O. K. Baker - Hampton University

O. K. Baker
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O. K. Baker
Hampton University
United States

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Nuclear Experiment (17)
High Energy Physics - Experiment (13)
High Energy Physics - Phenomenology (8)
Physics - Instrumentation and Detectors (6)
Cosmology and Nongalactic Astrophysics (3)
Mathematics - Group Theory (2)
Physics - Optics (1)
Instrumentation and Methods for Astrophysics (1)
Astrophysics (1)

Publications Authored By O. K. Baker

Structure functions, as measured in lepton-nucleon scattering, have proven to be very useful in studying the quark dynamics within the nucleon. However, it is experimentally difficult to separately determine the longitudinal and transverse structure functions, and consequently there are substantially less data available for the longitudinal structure function in particular. Here we present separated structure functions for hydrogen and deuterium at low four--momentum transfer squared, Q^2< 1 GeV^2, and compare these with parton distribution parameterizations and a k_T factorization approach. Read More

Background: Measurements of forward exclusive meson production at different squared four-momenta of the exchanged virtual photon, $Q^2$, and at different four-momentum transfer, t, can be used to probe QCD's transition from meson-nucleon degrees of freedom at long distances to quark-gluon degrees of freedom at short scales. Ratios of separated response functions in $\pi^-$ and $\pi^+$ electroproduction are particularly informative. The ratio for transverse photons may allow this transition to be more easily observed, while the ratio for longitudinal photons provides a crucial verification of the assumed pole dominance, needed for reliable extraction of the pion form factor from electroproduction data. Read More

Several proposed models of the cold dark matter in the universe include light neutral bosons with sub-eV masses. In many cases their detection hinges on their infrequent interactions with Standard Model photons at sub-eV energies. We describe the design and performance of an experiment to search for aberrations from the broadband noise power associated with a 5 K copper resonant cavity in the vicinity of 34 GHz (0. Read More

Authors: L. Tang1, C. Chen2, T. Gogami3, D. Kawama4, Y. Han5, L. Yuan6, A. Matsumura7, Y. Okayasu8, T. Seva9, V. M. Rodriguez10, P. Baturin11, A. Acha12, P. Achenbach13, A. Ahmidouch14, I. Albayrak15, D. Androic16, A. Asaturyan17, R. Asaturyan18, O. Ates19, R. Badui20, O. K. Baker21, F. Benmokhtar22, W. Boeglin23, J. Bono24, P. Bosted25, E. Brash26, P. Carter27, R. Carlini28, A. Chiba29, M. E. Christy30, L. Cole31, M. M. Dalton32, S. Danagoulian33, A. Daniel34, R. De Leo35, V. Dharmawardane36, D. Doi37, K. Egiyan38, M. Elaasar39, R. Ent40, H. Fenker41, Y. Fujii42, M. Furic43, M. Gabrielyan44, L. Gan45, F. Garibaldi46, D. Gaskell47, A. Gasparian48, E. F. Gibson49, P. Gueye50, O. Hashimoto51, D. Honda52, T. Horn53, B. Hu54, Ed V. Hungerford55, C. Jayalath56, M. Jones57, K. Johnston58, N. Kalantarians59, H. Kanda60, M. Kaneta61, F. Kato62, S. Kato63, M. Kawai64, C. Keppel65, H. Khanal66, M. Kohl67, L. Kramer68, K. J. Lan69, Y. Li70, A. Liyanage71, W. Luo72, D. Mack73, K. Maeda74, S. Malace75, A. Margaryan76, G. Marikyan77, P. Markowitz78, T. Maruta79, N. Maruyama80, V. Maxwell81, D. J. Millener82, T. Miyoshi83, A. Mkrtchyan84, H. Mkrtchyan85, T. Motoba86, S. Nagao87, S. N. Nakamura88, A. Narayan89, C. Neville90, G. Niculescu91, M. I. Niculescu92, A. Nunez93, Nuruzzaman94, H. Nomura95, K. Nonaka96, A. Ohtani97, M. Oyamada98, N. Perez99, T. Petkovic100, J. Pochodzalla101, X. Qiu102, S. Randeniya103, B. Raue104, J. Reinhold105, R. Rivera106, J. Roche107, C. Samanta108, Y. Sato109, B. Sawatzky110, E. K. Segbefia111, D. Schott112, A. Shichijo113, N. Simicevic114, G. Smith115, Y. Song116, M. Sumihama117, V. Tadevosyan118, T. Takahashi119, N. Taniya120, K. Tsukada121, V. Tvaskis122, M. Veilleux123, W. Vulcan124, S. Wells125, F. R. Wesselmann126, S. A. Wood127, T. Yamamoto128, C. Yan129, Z. Ye130, K. Yokota131, S. Zhamkochyan132, L. Zhu133
Affiliations: 1HKS - JLab E05-115 and E01-001 - Collaborations, 2HKS - JLab E05-115 and E01-001 - Collaborations, 3HKS - JLab E05-115 and E01-001 - Collaborations, 4HKS - JLab E05-115 and E01-001 - Collaborations, 5HKS - JLab E05-115 and E01-001 - Collaborations, 6HKS - JLab E05-115 and E01-001 - Collaborations, 7HKS - JLab E05-115 and E01-001 - Collaborations, 8HKS - JLab E05-115 and E01-001 - Collaborations, 9HKS - JLab E05-115 and E01-001 - Collaborations, 10HKS - JLab E05-115 and E01-001 - Collaborations, 11HKS - JLab E05-115 and E01-001 - Collaborations, 12HKS - JLab E05-115 and E01-001 - Collaborations, 13HKS - JLab E05-115 and E01-001 - Collaborations, 14HKS - JLab E05-115 and E01-001 - Collaborations, 15HKS - JLab E05-115 and E01-001 - Collaborations, 16HKS - JLab E05-115 and E01-001 - Collaborations, 17HKS - JLab E05-115 and E01-001 - Collaborations, 18HKS - JLab E05-115 and E01-001 - Collaborations, 19HKS - JLab E05-115 and E01-001 - Collaborations, 20HKS - JLab E05-115 and E01-001 - Collaborations, 21HKS - JLab E05-115 and E01-001 - Collaborations, 22HKS - JLab E05-115 and E01-001 - Collaborations, 23HKS - JLab E05-115 and E01-001 - Collaborations, 24HKS - JLab E05-115 and E01-001 - Collaborations, 25HKS - JLab E05-115 and E01-001 - Collaborations, 26HKS - JLab E05-115 and E01-001 - Collaborations, 