Deep exclusive π+ electroproduction off the proton at CLAS
K. ParkThomas Jefferson National Accelerator Facility, 23606, Newport News, Virginia, USAM. GuidalInstitut de Physique Nucléaire ORSAY, Orsay, FranceR. W. GotheUniversity of South Carolina, 29208, Columbia, South Carolina, USAJ.M. LagetThomas Jefferson National Accelerator Facility, 23606, Newport News, Virginia, USAM. GarçonCEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191, Gif-sur-Yvette, FranceK. P. AdhikariOld Dominion University, 23529, Norfolk, Virginia, USAM. AghasyanINFN, Laboratori Nazionali di Frascati, 00044, Frascati, ItalyM. J. AmaryanOld Dominion University, 23529, Norfolk, Virginia, USAM. AnghinolfiINFN, Sezione di Genova, 16146, Genova, ItalyH. AvakianThomas Jefferson National Accelerator Facility, 23606, Newport News, Virginia, USAH. BaghdasaryanUniversity of Virginia, 22901, Charlottesville, Virginia, USAJ. BallCEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191, Gif-sur-Yvette, FranceN. A. BaltzellArgonne National Laboratory, 60439, Argonne, Illinois, USAM. BattaglieriINFN, Sezione di Genova, 16146, Genova, ItalyIvan BedlinskyInstitute of Theoretical and Experimental Physics, 117259, Moscow, RussiaR. BennettOld Dominion University, 23529, Norfolk, Virginia, USAA. S. BiselliFairfield University, 06824, Fairfield, Connecticut, USAC. BookwalterFlorida State University, 32306, Tallahassee, Florida, USAS. BoiarinovThomas Jefferson National Accelerator Facility, 23606, Newport News, Virginia, USAW. J. BriscoeThe George Washington University, 20052, Washington, D.C., USAW. K. BrooksThomas Jefferson National Accelerator Facility, 23606, Newport News, Virginia, USAVolker BurkertThomas Jefferson National Accelerator Facility, 23606, Newport News, Virginia, USAD. S. CarmanThomas Jefferson National Accelerator Facility, 23606, Newport News, Virginia, USAA. CelentanoINFN, Sezione di Genova, 16146, Genova, ItalyS. ChandavarOhio University, 45701, Athens, Ohio, USAG. CharlesCEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191, Gif-sur-Yvette, FranceM. ContalbrigoINFN, Sezione di Ferrara, 44100, Ferrara, ItalyV. CredéFlorida State University, 32306, Tallahassee, Florida, USAA. D’AngeloUniversità di Roma Tor Vergata, 00133, Rome, ItalyA. V. DanielOhio University, 45701, Athens, Ohio, USAN. DashyanYerevan Physics Institute, 375036, Yerevan, ArmeniaR. De VitaINFN, Sezione di Genova, 16146, Genova, ItalyE. De SanctisINFN, Laboratori Nazionali di Frascati, 00044, Frascati, ItalyA. DeurThomas Jefferson National Accelerator Facility, 23606, Newport News, Virginia, USAC. DjalaliUniversity of South Carolina, 29208, Columbia, South Carolina, USAG. E. DodgeOld Dominion University, 23529, Norfolk, Virginia, USAD. DoughtyChristopher Newport University, 23606, Newport News, Virginia, USAR. DupréCEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191, Gif-sur-Yvette, FranceH. EgiyanThomas Jefferson National Accelerator Facility, 23606, Newport News, Virginia, USAA. El AlaouiArgonne National Laboratory, 60439, Argonne, Illinois, USAL. El FassiArgonne National Laboratory, 60439, Argonne, Illinois, USAP. EugenioFlorida State University, 32306, Tallahassee, Florida, USAG. FedotovUniversity of South Carolina, 29208, Columbia, South Carolina, USAS. FeganUniversity of Glasgow, G12 8QQ, Glasgow, UKJ. A. FlemingEdinburgh University, EH9 3JZ, Edinburgh, UKT. A. ForestIdaho State University, 83209, Pocatello, Idaho, USAA. FradiInstitut de Physique Nucléaire ORSAY, Orsay, FranceN. GevorgyanYerevan Physics Institute, 375036, Yerevan, ArmeniaG. P. GilfoyleUniversity of Richmond, 23173, Richmond, Virginia, USAK. L. GiovanettiJames Madison University, 22807, Harrisonburg, Virginia, USAF. X. GirodThomas Jefferson National Accelerator Facility, 23606, Newport News, Virginia, USAW. GohnUniversity of Connecticut, 06269, Storrs, Connecticut, USAE. GolovatchL. GrahamUniversity of South Carolina, 29208, Columbia, South Carolina, USAK. A. GriffioenCollege of William and Mary, 23187-8795, Williamsburg, Virginia, USAB. GueganInstitut de Physique Nucléaire ORSAY, Orsay, FranceL. GuoFlorida