M. Bahr - DESY, University Antwerp

M. Bahr
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M. Bahr
DESY, University Antwerp

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High Energy Physics - Phenomenology (14)
High Energy Physics - Experiment (3)
Physics - Instrumentation and Detectors (3)
Astrophysics of Galaxies (1)
Nuclear Experiment (1)
Cosmology and Nongalactic Astrophysics (1)
Computer Science - Numerical Analysis (1)
Computer Science - Computer Vision and Pattern Recognition (1)

Publications Authored By M. Bahr

The integration of surface normals for the purpose of computing the shape of a surface in 3D space is a classic problem in computer vision. However, even nowadays it is still a challenging task to devise a method that combines the flexibility to work on non-trivial computational domains with high accuracy, robustness and computational efficiency. By uniting a classic approach for surface normal integration with modern computational techniques we construct a solver that fulfils these requirements. Read More

Authors: M. Arenz, M. Babutzka, M. Bahr, J. P. Barrett, S. Bauer, M. Beck, A. Beglarian, J. Behrens, T. Bergmann, U. Besserer, J. Blümer, L. I. Bodine, K. Bokeloh, J. Bonn, B. Bornschein, L. Bornschein, S. Büsch, T. H. Burritt, S. Chilingaryan, T. J. Corona, L. De Viveiros, P. J. Doe, O. Dragoun, G. Drexlin, S. Dyba, S. Ebenhöch, K. Eitel, E. Ellinger, S. Enomoto, M. Erhard, D. Eversheim, M. Fedkevych, A. Felden, S. Fischer, J. A. Formaggio, F. Fränkle, D. Furse, M. Ghilea, W. Gil, F. Glück, A. Gonzalez Urena, S. Görhardt, S. Groh, S. Grohmann, R. Grössle, R. Gumbsheimer, M. Hackenjos, V. Hannen, F. Harms, N. Hauÿmann, F. Heizmann, K. Helbing, W. Herz, S. Hickford, D. Hilk, B. Hillen, T. Höhn, B. Holzapfel, M. Hötzel, M. A. Howe, A. Huber, A. Jansen, N. Kernert, L. Kippenbrock, M. Kleesiek, M. Klein, A. Kopmann, A. Kosmider, A. Kovalík, B. Krasch, M. Kraus, H. Krause, M. Krause, L. Kuckert, B. Kuffner, L. La Cascio, O. Lebeda, B. Leiber, J. Letnev, V. M. Lobashev, A. Lokhov, E. Malcherek, M. Mark, E. L. Martin, S. Mertens, S. Mirz, B. Monreal, K. Müller, M. Neuberger, H. Neumann, S. Niemes, M. Noe, N. S. Oblath, A. Off, H. -W. Ortjohann, A. Osipowicz, E. Otten, D. S. Parno, P. Plischke, A. W. P. Poon, M. Prall, F. Priester, P. C. -O. Ranitzsch, J. Reich, O. Rest, R. G. H. Robertson, M. Röllig, S. Rosendahl, S. Rupp, M. Rysavy, K. Schlösser, M. Schlösser, K. Schönung, M. Schrank, J. Schwarz, W. Seiler, H. Seitz-Moskaliuk, J. Sentkerestiova, A. Skasyrskaya, M. Slezak, A. Spalek, M. Steidl, N. Steinbrink, M. Sturm, M. Suesser, H. H. Telle, T. Thümmler, N. Titov, I. Tkachev, N. Trost, A. Unru, K. Valerius, D. Venos, R. Vianden, S. Vöcking, B. L. Wall, N. Wandkowsky, M. Weber, C. Weinheimer, C. Weiss, S. Welte, J. Wendel, K. L. Wierman, J. F. Wilkerson, D. Winzen, J. Wolf, S. Wüstling, M. Zacher, S. Zadoroghny, M. Zboril

The KATRIN experiment will probe the neutrino mass by measuring the beta-electron energy spectrum near the endpoint of tritium beta-decay. An integral energy analysis will be performed by an electro-static spectrometer (Main Spectrometer), an ultra-high vacuum vessel with a length of 23.2 m, a volume of 1240 m^3, and a complex inner electrode system with about 120000 individual parts. Read More

