, M. Corradi, B. E. Cox, R. Croft, Z. Czyczula, A. Dainese, M. Dasgupta, G. Davatz, L. Del Debbio, Y. Delenda, A. De Roeck, M. Diehl, S. Diglio, G. Dissertori, M. Dittmar, J. Ellis, K. J. Eskola, T. O. Eynck, J. Feltesse, F. Ferro, R. D. Field, J. Forshaw, S. Forte, A. Geiser, S. Gieseke, A. Glazov, T. Gleisberg, P. Golonka, E. Gotsman, G. Grindhammer, M. Grothe, C. Group, M. Groys, A. Guffanti, G. Gustafson, C. Gwenlan, S. Hoche, C. Hogg, J. Huston, G. Iacobucci, G. Ingelman, S. Jadach, H. Jung, J. Kalliopuska, M. Kapishin, B. Kersevan, V. Khoze, M. Klasen, M. Klein, B. A. Kniehl, V. J. Kolhinen, H. Kowalski, G. Kramer, F. Krauss, S. Kretzer, K. Kutak, J. W. Lamsa, L. Lonnblad, T. Lastovicka, G. Lastovicka-Medin, E. Laenen, Th. Lagouri, J. I. Latorre, N. Lavesson, V. Lendermann, E. Levin, A. Levy, A. V. Lipatov, M. Lublinsky, L. Lytkin, T. Maki, L. Magnea, F. Maltoni, M. Mangano, U. Maor, C. Mariotti, N. Marola, A. D. Martin, A. Meyer, S. Moch, J. Monk, A. Moraes, A. Morsch, L. Motyka, E. Naftali, P. Newman, A. Nikitenko, F. Oljemark, R. Orava, M. Ottela, K. Osterberg, K. Peters, F. Petrucci, A. Piccione, A. Pilkington, K. Piotrzkowski, O. I. Piskounova, A. Proskuryakov, A. Prygarin, J. Pumplin, K. Rabbertz, R. Ranieri, V. Ravindran, B. Reisert, E. Richter-Was, L. Rinaldi, P. Robbe, E. Rodrigues, J. Rojo, H. Ruiz, M. Ruspa, M. G. Ryskin, A. Sabio Vera, G. P. Salam, A. Schalicke, S. Schatzel, T. Schorner-Sadenius, I. Schienbein, F-P. Schilling, S. Schumann, M. H. Seymour, F. Siegert, T. Sjostrand, M. Skrzypek, J. Smith, M. Smizanska, H. Spiesberger, F. Schrempp, A. Stasto, H. Stenzel, W. J. Stirling, P. Szczypka, S. Tapprogge, C. Targett-Adams, M. Tasevsky, T. Teubner, R. S. Thorne, A. Tonazzo, A. Tricoli, N. Tuning, J. Turnau, U. Uwer, P. Van Mechelen, R. Venugopalan, M. Verducci, J. A. M. Vermaseren, A. Vogt, R. Vogt, B. F. L. Ward, Z. Was, G. Watt, B. M. Waugh, C. Weiser, M. R. Whalley, M. Wing, J. Winter, S. A. Yost, G. Zanderighi, N. P. Zotov

**Category:**High Energy Physics - Phenomenology

The HERA electron--proton collider has collected 100 pb$^{-1}$ of data since its start-up in 1992, and recently moved into a high-luminosity operation mode, with upgraded detectors, aiming to increase the total integrated luminosity per experiment to more than 500 pb$^{-1}$. HERA has been a machine of excellence for the study of QCD and the structure of the proton. The Large Hadron Collider (LHC), which will collide protons with a centre-of-mass energy of 14 TeV, will be completed at CERN in 2007. Read More

The small x evolution of the QCD pomeron and the QCD odderon is investigated in the mean field limit of the Color Glass Condensate. The resulting system of coupled nonlinear evolution equations is transformed to the momentum space and analyzed at a very small momentum transfer. The main properties of the C-even and C-odd dipole densities in momentum space are obtained analytically. Read More

Diffractive photoproduction of rho, phi and J/psi was studied in the BFKL approach to hard colour singlet exchange. Differential cross sections, the energy dependence and spin density matrix elements were calculated and compared to data from HERA. The overall description of data is reasonably good, except of the single flip amplitude which has the wrong sign. Read More

We summarise recent progress in the computation of helicity amplitudes for diffractive vector meson production at large momentum transfer and their comparison to data collected at the HERA collider. Read More

Diffractive vector meson photoproduction accompanied by proton dissociation is studied for large momentum transfer. The process is described by the non-forward BFKL equation which we use to compare to data collected at the HERA collider. Read More

Diffractive vector meson photoproduction accompanied by proton dissociation is studied for large momentum transfer. The process is described by the non-forward BFKL equation, for which a complete analytical solution is found. The scattering amplitudes for all combinations of helicity are presented. Read More

The unintegrated gluon density in the photon is determined, using the Kimber-Martin-Ryskin prescription . In addition, a model of the unintegrated gluon is proposed, based on the saturation model extended to the large-x region. These gluon densities are applied to obtain cross sections for charm and bottom production in gamma-p and gamma-gamma collisions using the k_t factorization approach. Read More

Diffractive vector meson photoproduction accompanied by proton dissociation is studied for large momentum transfer. The process is described by the non-forward BFKL equation, for which an analytical solution is found for all conformal spins, giving the scattering amplitude. Results are compared to HERA data on rho production. Read More

Diffractive heavy vector meson photoproduction accompanied by proton dissociation is studied for arbitrary momentum transfer. The process is described by the non-forward BFKL equation, for which a complete analytical solution is found, giving the scattering amplitude. The impact of non-leading corrections to the BFKL equation is also analysed. Read More

A saturation model for the total gamma-gamma and gamma*-gamma* cross-sections and for the real photon structure function F_2^gamma(x,Q^2) is described. The model is based on a QCD dipole picture of high energy scattering. The two-dipole cross-section is assumed to satisfy the saturation property with the saturation radius taken from the GBW analysis of the gamma*-p interaction at HERA. Read More

We introduce a saturation model for photon-photon interactions, based on a QCD dipole picture of high energy scattering. The two-dipole cross-section is assumed to satisfy the saturation property. This pomeron-like contribution is supplemented with QPM and non-pomeron reggeon contributions. Read More