27HKS - JLab E05-115 and E01-001 - Collaborations, 28HKS - JLab E05-115 and E01-001 - Collaborations, 29HKS - JLab E05-115 and E01-001 - Collaborations, 30HKS - JLab E05-115 and E01-001 - Collaborations, 31HKS - JLab E05-115 and E01-001 - Collaborations, 32HKS - JLab E05-115 and E01-001 - Collaborations, 33HKS - JLab E05-115 and E01-001 - Collaborations, 34HKS - JLab E05-115 and E01-001 - Collaborations, 35HKS - JLab E05-115 and E01-001 - Collaborations, 36HKS - JLab E05-115 and E01-001 - Collaborations, 37HKS - JLab E05-115 and E01-001 - Collaborations, 38HKS - JLab E05-115 and E01-001 - Collaborations, 39HKS - JLab E05-115 and E01-001 - Collaborations, 40HKS - JLab E05-115 and E01-001 - Collaborations, 41HKS - JLab E05-115 and E01-001 - Collaborations, 42HKS - JLab E05-115 and E01-001 - Collaborations, 43HKS - JLab E05-115 and E01-001 - Collaborations, 44HKS - JLab E05-115 and E01-001 - Collaborations, 45HKS - JLab E05-115 and E01-001 - Collaborations, 46HKS - JLab E05-115 and E01-001 - Collaborations, 47HKS - JLab E05-115 and E01-001 - Collaborations, 48HKS - JLab E05-115 and E01-001 - Collaborations, 49HKS - JLab E05-115 and E01-001 - Collaborations, 50HKS - JLab E05-115 and E01-001 - Collaborations, 51HKS - JLab E05-115 and E01-001 - Collaborations, 52HKS - JLab E05-115 and E01-001 - Collaborations, 53HKS - JLab E05-115 and E01-001 - Collaborations, 54HKS - JLab E05-115 and E01-001 - Collaborations, 55HKS - JLab E05-115 and E01-001 - Collaborations, 56HKS - JLab E05-115 and E01-001 - Collaborations, 57HKS - JLab E05-115 and E01-001 - Collaborations, 58HKS - JLab E05-115 and E01-001 - Collaborations, 59HKS - JLab E05-115 and E01-001 - Collaborations, 60HKS - JLab E05-115 and E01-001 - Collaborations, 61HKS - JLab E05-115 and E01-001 - Collaborations, 62HKS - JLab E05-115 and E01-001 - Collaborations, 63HKS - JLab E05-115 and E01-001 - Collaborations, 64HKS - JLab E05-115 and E01-001 - Collaborations, 65HKS - JLab E05-115 and E01-001 - Collaborations, 66HKS - JLab E05-115 and E01-001 - Collaborations, 67HKS - JLab E05-115 and E01-001 - Collaborations, 68HKS - JLab E05-115 and E01-001 - Collaborations, 69HKS - JLab E05-115 and E01-001 - Collaborations, 70HKS - JLab E05-115 and E01-001 - Collaborations, 71HKS - JLab E05-115 and E01-001 - Collaborations, 72HKS - JLab E05-115 and E01-001 - Collaborations, 73HKS - JLab E05-115 and E01-001 - Collaborations, 74HKS - JLab E05-115 and E01-001 - Collaborations, 75HKS - JLab E05-115 and E01-001 - Collaborations, 76HKS - JLab E05-115 and E01-001 - Collaborations, 77HKS - JLab E05-115 and E01-001 - Collaborations, 78HKS - JLab E05-115 and E01-001 - Collaborations, 79HKS - JLab E05-115 and E01-001 - Collaborations, 80HKS - JLab E05-115 and E01-001 - Collaborations, 81HKS - JLab E05-115 and E01-001 - Collaborations, 82HKS - JLab E05-115 and E01-001 - Collaborations, 83HKS - JLab E05-115 and E01-001 - Collaborations, 84HKS - JLab E05-115 and E01-001 - Collaborations, 85HKS - JLab E05-115 and E01-001 - Collaborations, 86HKS - JLab E05-115 and E01-001 - Collaborations, 87HKS - JLab E05-115 and E01-001 - Collaborations, 88HKS - JLab E05-115 and E01-001 - Collaborations, 89HKS - JLab E05-115 and E01-001 - Collaborations, 90HKS - JLab E05-115 and E01-001 - Collaborations, 91HKS - JLab E05-115 and E01-001 - Collaborations, 92HKS - JLab E05-115 and E01-001 - Collaborations, 93HKS - JLab E05-115 and E01-001 - Collaborations, 94HKS - JLab E05-115 and E01-001 - Collaborations, 95HKS - JLab E05-115 and E01-001 - Collaborations, 96HKS - JLab E05-115 and E01-001 - Collaborations, 97HKS - JLab E05-115 and E01-001 - Collaborations, 98HKS - JLab E05-115 and E01-001 - Collaborations, 99HKS - JLab E05-115 and E01-001 - Collaborations, 100HKS - JLab E05-115 and E01-001 - Collaborations, 101HKS - JLab E05-115 and E01-001 - Collaborations, 102HKS - JLab E05-115 and E01-001 - Collaborations, 103HKS - JLab E05-115 and E01-001 - Collaborations, 104HKS - JLab E05-115 and E01-001 - Collaborations, 105HKS - JLab E05-115 and E01-001 - Collaborations, 106HKS - JLab E05-115 and E01-001 - Collaborations, 107HKS - JLab E05-115 and E01-001 - Collaborations, 108HKS - JLab E05-115 and E01-001 - Collaborations, 109HKS - JLab E05-115 and E01-001 - Collaborations, 110HKS - JLab E05-115 and E01-001 - Collaborations, 111HKS - JLab E05-115 and E01-001 - Collaborations, 112HKS - JLab E05-115 and E01-001 - Collaborations, 113HKS - JLab E05-115 and E01-001 - Collaborations, 114HKS - JLab E05-115 and E01-001 - Collaborations, 115HKS - JLab E05-115 and E01-001 - Collaborations, 116HKS - JLab E05-115 and E01-001 - Collaborations, 117HKS - JLab E05-115 and E01-001 - Collaborations, 118HKS - JLab E05-115 and E01-001 - Collaborations, 119HKS - JLab E05-115 and E01-001 - Collaborations, 120HKS - JLab E05-115 and E01-001 - Collaborations, 121HKS - JLab E05-115 and E01-001 - Collaborations, 122HKS - JLab E05-115 and E01-001 - Collaborations, 123HKS - JLab E05-115 and E01-001 - Collaborations, 124HKS - JLab E05-115 and E01-001 - Collaborations, 125HKS - JLab E05-115 and E01-001 - Collaborations, 126HKS - JLab E05-115 and E01-001 - Collaborations, 127HKS - JLab E05-115 and E01-001 - Collaborations, 128HKS - JLab E05-115 and E01-001 - Collaborations, 129HKS - JLab E05-115 and E01-001 - Collaborations, 130HKS - JLab E05-115 and E01-001 - Collaborations, 131HKS - JLab E05-115 and E01-001 - Collaborations, 132HKS - JLab E05-115 and E01-001 - Collaborations, 133HKS - JLab E05-115 and E01-001 - Collaborations