Authors: R. Adhikari, M. Agostini, N. Anh Ky, T. Araki, M. Archidiacono, M. Bahr, J. Baur, J. Behrens, F. Bezrukov, P. S. Bhupal Dev, D. Borah, A. Boyarsky, A. de Gouvea, C. A. de S. Pires, H. J. de Vega, A. G. Dias, P. Di Bari, Z. Djurcic, K. Dolde, H. Dorrer, M. Durero, O. Dragoun, M. Drewes, G. Drexlin, Ch. E. Düllmann, K. Eberhardt, S. Eliseev, C. Enss, N. W. Evans, A. Faessler, P. Filianin, V. Fischer, A. Fleischmann, J. A. Formaggio, J. Franse, F. M. Fraenkle, C. S. Frenk, G. Fuller, L. Gastaldo, A. Garzilli, C. Giunti, F. Glück, M. C. Goodman, M. C. Gonzalez-Garcia, D. Gorbunov, J. Hamann, V. Hannen, S. Hannestad, S. H. Hansen, C. Hassel, J. Heeck, F. Hofmann, T. Houdy, A. Huber, D. Iakubovskyi, A. Ianni, A. Ibarra, R. Jacobsson, T. Jeltema, J. Jochum, S. Kempf, T. Kieck, M. Korzeczek, V. Kornoukhov, T. Lachenmaier, M. Laine, P. Langacker, T. Lasserre, J. Lesgourgues, D. Lhuillier, Y. F. Li, W. Liao, A. W. Long, M. Maltoni, G. Mangano, N. E. Mavromatos, N. Menci, A. Merle, S. Mertens, A. Mirizzi, B. Monreal, A. Nozik, A. Neronov, V. Niro, Y. Novikov, L. Oberauer, E. Otten, N. Palanque-Delabrouille, M. Pallavicini, V. S. Pantuev, E. Papastergis, S. Parke, S. Pascoli, S. Pastor, A. Patwardhan, A. Pilaftsis, D. C. Radford, P. C. -O. Ranitzsch, O. Rest, D. J. Robinson, P. S. Rodrigues da Silva, O. Ruchayskiy, N. G. Sanchez, M. Sasaki, N. Saviano, A. Schneider, F. Schneider, T. Schwetz, S. Schönert, S. Scholl, F. Shankar, R. Shrock, N. Steinbrink, L. Strigari, F. Suekane, B. Suerfu, R. Takahashi, N. Thi Hong Van, I. Tkachev, M. Totzauer, Y. Tsai, C. G. Tully, K. Valerius, J. W. F. Valle, D. Venos, M. Viel, M. Vivier, M. Y. Wang, C. Weinheimer, K. Wendt, L. Winslow, J. Wolf, M. Wurm, Z. Xing, S. Zhou, K. Zuber

We present a comprehensive review of keV-scale sterile neutrino Dark Matter, collecting views and insights from all disciplines involved - cosmology, astrophysics, nuclear, and particle physics - in each case viewed from both theoretical and experimental/observational perspectives. After reviewing the role of active neutrinos in particle physics, astrophysics, and cosmology, we focus on sterile neutrinos in the context of the Dark Matter puzzle. Here, we first review the physics motivation for sterile neutrino Dark Matter, based on challenges and tensions in purely cold Dark Matter scenarios. Read More

A general description is given of Project 8, a new approach to measuring the neutrino mass scale via the beta decay of tritium. In Project 8, the energy of electrons emitted in beta decay is determined from the frequency of cyclotron radiation emitted as the electrons spiral in a uniform magnetic field. Read More

Affiliations: 1Blue Yonder in Karlsruhe, 2CTU in Prague, 3University of Manchester, 4University of Manchester

In their 1997 paper, CDF measured sigma_effective, the normalization factor that relates the cross section for double parton scattering to the product of the inclusive cross sections of the two individual scatters, in a model in which they are assumed to be independent. In his 2007 paper, Treleani pointed out that CDF used a non-standard definition, in which the double parton scattering cross section corresponds to exactly two scatters, rather than the more conventional one in which it is the inclusive two-scatter cross section. He also estimated the correction from one definition to the other, to give a corrected value of sigma_effective. Read More

The Karlsruhe Tritium Neutrino (KATRIN) experiment will measure the absolute mass scale of neutrinos with a sensitivity of $\m_{\nu}$ = 200 meV/c$^2$ by high-precision spectroscopy close to the tritium beta-decay endpoint at 18.6 keV. Its Windowless Gaseous Tritium Source (WGTS) is a beta-decay source of high intensity ($10^{11}$/s) and stability, where high-purity molecular tritium at 30 K is circulated in a closed loop with a yearly throughput of 10 kg. Read More

The objective of this first workshop on Multiple Partonic Interactions (MPI) at the LHC is to raise the profile of MPI studies, summarizing the legacy from the older phenomenology at hadronic colliders and favouring further specific contacts between the theory and experimental communities. The MPI are experiencing a growing popularity and are currently widely invoked to account for observations that would not be explained otherwise: the activity of the Underlying Event, the cross sections for multiple heavy flavour production, the survival probability of large rapidity gaps in hard diffraction, etc. At the same time, the implementation of the MPI effects in the Monte Carlo models is quickly proceeding through an increasing level of sophistication and complexity that in perspective achieves deep general implications for the LHC physics. Read More