International University, 33199, Miami, Florida, USAK. HafidiArgonne National Laboratory, 60439, Argonne, Illinois, USAH. HakobyanUniversidad Técnica Federico Santa María, Casilla 110-V, Valparaíso, ChileC. HanrettyUniversity of Virginia, 22901, Charlottesville, Virginia, USAD. HeddleChristopher Newport University, 23606, Newport News, Virginia, USAK. HicksOhio University, 45701, Athens, Ohio, USAD. HoCarnegie Mellon University, 15213, Pittsburgh, Pennsylvania, USAM. HoltropUniversity of New Hampshire, 03824-3568, Durham, New Hampshire, USAY. IlievaThe George Washington University, 20052, Washington, D.C., USAD. G. IrelandUniversity of Glasgow, G12 8QQ, Glasgow, UKБ. С. ИшхановD. JenkinsVirginia Polytechnic Institute, State University, 24061-0435, Blacksburg, Virginia, USAH. S. JoInstitut de Physique Nucléaire ORSAY, Orsay, FranceD. KellerUniversity of Virginia, 22901, Charlottesville, Virginia, USAM. KhandakerNorfolk State University, 23504, Norfolk, Virginia, USAP. KhetarpalFlorida International University, 33199, Miami, Florida, USAA. KimKyungpook National University, 702-701, Daegu, Republic of KoreaW. KimKyungpook National University, 702-701, Daegu, Republic of KoreaF. J. KleinCatholic University of America, 20064, Washington, D.C., USAS. KoiralaOld Dominion University, 23529, Norfolk, Virginia, USAA. KubarovskyRensselaer Polytechnic Institute, 12180-3590, Troy, New York, USAV. KubarovskyThomas Jefferson National Accelerator Facility, 23606, Newport News, Virginia, USAS. E. KuhnOld Dominion University, 23529, Norfolk, Virginia, USAS. KuleshovInstitute of Theoretical and Experimental Physics, 117259, Moscow, RussiaK. LivingstonUniversity of Glasgow, G12 8QQ, Glasgow, UKH. Y. LuCarnegie Mellon University, 15213, Pittsburgh, Pennsylvania, USAI. J. D. MacGregorUniversity of Glasgow, G12 8QQ, Glasgow, UKY. MaoUniversity of South Carolina, 29208, Columbia, South Carolina, USAN. MarkovUniversity of Connecticut, 06269, Storrs, Connecticut, USAD. MartinezIdaho State University, 83209, Pocatello, Idaho, USAM. MayerOld Dominion University, 23529, Norfolk, Virginia, USAB. McKinnonUniversity of Glasgow, G12 8QQ, Glasgow, UKC. A. MeyerCarnegie Mellon University, 15213, Pittsburgh, Pennsylvania, USAT. MineevaUniversity of Connecticut, 06269, Storrs, Connecticut, USAM. MirazitaINFN, Laboratori Nazionali di Frascati, 00044, Frascati, ItalyV. MokeevSkobeltsyn Nuclear Physics Institute, Skobeltsyn Nuclear Physics Institute, 119899, Moscow, RussiaH. MoutardeCEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191, Gif-sur-Yvette, FranceE. MunévarThomas Jefferson National Accelerator Facility, 23606, Newport News, Virginia, USAC. Muñoz CamachoInstitut de Physique Nucléaire ORSAY, Orsay, FranceP. Nadel-TurońskiThomas Jefferson National Accelerator Facility, 23606, Newport News, Virginia, USAC. S. NepaliOld Dominion University, 23529, Norfolk, Virginia, USAS. NiccolaiInstitut de Physique Nucléaire ORSAY, Orsay, FranceG. NiculescuJames Madison University, 22807, Harrisonburg, Virginia, USAI. NiculescuJames Madison University, 22807, Harrisonburg, Virginia, USA
2013en
ABI
Аннотация
The exclusive electroproduction of π + above the resonance region was studied using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Laboratory by scattering a 6GeV continuous electron beam off a hydrogen target. The large acceptance and good resolution of CLAS, together with the high luminosity, allowed us to measure the cross section for the γ * p → nπ + process in 140 (Q 2, x B , t) bins: 0.16 < x B < 0.58, 1.6 GeV2 < Q 2 < 4.5 GeV2 and 0.1 GeV2 < −t < 5.3 GeV2. For most bins, the statistical accuracy is on the order of a few percent. Differential cross sections are compared to four theoretical models, based either on hadronic or on partonic degrees of freedom. The four models can describe the gross features of the data reasonably well, but differ strongly in their ingredients. In particular, the model based on Generalized Parton Distributions (GPDs) contain the interesting potential to experimentally access transversity GPDs.
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