Since the pioneering experiment, E89-009 studying hypernuclear spectroscopy using the $(e,e^{\prime}K^+)$ reaction was completed, two additional experiments, E01-011 and E05-115, were performed at Jefferson Lab. These later experiments used a modified experimental design, the "tilt method", to dramatically suppress the large electromagnetic background, and allowed for a substantial increase in luminosity. Additionally, a new kaon spectrometer, HKS (E01-011), a new electron spectrometer, HES, and a new splitting magnet were added to produce precision, high-resolution hypernuclear spectroscopy. Read More

Affiliations: 1The Jefferson Lab Fpi Collaboration, 2The Jefferson Lab Fpi Collaboration, 3The Jefferson Lab Fpi Collaboration, 4The Jefferson Lab Fpi Collaboration, 5The Jefferson Lab Fpi Collaboration, 6The Jefferson Lab Fpi Collaboration, 7The Jefferson Lab Fpi Collaboration, 8The Jefferson Lab Fpi Collaboration, 9The Jefferson Lab Fpi Collaboration, 10The Jefferson Lab Fpi Collaboration, 11The Jefferson Lab Fpi Collaboration, 12The Jefferson Lab Fpi Collaboration, 13The Jefferson Lab Fpi Collaboration, 14The Jefferson Lab Fpi Collaboration, 15The Jefferson Lab Fpi Collaboration, 16The Jefferson Lab Fpi Collaboration, 17The Jefferson Lab Fpi Collaboration, 18The Jefferson Lab Fpi Collaboration, 19The Jefferson Lab Fpi Collaboration, 20The Jefferson Lab Fpi Collaboration, 21The Jefferson Lab Fpi Collaboration, 22The Jefferson Lab Fpi Collaboration, 23The Jefferson Lab Fpi Collaboration, 24The Jefferson Lab Fpi Collaboration, 25The Jefferson Lab Fpi Collaboration, 26The Jefferson Lab Fpi Collaboration, 27The Jefferson Lab Fpi Collaboration, 28The Jefferson Lab Fpi Collaboration, 29The Jefferson Lab Fpi Collaboration, 30The Jefferson Lab Fpi Collaboration, 31The Jefferson Lab Fpi Collaboration, 32The Jefferson Lab Fpi Collaboration, 33The Jefferson Lab Fpi Collaboration, 34The Jefferson Lab Fpi Collaboration, 35The Jefferson Lab Fpi Collaboration, 36The Jefferson Lab Fpi Collaboration, 37The Jefferson Lab Fpi Collaboration, 38The Jefferson Lab Fpi Collaboration, 39The Jefferson Lab Fpi Collaboration, 40The Jefferson Lab Fpi Collaboration, 41The Jefferson Lab Fpi Collaboration, 42The Jefferson Lab Fpi Collaboration, 43The Jefferson Lab Fpi Collaboration, 44The Jefferson Lab Fpi Collaboration, 45The Jefferson Lab Fpi Collaboration, 46The Jefferson Lab Fpi Collaboration, 47The Jefferson Lab Fpi Collaboration, 48The Jefferson Lab Fpi Collaboration, 49The Jefferson Lab Fpi Collaboration, 50The Jefferson Lab Fpi Collaboration, 51The Jefferson Lab Fpi Collaboration, 52The Jefferson Lab Fpi Collaboration, 53The Jefferson Lab Fpi Collaboration, 54The Jefferson Lab Fpi Collaboration, 55The Jefferson Lab Fpi Collaboration, 56The Jefferson Lab Fpi Collaboration, 57The Jefferson Lab Fpi Collaboration, 58The Jefferson Lab Fpi Collaboration, 59The Jefferson Lab Fpi Collaboration, 60The Jefferson Lab Fpi Collaboration, 61The Jefferson Lab Fpi Collaboration, 62The Jefferson Lab Fpi Collaboration, 63The Jefferson Lab Fpi Collaboration, 64The Jefferson Lab Fpi Collaboration, 65The Jefferson Lab Fpi Collaboration, 66The Jefferson Lab Fpi Collaboration, 67The Jefferson Lab Fpi Collaboration, 68The Jefferson Lab Fpi Collaboration, 69The Jefferson Lab Fpi Collaboration, 70The Jefferson Lab Fpi Collaboration, 71The Jefferson Lab Fpi Collaboration, 72The Jefferson Lab Fpi Collaboration, 73The Jefferson Lab Fpi Collaboration, 74The Jefferson Lab Fpi Collaboration, 75The Jefferson Lab Fpi Collaboration, 76The Jefferson Lab Fpi Collaboration, 77The Jefferson Lab Fpi Collaboration, 78The Jefferson Lab Fpi Collaboration, 79The Jefferson Lab Fpi Collaboration, 80The Jefferson Lab Fpi Collaboration, 81The Jefferson Lab Fpi Collaboration, 82The Jefferson Lab Fpi Collaboration, 83The Jefferson Lab Fpi Collaboration, 84The Jefferson Lab Fpi Collaboration, 85The Jefferson Lab Fpi Collaboration, 86The Jefferson Lab Fpi Collaboration, 87The Jefferson Lab Fpi Collaboration, 88The Jefferson Lab Fpi Collaboration

The study of exclusive $\pi^{\pm}$ electroproduction on the nucleon, including separation of the various structure functions, is of interest for a number of reasons. The ratio $R_L=\sigma_L^{\pi^-}/\sigma_L^{\pi^+}$ is sensitive to isoscalar contamination to the dominant isovector pion exchange amplitude, which is the basis for the determination of the charged pion form factor from electroproduction data. A change in the value of $R_T=\sigma_T^{\pi^-}/\sigma_T^{\pi^+}$ from unity at small $-t$, to 1/4 at large $-t$, would suggest a transition from coupling to a (virtual) pion to coupling to individual quarks. Read More

It is generally accepted that certain astronomical and cosmological observations can be explained by invoking the concepts of Dark Matter and Dark Energy (DM/DE). Applying straightforward extensions of the Standard Model to DM/DE, results in scalar fields and predictions of particles generation via photo-magnetic coupling . Under the right conditions, these particles should be observable in earth-bound laboratory settings. Read More

Dark sectors, consisting of new, light, weakly-coupled particles that do not interact with the known strong, weak, or electromagnetic forces, are a particularly compelling possibility for new physics. Nature may contain numerous dark sectors, each with their own beautiful structure, distinct particles, and forces. This review summarizes the physics motivation for dark sectors and the exciting opportunities for experimental exploration. Read More

Light axion-like particles (ALPs) that couple to two photons are allowed in a number of proposed extensions to the Standard Model of elementary particles. Of particular interest from a theoretical and observational standpoint is the energy regime near 0.1 meV. Read More

We prove that Cannon-Thurston maps are well-defined (that is, subgroup inclusion induces a map of the boundaries) for heavily distorted free subgroups inside the family of hyperbolic groups known as hyperbolic hydra. Whilst this indicates that distortion is not an obstacle to the map being well-defined, we show that heavy subgroup distortion always manifests in Cannon-Thurston maps (when they are well-defined) in that their continuity is quantifiably wild. Read More

Affiliations: 1HKS, 2HKS, 3HKS, 4HKS, 5HKS, 6HKS, 7HKS, 8HKS, 9HKS, 10HKS, 11HKS, 12HKS, 13HKS, 14HKS, 15HKS, 16HKS, 17HKS, 18HKS, 19HKS, 20HKS, 21HKS, 22HKS, 23HKS, 24HKS, 25HKS, 26HKS, 27HKS, 28HKS, 29HKS, 30HKS, 31HKS, 32HKS, 33HKS, 34HKS, 35HKS, 36HKS, 37HKS, 38HKS, 39HKS, 40HKS, 41HKS, 42HKS, 43HKS, 44HKS, 45HKS, 46HKS, 47HKS, 48HKS, 49HKS, 50HKS, 51HKS, 52HKS, 53HKS, 54HKS, 55HKS, 56HKS, 57HKS, 58HKS, 59HKS, 60HKS, 61HKS, 62HKS, 63HKS, 64HKS, 65HKS, 66HKS, 67HKS, 68HKS, 69HKS, 70HKS, 71HKS, 72HKS, 73HKS, 74HKS, 75HKS, 76HKS, 77HKS, 78HKS, 79HKS, 80HKS, 81HKS, 82HKS, 83HKS, 84HKS, 85HKS, 86HKS, 87HKS, 88HKS, 89HKS, 90HKS, 91HKS, 92HKS, 93HKS

An experiment with a newly developed high-resolution kaon spectrometer (HKS) and a scattered electron spectrometer with a novel configuration was performed in Hall C at Jefferson Lab (JLab). The ground state of a neutron-rich hypernucleus, He 7 Lambda, was observed for the first time with the (e,e'K+) reaction with an energy resolution of ~0.6 MeV. Read More

We construct an example of a hyperbolic group with a hyperbolic subgroup for which the Cannon-Thurston map does not exist. That is, inclusion does not induce a map of the boundaries. Read More