Affiliations: 1Karlsruhe, 2University College London, 3Karlsruhe, 4Manchester

We describe the recent developments to extend the multi-parton interaction model of underlying events in Herwig++ into the soft, non-perturbative, regime. This allows the program to describe also minimum bias collisions in which there is no hard interaction, for the first time. It is publicly available from versions 2. Read More

Authors: H. Jung1, A. De Roeck2, Z. J. Ajaltouni3, S. Albino4, G. Altarelli5, F. Ambroglini6, J. Anderson7, G. Antchev8, M. Arneodo9, P. Aspell10, V. Avati11, M. Bahr12, A. Bacchetta13, M. G. Bagliesi14, R. D. Ball15, A. Banfi16, S. Baranov17, P. Bartalini18, J. Bartels19, F. Bechtel20, V. Berardi21, M. Berretti22, G. Beuf23, M. Biasini24, I. Bierenbaum25, J. Blumlein26, R. E. Blair27, C. Bombonati28, M. Boonekamp29, U. Bottigli30, S. Boutle31, M. Bozzo32, E. Brucken33, J. Bracinik34, A. Bruni35, G. E. Bruno36, A. Buckley37, A. Bunyatyan38, H. Burkhardt39, P. Bussey40, A. Buzzo41, M. Cacciari42, F. Cafagna43, M. Calicchio44, F. Caola45, M. G. Catanesi46, P. L. Catastini47, R. Cecchi48, F. A. Ceccopieri49, S. Cerci50, S. Chekanov51, R. Chierici52, M. Ciafaloni53, M. A. Ciocci54, V. Coco55, D. Colferai56, A. Cooper-Sarkar57, G. Corcella58, M. Czakon59, A. Dainese60, M. Dasgupta61, M. Deak62, M. Deile63, P. A. Delsart64, L. Del Debbio65, A. de Roeck66, C. Diaconu67, M. Diehl68, E. Dimovasili69, M. Dittmar70, I. M. Dremin71, K. Eggert72, R. Engel73, V. Eremin74, S. Erhan75, C. Ewerz76, L. Fano77, J. Feltesse78, G. Ferrera79, F. Ferro80, R. Field81, S. Forte82, F. Garcia83, A. Geiser84, F. Gelis85, S. Giani86, S. Gieseke87, M. A. Gigg88, A. Glazov89, K. Golec-Biernat90, K. Goulianos91, J. Grebenyuk92, V. Greco93, D. Grellscheid94, G. Grindhammer95, M. Grothe96, A. Guffanti97, C. Gwenlan98, V. Halyo99, K. Hamilton100, F. Hautmann101, J. Heino102, G. Heinrich103, T. Hilden104, K. Hiller105, J. Hollar106, X. Janssen107, S. Joseph108, A. W. Jung109, H. Jung110, 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: 1DESY, U. Antwerp, 2CERN, U. Antwerp, 3DESY, U. Antwerp, 4DESY, U. Antwerp, 5DESY, U. Antwerp, 6DESY, U. Antwerp, 7DESY, U. Antwerp, 8DESY, U. Antwerp, 9DESY, U. Antwerp, 10DESY, U. Antwerp, 11DESY, U. Antwerp, 12DESY, U. Antwerp, 13DESY, U. Antwerp, 14DESY, U. Antwerp, 15DESY, U. Antwerp, 16DESY, U. Antwerp, 17DESY, U. Antwerp, 18DESY, U. Antwerp, 19DESY, U. Antwerp, 20DESY, U. Antwerp, 21DESY, U. Antwerp, 22DESY, U. Antwerp, 23DESY, U. Antwerp, 24DESY, U. Antwerp, 25DESY, U. Antwerp, 26DESY, U. Antwerp, 27DESY, U. Antwerp, 28DESY, U. Antwerp, 29DESY, U. Antwerp, 30DESY, U. Antwerp, 31DESY, U. Antwerp, 32DESY, U. Antwerp, 33DESY, U. Antwerp, 34DESY, U. Antwerp, 35DESY, U. Antwerp, 36DESY, U. Antwerp, 37DESY, U. Antwerp, 38DESY, U. Antwerp, 39DESY, U. Antwerp, 40DESY, U. Antwerp, 41DESY, U. Antwerp, 42DESY, U. Antwerp, 43DESY, U. Antwerp, 44DESY, U. Antwerp, 45DESY, U. Antwerp, 46DESY, U. Antwerp, 47DESY, U. Antwerp, 48DESY, U. Antwerp, 49DESY, U. Antwerp, 50DESY, U. Antwerp, 51DESY, U. Antwerp, 52DESY, U. Antwerp, 53DESY, U. Antwerp, 54DESY, U. Antwerp, 55DESY, U. Antwerp, 56DESY, U. Antwerp, 57DESY, U. Antwerp, 58DESY, U. Antwerp, 59DESY, U. Antwerp, 60DESY, U. Antwerp, 61DESY, U. Antwerp, 62DESY, U. Antwerp, 63DESY, U. Antwerp, 64DESY, U. Antwerp, 65DESY, U. Antwerp, 66DESY, U. Antwerp, 67DESY, U. Antwerp, 68DESY, U. Antwerp, 69DESY, U. Antwerp, 70DESY, U. Antwerp, 71DESY, U. Antwerp, 72DESY, U. Antwerp, 73DESY, U. Antwerp, 74DESY, U. Antwerp, 75DESY, U. Antwerp, 76DESY, U. Antwerp, 77DESY, U. Antwerp, 78DESY, U. Antwerp, 79DESY, U. Antwerp, 80DESY, U. Antwerp, 81DESY, U. Antwerp, 82DESY, U. Antwerp, 83DESY, U. Antwerp, 84DESY, U. Antwerp, 85DESY, U. Antwerp, 86DESY, U. Antwerp, 87DESY, U. Antwerp, 88DESY, U. Antwerp, 89DESY, U. Antwerp, 90DESY, U. Antwerp, 91DESY, U. Antwerp, 92DESY, U. Antwerp, 93DESY, U. Antwerp, 94DESY, U. Antwerp, 95DESY, U. Antwerp, 96DESY, U. Antwerp, 97DESY, U. Antwerp, 98DESY, U. Antwerp, 99DESY, U. Antwerp, 100DESY, U. Antwerp, 101DESY, U. Antwerp, 102DESY, U. Antwerp, 103DESY, U. Antwerp, 104DESY, U. Antwerp, 105DESY, U. Antwerp, 106DESY, U. Antwerp, 107DESY, U. Antwerp, 108DESY, U. Antwerp, 109DESY, U. Antwerp, 110DESY, U. Antwerp