Authors: J. L. Hewett, H. Weerts, R. Brock, J. N. Butler, B. C. K. Casey, J. Collar, A. de Gouvea, R. Essig, Y. Grossman, W. Haxton, J. A. Jaros, C. K. Jung, Z. T. Lu, K. Pitts, Z. Ligeti, J. R. Patterson, M. Ramsey-Musolf, J. L. Ritchie, A. Roodman, K. Scholberg, C. E. M. Wagner, G. P. Zeller, S. Aefsky, A. Afanasev, K. Agashe, C. Albright, J. Alonso, C. Ankenbrandt, M. Aoki, C. A. Arguelles, N. Arkani-Hamed, J. R. Armendariz, C. Armendariz-Picon, E. Arrieta Diaz, J. Asaadi, D. M. Asner, K. S. Babu, K. Bailey, O. Baker, B. Balantekin, B. Baller, M. Bass, B. Batell, J. Beacham, J. Behr, N. Berger, M. Bergevin, E. Berman, R. Bernstein, A. J. Bevan, M. Bishai, M. Blanke, S. Blessing, A. Blondel, T. Blum, G. Bock, A. Bodek, G. Bonvicini, F. Bossi, J. Boyce, R. Breedon, M. Breidenbach, S. J. Brice, R. A. Briere, S. Brodsky, C. Bromberg, A. Bross, T. E. Browder, D. A. Bryman, M. Buckley, R. Burnstein, E. Caden, P. Campana, R. Carlini, G. Carosi, C. Castromonte, R. Cenci, I. Chakaberia, M. C. Chen, C. H. Cheng, B. Choudhary, N. H. Christ, E. Christensen, M. E. Christy, T. E. Chupp, E. Church, D. B. Cline, T. E. Coan, P. Coloma, J. Comfort, L. Coney, J. Cooper, R. J. Cooper, R. Cowan, D. F. Cowen, D. Cronin-Hennessy, A. Datta, G. S. Davies, M. Demarteau, D. P. DeMille, A. Denig, R. Dermisek, A. Deshpande, M. S. Dewey, R. Dharmapalan, J. Dhooghe, M. R. Dietrich, M. Diwan, Z. Djurcic, S. Dobbs, M. Duraisamy, B. Dutta, H. Duyang, D. A. Dwyer, M. Eads, B. Echenard, S. R. Elliott, C. Escobar, J. Fajans, S. Farooq, C. Faroughy, J. E. Fast, B. Feinberg, J. Felde, G. Feldman, P. Fierlinger, P. Fileviez Perez, B. Filippone, P. Fisher, B. T. Flemming, K. T. Flood, R. Forty, M. J. Frank, A. Freyberger, A. Friedland, R. Gandhi, K. S. Ganezer, A. Garcia, F. G. Garcia, S. Gardner, L. Garrison, A. Gasparian, S. Geer, V. M. Gehman, T. Gershon, M. Gilchriese, C. Ginsberg, I. Gogoladze, M. Gonderinger, M. Goodman, H. Gould, M. Graham, P. W. Graham, R. Gran, J. Grange, G. Gratta, J. P. Green, H. Greenlee, R. C. Group, E. Guardincerri, V. Gudkov, R. Guenette, A. Haas, A. Hahn, T. Han, T. Handler, J. C. Hardy, R. Harnik, D. A. Harris, F. A. Harris, P. G. Harris, J. Hartnett, B. He, B. R. Heckel, K. M. Heeger, S. Henderson, D. Hertzog, R. Hill, E. A Hinds, D. G. Hitlin, R. J. Holt, N. Holtkamp, G. Horton-Smith, P. Huber, W. Huelsnitz, J. Imber, I. Irastorza, J. Jaeckel, I. Jaegle, C. James, A. Jawahery, D. Jensen, C. P. Jessop, B. Jones, H. Jostlein, T. Junk, A. L. Kagan, M. Kalita, Y. Kamyshkov, D. M. Kaplan, G. Karagiorgi, A. Karle, T. Katori, B. Kayser, R. Kephart, S. Kettell, Y. K. Kim, M. Kirby, K. Kirch, J. Klein, J. Kneller, A. Kobach, M. Kohl, J. Kopp, M. Kordosky, W. Korsch, I. Kourbanis, A. D. Krisch, P. Krizan, A. S. Kronfeld, S. Kulkarni, K. S. Kumar, Y. Kuno, T. Kutter, T. Lachenmaier, M. Lamm, J. Lancaster, M. Lancaster, C. Lane, K. Lang, P. Langacker, S. Lazarevic, T. Le, K. Lee, K. T. Lesko, Y. Li, M. Lindgren, A. Lindner, J. Link, D. Lissauer, L. S. Littenberg, B. Littlejohn, C. Y. Liu, W. Loinaz, W. Lorenzon, W. C. Louis, J. Lozier, L. Ludovici, L. Lueking, C. Lunardini, D. B. MacFarlane, P. A. N. Machado, P. B. Mackenzie, J. Maloney, W. J. Marciano, W. Marsh, M. Marshak, J. W. Martin, C. Mauger, K. S. McFarland, C. McGrew, G. McLaughlin, D. McKeen, R. McKeown, B. T. Meadows, R. Mehdiyev, D. Melconian, H. Merkel, M. Messier, J. P. Miller, G. Mills, U. K. Minamisono, S. R. Mishra, I. Mocioiu, S. Moed Sher, R. N. Mohapatra, B. Monreal, C. D. Moore, J. G. Morfin, J. Mousseau, L. A. Moustakas, G. Mueller, P. Mueller, M. Muether, H. P. Mumm, C. Munger, H. Murayama, P. Nath, O. Naviliat-Cuncin, J. K. Nelson, D. Neuffer, J. S. Nico, A. Norman, D. Nygren, Y. Obayashi, T. P. O'Connor, Y. Okada, J. Olsen, L. Orozco, J. L. Orrell, J. Osta, B. Pahlka, J. Paley, V. Papadimitriou, M. Papucci, S. Parke, R. H. Parker, Z. Parsa, K. Partyka, A. Patch, J. C. Pati, R. B. Patterson, Z. Pavlovic, G. Paz, G. N. Perdue, D. Perevalov, G. Perez, R. Petti, W. Pettus, A. Piepke, M. Pivovaroff, R. Plunkett, C. C. Polly, M. Pospelov, R. Povey, A. Prakesh, M. V. Purohit, S. Raby, J. L. Raaf, R. Rajendran, S. Rajendran, G. Rameika, R. Ramsey, A. Rashed, B. N. Ratcliff, B. Rebel, J. Redondo, P. Reimer, D. Reitzner, F. Ringer, A. Ringwald, S. Riordan, B. L. Roberts, D. A. Roberts, R. Robertson, F. Robicheaux, M. Rominsky, R. Roser, J. L. Rosner, C. Rott, P. Rubin, N. Saito, M. Sanchez, S. Sarkar, H. Schellman, B. Schmidt, M. Schmitt, D. W. Schmitz, J. Schneps, A. Schopper, P. Schuster, A. J. Schwartz, M. Schwarz, J. Seeman, Y. K. Semertzidis, K. K. Seth, Q. Shafi, P. Shanahan, R. Sharma, S. R. Sharpe, M. Shiozawa, V. Shiltsev, K. Sigurdson, P. Sikivie, J. Singh, D. Sivers, T. Skwarnicki, N. Smith, J. Sobczyk, H. Sobel, M. Soderberg, Y. H. Song, A. Soni, P. Souder, A. Sousa, J. Spitz, M. Stancari, G. C. Stavenga, J. H. Steffen, S. Stepanyan, D. Stoeckinger, S. Stone, J. Strait, M. Strassler, I. A. Sulai, R. Sundrum, R. Svoboda, B. Szczerbinska, A. Szelc, T. Takeuchi, P. Tanedo, S. Taneja, J. Tang, D. B. Tanner, R. Tayloe, I. Taylor, J. Thomas, C. Thorn, X. Tian, B. G. Tice, M. Tobar, N. Tolich, N. Toro, I. S. Towner, Y. Tsai, R. Tschirhart, C. D. Tunnell, M. Tzanov, A. Upadhye, J. Urheim, S. Vahsen, A. Vainshtein, E. Valencia, R. G. Van de Water, R. S. Van de Water, M. Velasco, J. Vogel, P. Vogel, W. Vogelsang, Y. W. Wah, D. Walker, N. Weiner, A. Weltman, R. Wendell, W. Wester, M. Wetstein, C. White, L. Whitehead, J. Whitmore, E. Widmann, G. Wiedemann, J. Wilkerson, G. Wilkinson, P. Wilson, R. J. Wilson, W. Winter, M. B. Wise, J. Wodin, S. Wojcicki, B. Wojtsekhowski, T. Wongjirad, E. Worcester, J. Wurtele, T. Xin, J. Xu, T. Yamanaka, Y. Yamazaki, I. Yavin, J. Yeck, M. Yeh, M. Yokoyama, J. Yoo, A. Young, E. Zimmerman, K. Zioutas, M. Zisman, J. Zupan, R. Zwaska

The Proceedings of the 2011 workshop on Fundamental Physics at the Intensity Frontier. Science opportunities at the intensity frontier are identified and described in the areas of heavy quarks, charged leptons, neutrinos, proton decay, new light weakly-coupled particles, and nucleons, nuclei, and atoms. Read More

The radiation pressure due to reflected chameleons is suggested for their detection. Sensitive photon radiation pressure or force measuring techniques could become the new antennas for chameleons or other particles with similar properties, with gravitational waves antennas being also of potential interest. This is eventually only at first sight a Gedankenexperiment. Read More

In this work we consider searches for dark matter made of axions or axion-like particles (ALPs) using resonant radio frequency cavities inserted into dipole magnets from particle accelerators, wiggler magnets developed for accelerator based advanced light sources, and toroidal magnets similar to those used in particle physics detectors. We investigate the expected sensitivity of such ALP dark matter detectors and discuss the engineering aspects of building and tuning them. Brief mention is also made of even stronger field magnets that are becoming available due to improvements in magnetic technology. Read More

A large set of cross sections for semi-inclusive electroproduction of charged pions ($\pi^\pm$) from both proton and deuteron targets was measured. The data are in the deep-inelastic scattering region with invariant mass squared $W^2$ > 4 GeV$^2$ and range in four-momentum transfer squared $2 < Q^2 < 4$ (GeV/c)$^2$, and cover a range in the Bjorken scaling variable 0.2 < x < 0. Read More

Authors: E. Abat, J. M. Abdallah, T. N. Addy, P. Adragna, M. Aharrouche, A. Ahmad, T. P. A. Akesson, M. Aleksa, C. Alexa, K. Anderson, A. Andreazza, F. Anghinolfi, A. Antonaki, G. Arabidze, E. Arik, T. Atkinson, J. Baines, O. K. Baker, D. Banfi, S. Baron, A. J. Barr, R. Beccherle, H. P. Beck, B. Belhorma, P. J. Bell, D. Benchekroun, D. P. Benjamin, K. Benslama, E. Bergeaas Kuutmann, J. Bernabeu, H. Bertelsen, S. Binet, C. Biscarat, V. Boldea, V. G. Bondarenko, M. Boonekamp, M. Bosman, C. Bourdarios, Z. Broklova, D. Burckhart Chromek, V. Bychkov, J. Callahan, D. Calvet, M. Canneri, M. Capeáns Garrido, M. Caprini, L. Cardiel Sas, T. Carli, L. Carminati, J. Carvalho, M. Cascella, M. V. Castillo, A. Catinaccio, D. Cauz, D. Cavalli, M. Cavalli Sforza, V. Cavasinni, S. A. Cetin, H. Chen, R. Cherkaoui, L. Chevalier, F. Chevallier, S. Chouridou, M. Ciobotaru, M. Citterio, A. Clark, B. Cleland, M. Cobal, E. Cogneras, P. Conde Muino, M. Consonni, S. Constantinescu, T. Cornelissen, S. Correard, A. Corso Radu, G. Costa, M. J. Costa, D. Costanzo, S. Cuneo, P. Cwetanski, D. Da Silva, M. Dam, M. Dameri, H. O. Danielsson, D. Dannheim, G. Darbo, T. Davidek, K. De, P. O. Defay, B. Dekhissi, J. Del Peso, T. Del Prete, M. Delmastro, F. Derue, L. Di Ciaccio, B. Di Girolamo, S. Dita, F. Dittus, F. Djama, T. Djobava, D. Dobos, M. Dobson, B. A. Dolgoshein, A. Dotti, G. Drake, Z. Drasal, N. Dressnandt, C. Driouchi, J. Drohan, W. L. Ebenstein, P. Eerola, I. Efthymiopoulos, K. Egorov, T. F. Eifert, K. Einsweiler, M. El Kacimi, M. Elsing, D. Emelyanov, C. Escobar, A. I. Etienvre, A. Fabich, K. Facius, A. I. Fakhr-Edine, M. Fanti, A. Farbin, P. Farthouat, D. Fassouliotis, L. Fayard, R. Febbraro, O. L. Fedin, A. Fenyuk, D. Fergusson, P. Ferrari, R. Ferrari, B. C. Ferreira, A. Ferrer, D. Ferrere, G. Filippini, T. Flick, D. Fournier, P. Francavilla, D. Francis, R. Froeschl, D. Froidevaux, E. Fullana, S. Gadomski, G. Gagliardi, P. Gagnon, M. Gallas, B. J. Gallop, S. Gameiro, K. K. Gan, R. Garcia, C. Garcia, I. L. Gavrilenko, C. Gemme, P. Gerlach, N. Ghodbane, V. Giakoumopoulou, V. Giangiobbe, N. Giokaris, G. Glonti, T. Goettfert, T. Golling, N. Gollub, A. Gomes, M. D. Gomez, S. Gonzalez-Sevilla, M. J. Goodrick, G. Gorfine, B. Gorini, D. Goujdami, K-J. Grahn, P. Grenier, N. Grigalashvili, Y. Grishkevich, J. Grosse-Knetter, M. Gruwe, C. Guicheney, A. Gupta, C. Haeberli, R. Haertel, Z. Hajduk, H. Hakobyan, M. Hance, J. D. Hansen, P. H. Hansen, K. Hara, A. Harvey Jr., R. J. Hawkings, F. E. W. Heinemann, A. Henriques Correia, T. Henss, L. Hervas, E. Higon, J. C. Hill, J. Hoffman, J. Y. Hostachy, I. Hruska, F. Hubaut, F. Huegging, W. Hulsbergen, M. Hurwitz, L. Iconomidou-Fayard, E. Jansen, I. Jen-La Plante, P. D. C. Johansson, K. Jon-And, M. Joos, S. Jorgensen, J. Joseph, A. Kaczmarska, M. Kado, A. Karyukhin, M. Kataoka, F. Kayumov, A. Kazarov, P. T. Keener, G. D. Kekelidze, N. Kerschen, S. Kersten, A. Khomich, G. Khoriauli, E. Khramov, A. Khristachev, J. Khubua, T. H. Kittelmann, R. Klingenberg, E. B. Klinkby, P. Kodys, T. Koffas, S. Kolos, S. P. Konovalov, N. Konstantinidis, S. Kopikov, I. Korolkov, V. Kostyukhin, S. Kovalenko, T. Z. Kowalski, K. Krüger, V. Kramarenko, L. G. Kudin, Y. Kulchitsky, C. Lacasta, R. Lafaye, B. Laforge, W. Lampl, F. Lanni, S. Laplace, T. Lari, A-C. Le Bihan, M. Lechowski, F. Ledroit-Guillon, G. Lehmann, R. Leitner, D. Lelas, C. G. Lester, Z. Liang, P. Lichard, W. Liebig, A. Lipniacka, M. Lokajicek, L. Louchard, K. F. Lourerio, A. Lucotte, F. Luehring, B. Lund-Jensen, B. Lundberg, H. Ma, R. Mackeprang, A. Maio, V. P. Maleev, F. Malek, L. Mandelli, J. Maneira, M. Mangin-Brinet, A. Manousakis, L. Mapelli, C. Marques, S. Marti i Garcia, F. Martin, M. Mathes, M. Mazzanti, K. W. McFarlane, R. McPherson, G. Mchedlidze, S. Mehlhase, C. Meirosu, Z. Meng, C. Meroni, V. Mialkovski, B. Mikulec, D. Milstead, I. Minashvili, B. Mindur, V. A. Mitsou, S. Moed, E. Monnier, G. Moorhead, P. Morettini, S. V. Morozov, M. Mosidze, S. V. Mouraviev, E. W. J. Moyse, A. Munar, A. Myagkov, A. V. Nadtochi, K. Nakamura, P. Nechaeva, A. Negri, S. Nemecek, M. Nessi, S. Y. Nesterov, F. M. Newcomer, I. Nikitine, K. Nikolaev, I. Nikolic-Audit, H. Ogren, S. H. Oh, S. B. Oleshko, J. Olszowska, A. Onofre, C. Padilla Aranda, S. Paganis, D. Pallin, D. Pantea, V. Paolone, F. Parodi, J. Parsons, S. Parzhitskiy, E. Pasqualucci, S. M. Passmored, J. Pater, S. Patrichev, M. Peez, V. Perez Reale, L. Perini, V. D. Peshekhonov, J. Petersen, T. C. Petersen, R. Petti, P. W. Phillips, J. Pina, B. Pinto, F. Podlyski, L. Poggioli, A. Poppleton, J. Poveda, P. Pralavorio, L. Pribyl, M. J. Price, D. Prieur, C. Puigdengoles, P. Puzo, O. Røhne, F. Ragusa, S. Rajagopalan, K. Reeves, I. Reisinger, C. Rembser, P. A. Bruckman. de. Renstrom, P. Reznicek, M. Ridel, P. Risso, I. Riu, D. Robinson, C. Roda, S. Roe, O. Rohne, A. Romaniouk, D. Rousseau, A. Rozanov, A. Ruiz, N. Rusakovich, D. Rust, Y. F. Ryabov, V. Ryjov, O. Salto, B. Salvachua, A. Salzburger, H. Sandaker, C. Santamarina Rios, L. Santi, C. Santoni, J. G. Saraiva, F. Sarri, G. Sauvage, L. P. Says, M. Schaefer, V. A. Schegelsky, C. Schiavi, J. Schieck, G. Schlager, J. Schlereth, C. Schmitt, J. Schultes, P. Schwemling, J. Schwindling, J. M. Seixas, D. M. Seliverstov, L. Serin, A. Sfyrla, N. Shalanda, C. Shaw, T. Shin, A. Shmeleva, J. Silva, S. Simion, M. Simonyan, J. E. Sloper, S. Yu. Smirnov, L. Smirnova, C. Solans, A. Solodkov, O. Solovianov, I. Soloviev, V. V. Sosnovtsev, F. Spanó, P. Speckmayer, S. Stancu, R. Stanek, E. Starchenko, A. Straessner, S. I. Suchkov, M. Suk, R. Szczygiel, F. Tarrade, F. Tartarelli, P. Tas, Y. Tayalati, F. Tegenfeldt, R. Teuscher, M. Thioye, V. O. Tikhomirov, C. J. W. P. Timmermans, S. Tisserant, B. Toczek, L. Tremblet, C. Troncon, P. Tsiareshka, M. Tyndel, M. Karagoez. Unel, G. Unal, G. Unel, G. Usai, R. Van Berg, A. Valero, S. Valkar, J. A. Valls, W. Vandelli, F. Vannucci, A. Vartapetian, V. I. Vassilakopoulos, L. Vasilyeva, F. Vazeille, F. Vernocchi, Y. Vetter-Cole, I. Vichou, V. Vinogradov, J. Virzi, I. Vivarelli, J. B. de. Vivie, M. Volpi, T. Vu Anh, C. Wang, M. Warren, J. Weber, M. Weber, A. R. Weidberg, J. Weingarten, P. S. Wells, P. Werner, S. Wheeler, M. Wiessmann, H. Wilkens, H. H. Williams, I. Wingerter-Seez, Y. Yasu, A. Zaitsev, A. Zenin, T. Zenis, Z. Zenonos, H. Zhang, A. Zhelezko, N. Zhou