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

A new release of the Monte Carlo program Herwig++ (version 2.3) is now available. This version includes a number of improvements including: the extension of the program to lepton-hadron collisions; the inclusion of several processes accurate at next-to-leading order in the POsitive Weight Hardest Emission Generator (POWHEG) scheme; the inclusion of three-body decays and finite-width effects in Beyond the Standard Model (BSM) physics processes; a new procedure for reconstructing the kinematics of the parton shower based on the colour structure of the hard scattering process; a new model for baryon decays including excited baryon multiplets; the addition of a soft component to the multiple scattering model of the underlying event; new matrix elements for Deep Inelastic Scattering (DIS) and e+e- processes. Read More

VBFNLO is a fully flexible parton level Monte Carlo program for the simulation of vector boson fusion, double and triple vector boson production in hadronic collisions at next-to-leading order in the strong coupling constant. VBFNLO includes Higgs and vector boson decays with full spin correlations and all off-shell effects. In addition, VBFNLO implements CP-even and CP-odd Higgs boson via gluon fusion, associated with two jets, at the leading-order one-loop level with the full top- and bottom-quark mass dependence in a generic two-Higgs-doublet model. Read More

In this contribution we describe the new model of multiple partonic interactions (MPI) that has been implemented in Herwig++. Tuning its two free parameters is enough to find a good description of CDF underlying event data. We show extrapolations to the LHC and compare them to results from other models. Read More

In this contribution we describe a new model of multiple partonic interactions that has been implemented in Herwig++. Tuning its two free parameters we find a good description of CDF underlying event data. We show extrapolations to the LHC and discuss intrinsic PDF uncertainties. Read More

Multiple partonic interactions are widely used to simulate the hadronic final state in high energy hadronic collisions, and successfully describe many features of the data. It is important to make maximum use of the available physical constraints on such models, particularly given the large extrapolation from current high energy data to LHC energies. In eikonal models, the rate of multiparton interactions is coupled to the energy dependence of the total cross section. Read More

A new release of the Monte Carlo program Herwig++ (version 2.2) is now available. This version includes a number of improvements including: matrix elements for the production of an electroweak gauge boson, W and Z, in association with a jet; several new processes for Higgs production in association with an electroweak gauge boson; and the matrix element correction for QCD radiation in Higgs production via gluon fusion. Read More

In this paper we describe a new model of multiple partonic interactions that has been implemented in Herwig++. Tuning its two free parameters we find a good description of CDF underlying event data. We show extrapolations to the LHC. Read More

In this paper we describe Herwig++ version 2.3, a general-purpose Monte Carlo event generator for the simulation of hard lepton-lepton, lepton-hadron and hadron-hadron collisions. A number of important hard scattering processes are available, together with an interface via the Les Houches Accord to specialized matrix element generators for additional processes. Read More

A new release of the Monte Carlo program Herwig++ (version 2.1) is now available. This version includes a number of significant improvements including: an eikonal multiple parton-parton scattering model of the underlying event; the inclusion of Beyond the Standard Model physics; and a new hadronic decay model tuned to LEP data. Read More