A new method for calibrating the hadron response of a segmented calorimeter is developed and successfully applied to beam test data. It is based on a principal component analysis of energy deposits in the calorimeter layers, exploiting longitudinal shower development information to improve the measured energy resolution. Corrections for invisible hadronic energy and energy lost in dead material in front of and between the calorimeters of the ATLAS experiment were calculated with simulated Geant4 Monte Carlo events and used to reconstruct the energy of pions impinging on the calorimeters during the 2004 Barrel Combined Beam Test at the CERN H8 area. Read More

In this note we briefly summarize the main future targets and strategies for axion and general low energy particle physics identified in the "3rd axion strategy meeting" held during the AXIONS 2010 workshop. This summary follows a wide discussion with contributions from many of the workshop attendees. Read More

Authors: The ATLAS Collaboration, G. Aad, E. Abat, B. Abbott, J. Abdallah, A. A. Abdelalim, A. Abdesselam, O. Abdinov, B. Abi, M. Abolins, H. Abramowicz, B. S. Acharya, D. L. Adams, T. N. Addy, C. Adorisio, P. Adragna, T. Adye, J. A. Aguilar-Saavedra, M. Aharrouche, S. P. Ahlen, F. Ahles, A. Ahmad, H. Ahmed, G. Aielli, T. Akdogan, T. P. A. Akesson, G. Akimoto, M. S. Alam, M. A. Alam, J. Albert, S. Albrand, M. Aleksa, I. N. Aleksandrov, F. Alessandria, C. Alexa, G. Alexander, G. Alexandre, T. Alexopoulos, M. Alhroob, G. Alimonti, J. Alison, M. Aliyev, P. P. Allport, S. E. Allwood-Spiers, A. Aloisio, R. Alon, A. Alonso, J. Alonso, M. G. Alviggi, K. Amako, P. Amaral, C. Amelung, V. V. Ammosov, A. Amorim, G. Amoros, N. Amram, C. Anastopoulos, C. F. Anders, K. J. Anderson, A. Andreazza, V. Andrei, M-L. Andrieux, X. S. Anduaga, F. Anghinolfi, A. Antonaki, M. Antonelli, S. Antonelli, B. Antunovic, F. A. Anulli, G. Arabidze, I. Aracena, Y. Arai, A. T. H. Arce, J. P. Archambault, S. Arfaoui, J-F. Arguin, T. Argyropoulos, E. Arik, M. Arik, A. J. Armbruster, O. Arnaez, C. Arnault, A. Artamonov, D. Arutinov, M. Asai, S. Asai, S. Ask, B. Asman, D. Asner, L. Asquith, K. Assamagan, A. Astbury, A. Astvatsatourov, T. Atkinson, G. Atoian, B. Auerbach, E. Auge, K. Augsten, M. A. Aurousseau, N. Austin, G. Avolio, R. Avramidou, A. Axen, C. Ay, G. Azuelos, Y. Azuma, M. A. Baak, G. Baccaglioni, C. Bacci, H. Bachacou, K. Bachas, M. Backes, E. Badescu, P. Bagnaia, Y. Bai, D. C. Bailey, J. T. Baines, O. K. Baker, F. Baltasar Dos Santos Pedrosa, E. Banas, S. Banerjee, D. Banfi, A. Bangert, V. Bansal, S. P. Baranov, S. Baranov, A. Barashkou, T. B. Barber, E. L. Barberio, D. Barberis, M. B. Barbero, D. Y. Bardin, T. Barillari, M. Barisonzi, T. Barklow, N. B. Barlow, B. M. Barnett, R. M. Barnett, S. Baron, A. Baroncelli, A. J. Barr, F. Barreiro, J. Barreiro Guimaraes da Costa, P. Barrillon, R. Bartoldus, D. Bartsch, J. Bastos, R. L. Bates, J. R. Batley, A. Battaglia, M. Battistin, F. Bauer, M. Bazalova, B. Beare, P. H. Beauchemin, R. B. Beccherle, N. Becerici, P. Bechtle, G. A. Beck, H. P. Beck, M. Beckingham, K. H. Becks, I. Bedajanek, A. J. Beddall, A. Beddall, P. Bednar, V. A. Bednyakov, C. Bee, S. Behar Harpaz, P. K. Behera, M. Beimforde, C. Belanger-Champagne, P. J. Bell, W. H. Bell, G. Bella, L. Bellagamba, F. Bellina, M. Bellomo, A. Belloni, K. Belotskiy, O. Beltramello, S. Ben Ami, O. Benary, D. Benchekroun, M. Bendel, B. H. Benedict, N. Benekos, Y. Benhammou, G. P. Benincasa, D. P. Benjamin, M. Benoit, J. R. Bensinger, K. Benslama, S. Bentvelsen, M. Beretta, D. Berge, E. Bergeaas Kuutmann, N. Berger, F. Berghaus, E. Berglund, J. Beringer, K. Bernardet, P. Bernat, R. Bernhard, C. Bernius, T. Berry, A. Bertin, N. Besson, S. Bethke, R. M. Bianchi, M. Bianco, O. Biebel, J. Biesiada, M. Biglietti, H. Bilokon, S. Binet, A. Bingul, C. Bini, C. Biscarat, M. Bischofberger, U. Bitenc, K. M. Black, R. E. Blair, G. Blanchot, C. Blocker, J. Blocki, A. Blondel, W. Blum, U. Blumenschein, C. Boaretto, G. J. Bobbink, A. Bocci, B. Bodine, J. Boek, N. Boelaert, S. Boeser, J. A. Bogaerts, A. Bogouch, C. Bohm, J. Bohm, V. Boisvert, T. Bold, V. Boldea, V. G. Bondarenko, M. Bondioli, M. Boonekamp, C. N. Booth, P. S. L. Booth, J. R. A. Booth, A. Borisov, G. Borissov, I. Borjanovic, S. Borroni, K. Bos, D. Boscherini, M. Bosman, M. Bosteels, H. Boterenbrood, J. Bouchami, J. Boudreau, E. V. Bouhova-Thacker, C. Boulahouache, C. Bourdarios, J. Boyd, I. R. Boyko, A. Braem, P. Branchini, G. W. Brandenburg, A. Brandt, O. Brandt, U. Bratzler, J. E. Brau, H. M. Braun, B. Brelier, J. Bremer, R. Brenner, S. Bressler, D. Breton, N. D. Brett, D. Britton, F. M. Brochu, I. Brock, R. Brock, E. Brodet, F. Broggi, G. Brooijmans, W. K. Brooks, E. Brubaker, P. A. Bruckman de Renstrom, D. Bruncko, R. Bruneliere, S. Brunet, A. Bruni, G. Bruni, M. Bruschi, T. Buanes, F. B. Bucci, P. Buchholz, A. G. Buckley, I. A. Budagov, V. Buescher, L. Bugge, F. Bujor, O. Bulekov, M. Bunse, T. Buran, H. Burckhart, S. Burdin, S. Burke, E. Busato, C. P. Buszello, F. Butin, B. Butler, J. M. Butler, C. M. Buttar, J. M. Butterworth, T. Byatt, S. Cabrera Urban, D. Caforio, O. Cakir, P. Calafiura, G. Calderini, R. Calkins, L. P. Caloba, R. Caloi, D. Calvet, P. Camarri, M. Cambiaghi, D. Cameron, F. Campabadal Segura, S. Campana, M. Campanelli, V. Canale, J. Cantero, M. D. M. Capeans Garrido, I. Caprini, M. Caprini, M. Capua, R. Caputo, C. Caramarcu, R. Cardarelli, T. Carli, G. Carlino, L. Carminati, B. Caron, S. Caron, S. Carron Montero, A. A. Carter, J. R. Carter, J. Carvalho, D. Casadei, M. P. Casado, M. Cascella, C. Caso, A. M. Castaneda Hernadez, E. Castaneda Miranda, V. Castillo Gimenez, N. F. Castro, G. Cataldi, A. Catinaccio, J. R. Catmore, A. Cattai, G. Cattani, S. Caughron, D. Cauz, P. Cavalleri, D. Cavalli, M. Cavalli-Sforza, V. Cavasinni, A. Cazzato, F. Ceradini, A. S. Cerqueira, A. Cerri, L. Cerrito, F. Cerutti, S. A. Cetin, F. Cevenini, A. C. Chafaq, D. Chakraborty, J. D. Chapman, J. W. Chapman, E. C. Chareyre, D. G. Charlton, S. C. Chatterjii, S. Cheatham, S. Chekanov, S. V. Chekulaev, G. A. Chelkov, H. Chen, T. Chen, X. Chen, S. Cheng, T. L. Cheng, A. Cheplakov, V. F. Chepurnov, R. Cherkaoui El Moursli, V. Tcherniatine, D. Chesneanu, E. Cheu, S. L. Cheung, L. Chevalier, F. Chevallier, V. Chiarella, G. Chiefari, L. Chikovani, J. T. Childers, A. Chilingarov, G. Chiodini, S. Chouridou, D. Chren, I. A. Christidi, A. Christov, D. Chromek-Burckhart, M. L. Chu, J. Chudoba, G. Ciapetti, A. K. Ciftci, R. Ciftci, V. Cindro, M. D. Ciobotaru, C. Ciocca, A. Ciocio, M. Cirilli, M. Citterio, A. Clark, W. Cleland, J. C. Clemens, B. Clement, C. Clement, D. Clements, Y. Coadou, M. Cobal, A. Coccaro, J. Cochran, S. Coelli, J. Coggeshall, E. Cogneras, C. D. Cojocaru, J. Colas, B. Cole, A. P. Colijn, C. Collard, N. J. Collins, C. Collins-Tooth, J. Collot, G. Colon, R. Coluccia, P. Conde Muino, E. Coniavitis, M. Consonni, S. Constantinescu, C. Conta, F. Conventi, J. Cook, M. Cooke, B. D. Cooper, N. J. Cooper-Smith, K. Copic, T. Cornelissen, M. Corradi, F. C. Corriveau, A. Corso-Radu, A. Cortes-Gonzalez, G. Costa, M. J. Costa, D. Costanzo, T. Costin, D. Cote, R. Coura Torres, L. Courneyea, G. Cowan, C. C. Cowden, B. E. Cox, K. Cranmer, J. Cranshaw, M. Cristinziani, G. Crosetti, R. C. Crupi, S. Crepe-Renaudin, C. -M. Cuciuc, C. Cuenca Almenar, M. Curatolo, C. J. Curtis, P. Cwetanski, Z. Czyczula, S. D'Auria, M. D'Onofrio, A. D'Orazio, A. Da Rocha Gesualdi Mello, P. V. M. Da Silva, C. V. Da Via, W. Dabrowski, T. Dai, C. Dallapiccola, S. J. Dallison, C. H. Daly, M. Dam, H. O. Danielsson, D. Dannheim, V. Dao, G. Darbo, W. D. Davey, T. Davidek, N. Davidson, R. Davidson, A. R. Davison, I. Dawson, J. W. Dawson, R. K. Daya, K. De, R. de Asmundis, S. De Castro, P. E. De Castro Faria Salgado, S. De Cecco, N. De Groot, P. de Jong, E. De La Cruz-Burelo, C. De La Taille, L. De Mora, M. De Oliveira Branco, D. De Pedis, A. De Salvo, U. 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Nikolopoulos, H. Nilsen, P. Nilsson, A. Nisati, R. Nisius, L. J. Nodulman, M. Nomachi, I. Nomidis, H. Nomoto, M. Nordberg, D. Notz, J. Novakova, M. Nozaki, M. Nozicka, A. -E. Nuncio-Quiroz, G. Nunes Hanninger, T. Nunnemann, S. W. O'Neale, D. C. O'Neil, V. O'Shea, F. G. Oakham, H. Oberlack, A. Ochi, S. Odaka, G. A. Odino, H. Ogren, S. H. Oh, T. Ohshima, H. Ohshita, T. Ohsugi, S. Okada, H. Okawa, Y. Okumura, M. Olcese, A. G. Olchevski, M. Oliveira, D. Oliveira Damazio, J. Oliver, E. O. Oliver Garcia, D. Olivito, A. Olszewski, J. Olszowska, C. Omachi, A. Onea, A. Onofre, C. J. Oram, G. Ordonez, M. J. Oreglia, Y. Oren, D. Orestano, I. O. Orlov, R. S. Orr, E. O. Ortega, B. Osculati, C. Osuna, R. Otec, F. Ould-Saada, A. Ouraou, Q. Ouyang, O. K. Oye, V. E. Ozcan, K. Ozone, N. Ozturk, A. Pacheco Pages, S. Padhi, C. Padilla Aranda, E. Paganis, F. Paige, K. Pajchel, A. Pal, S. Palestini, J. Palla, D. Pallin, A. Palma, Y. B. Pan, E. Panagiotopoulou, B. Panes, N. Panikashvili, S. Panitkin, D. Pantea, M. Panuskova, V. Paolone, Th. D. Papadopoulou, W. Park, M. A. Parker, S. Parker, F. Parodi, J. A. Parsons, U. Parzefall, E. Pasqualucci, G. Passardi, A. Passeri, F. Pastore, Fr. Pastore, S. Pataraia, J. R. Pater, S. Patricelli, P. Patwa, T. Pauly, L. S. Peak, M. Pecsy, M. I. Pedraza Morales, S. V. Peleganchuk, H. Peng, R. Pengo, J. Penwell, M. Perantoni, A. Pereira, K. Perez, E. Perez Codina, V. Perez Reale, L. Perini, H. Pernegger, R. Perrino, P. Perrodo, P. Perus, V. D. Peshekhonov, B. A. Petersen, J. Petersen, T. C. Petersen, C. Petridou, E. Petrolo, F. Petrucci, R. Petti, R. Pezoa, M. Pezzetti, B. Pfeifer, A. Phan, A. W. Phillips, G. Piacquadio, M. Piccinini, R. Piegaia, S. Pier, J. E. Pilcher, A. D. Pilkington, J. Pina, J. L. Pinfold, J. Ping, B. Pinto, O. Pirotte, C. Pizio, R. Placakyte, M. Plamondon, W. G. Plano, M. -A. Pleier, A. Poblaguev, F. Podlyski, P. Poffenberger, L. Poggioli, M. Pohl, F. Polci, G. Polesello, A. Policicchio, A. Polini, J. P. Poll, V. 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Reljic, C. Rembser, Z. Ren, P. Renkel, S. Rescia, M. Rescigno, S. Resconi, B. Resende, E. Rezaie, P. Reznicek, A. Richards, R. A. Richards, R. Richter, E. Richter-Was, M. Ridel, S. Rieke, M. Rijpstra, M. Rijssenbeek, A. Rimoldi, R. R. Rios, C. Risler, I. Riu, G. Rivoltella, F. Rizatdinova, K. Roberts, S. H. Robertson, A. Robichaud-Veronneau, D. Robinson, A. Robson, J. G. Rocha de Lima, C. Roda, D. Rodriguez, Y. Rodriguez, S. Roe, O. Rohne, V. Rojo, S. Rolli, A. Romaniouk, V. M. Romanov, G. Romeo, D. Romero, L. Roos, E. Ros, S. Rosati, G. A. Rosenbaum, E. I. Rosenberg, L. Rosselet, L. P. Rossi, M. Rotaru, J. Rothberg, I. Rottlaender, D. Rousseau, C. R. Royon, A. Rozanov, Y. Rozen, B. Ruckert, N. Ruckstuhl, V. I. Rud, G. Rudolph, F. Ruehr, F. Ruggieri, A. Ruiz-Martinez, V. Rumiantsev, L. Rumyantsev, N. A. Rusakovich, D. R. Rust, J. P. Rutherfoord, C. Ruwiedel, P. Ruzicka, Y. F. Ryabov, V. Ryadovikov, P. Ryan, A. M. Rybin, G. Rybkin, S. Rzaeva, A. F. Saavedra, H. F-W. Sadrozinski, R. 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A detailed study is presented of the expected performance of the ATLAS detector. The reconstruction of tracks, leptons, photons, missing energy and jets is investigated, together with the performance of b-tagging and the trigger. The physics potential for a variety of interesting physics processes, within the Standard Model and beyond, is examined. Read More

We report on the first results of a search for optical-wavelength photons mixing with hypothetical hidden-sector paraphotons in the mass range between 10^-5 and 10^-2 electron volts for a mixing parameter greater than 10^-7. This was a generation-regeneration experiment using the "light shining through a wall" technique in which regenerated photons are searched for downstream of an optical barrier that separates it from an upstream generation region. The new limits presented here are approximately three times more sensitive to this mixing than the best previous measurement. Read More

Cross sections for the reaction ${^1}$H($e,e'\pi^+$)$n$ were measured in Hall C at Thomas Jefferson National Accelerator Facility (JLab) using the CEBAF high-intensity, continous electron beam in order to determine the charged pion form factor. Data were taken for central four-momentum transfers ranging from $Q^2$=0.60 to 2. Read More

The charged pion form factor, Fpi(Q^2), is an important quantity which can be used to advance our knowledge of hadronic structure. However, the extraction of Fpi from data requires a model of the 1H(e,e'pi+)n reaction, and thus is inherently model dependent. Therefore, a detailed description of the extraction of the charged pion form factor from electroproduction data obtained recently at Jefferson Lab is presented, with particular focus given to the dominant uncertainties in this procedure. Read More

We report on the first results of a sensitive search for scalar coupling of photons to a light neutral boson in the mass range of approximately 1.0 milli-electron volts and coupling strength greater than 10$^-6$ GeV$^-1$ using optical photons. This was a photon regeneration experiment using the "light shining through a wall" technique in which laser light was passed through a strong magnetic field upstream of an optical beam dump; regenerated laser light was then searched for downstream of a second magnetic field region optically shielded from the former. Read More

Affiliations: 1Hampton University, 2Hampton University, 3Hampton University, 4Jefferson Lab, 5Jefferson Lab, 6Jefferson Lab

The PVLAS collaboration has observed rotation of the plane of polarization of light passing through a magnetic field in vacuum and has proposed that the effect is due to interaction of photons with very light spin-zero bosons. This would represent new physics beyond the Standard Model, and hence it is of high interest to test this hypothesis. We describe a proposed test of the PVLAS result, and ways of producing, detecting, and studying such bosons with light in the optical frequency range. Read More

We report on a detailed study of longitudinal strength in the nucleon resonance region, presenting new results from inclusive electron-proton cross sections measured at Jefferson Lab Hall C in the four-momentum transfer range 0.2 < Q^2 < 5.5 GeV^2. Read More

X-ray scanners for gain mapping of ATLAS Barrel Transition Radiation Tracker (TRT) modules were developed at Hampton University for quality assurance purposes. Gas gain variations for each straw of the TRT modules were used to decide whether wires should be removed or restrung, and to evaluate overall module quality. Read More

A pioneering experiment in Lambda hypernuclear spectroscopy, undertaken at the Thomas Jefferson National Accelerator Facility (Jlab), was recently reported. The experiment used the high- precision, continuous electron beam at Jlab, and a special arrangement of spectrometer magnets to measure the spectrum from {nat}C and 7Li targets using the (e,e' K+)reaction. The 12B hypernuclear spectrum was previously published. Read More

We have carried out an (e,e'p) experiment at high momentum transfer and in parallel kinematics to measure the strength of the nuclear spectral function S(k,E) at high nucleon momenta k and large removal energies E. This strength is related to the presence of short-range and tensor correlations, and was known hitherto only indirectly and with considerable uncertainty from the lack of strength in the independent-particle region. This experiment confirms by direct measurement the correlated strength predicted by theory. Read More

Inclusive electron scattering data are presented for ^2H and Fe targets at an incident electron energy of 4.045 GeV for a range of momentum transfers from Q^2 = 1 to 7 (GeV/c)^2. Data were taken at Jefferson Laboratory for low values of energy loss, corresponding to values of Bjorken x greater than or near 1. Read More