Scaling Tests of the Cross Section for Deeply Virtual Compton Scattering
C. Muñoz CamachoCEA Saclay, DAPNIA/SPhN, F-91191 Gif-sur-Yvette, FranceA. CamsonneUniversité Blaise Pascal/CNRS-IN2P3, F-63177 Aubière, FranceM. MazouzLaboratoire de Physique Subatomique et de Cosmologie, 38026 Grenoble, FranceC. FerdiUniversité Blaise Pascal/CNRS-IN2P3, F-63177 Aubière, FranceG. GavalianOld Dominion University, Norfolk, Virginia 23508, USAE. KuchinaRutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USAM. AmarianOld Dominion University, Norfolk, Virginia 23508, USAK. AniolCalifornia State University, Los Angeles, Los Angeles, California 90032, USAMatthieu BeaumelCEA Saclay, DAPNIA/SPhN, F-91191 Gif-sur-Yvette, FranceH. BenaoumSyracuse University, Syracuse, New York 13244, USAP.Y. BertinThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAM. BrossardUniversité Blaise Pascal/CNRS-IN2P3, F-63177 Aubière, FranceJ.-P. ChenThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAE. ChudakovThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAB. CraverUniversity of Virginia, Charlottesville, Virginia 22904, USAF. CusannoINFN/Sezione Sanità, 00161 Roma, ItalyC. W. de JagerThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAA. DeurThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAR. J. FeuerbachThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAJ.-M. FieschiUniversité Blaise Pascal/CNRS-IN2P3, F-63177 Aubière, FranceS. FrullaniINFN/Sezione Sanità, 00161 Roma, ItalyM. GarçonCEA Saclay, DAPNIA/SPhN, F-91191 Gif-sur-Yvette, FranceF. GaribaldiINFN/Sezione Sanità, 00161 Roma, ItalyO. GayouMassachusetts Institute of Technology, Cambridge, Massachusetts 02139, USAR. GilmanRutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USAJ. GómezThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAP. GuèyeHampton University, Hampton, Virginia 23668, USAP.A.M. GuichonCEA Saclay, DAPNIA/SPhN, F-91191 Gif-sur-Yvette, FranceB. GuillonLaboratoire de Physique Subatomique et de Cosmologie, 38026 Grenoble, FranceO. HansenThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USADavid HayesOld Dominion University, Norfolk, Virginia 23508, USAD. W. HiginbothamThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAT. HolmstromCollege of William and Mary, Williamsburg, Virginia 23187, USAC. E. Hyde-WrightOld Dominion University, Norfolk, Virginia 23508, USAH. IbrahimOld Dominion University, Norfolk, Virginia 23508, USAR. IgarashiUniversity of Saskatchewan, Saskatchewan, Saskatchewan, Canada, S7N 5C6X. S. JiangRutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USAH. S. JoInstitut de Physique Nucléaire CNRS-IN2P3, Orsay, FranceL. J. KaufmanUniversity of Massachusetts Amherst, Amherst, Massachusetts 01003, USAA. KelleherCollege of William and Mary, Williamsburg, Virginia 23187, USAA. KolarkarUniversity of Kentucky, Lexington, Kentucky 40506, USAG. KumbartzkiRutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USAG. LaveissièreUniversité Blaise Pascal/CNRS-IN2P3, F-63177 Aubière, FranceJ. J. LeRoseThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAR. LindgrenUniversity of Virginia, Charlottesville, Virginia 22904, USAN. LiyanageUniversity of Virginia, Charlottesville, Virginia 22904, USAH. J. LüDepartment of Modern Physics, University of Science and Technology of China, Hefei 230026, ChinaD. J. MargaziotisCalifornia State University, Los Angeles, Los Angeles, California 90032, USAZ.-E. MezianiTemple University, Philadelphia, Pennsylvania 19122, USAK. McCormickRutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USAR. MichaelsThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAB. MichelUniversité Blaise Pascal/CNRS-IN2P3, F-63177 Aubière, FranceB. MoffitCollege of William and Mary, Williamsburg, Virginia 23187, USAPeter MonaghanMassachusetts Institute of Technology, Cambridge, Massachusetts 02139, USAS. NandaThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAV. NelyubinUniversity of Virginia, Charlottesville, Virginia 22904, USAM. PotokarInstitut Jozef Stefan, University of Ljubljana, Ljubljana, SloveniaY. QiangMassachusetts Institute of Technology, Cambridge, Massachusetts 02139, USAR. D. RansomeRutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USAJ. S. RéalLaboratoire de Physique Subatomique et de Cosmologie, 38026 Grenoble, FranceB. ReitzThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAY. RoblinThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAJ. RocheThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAF. SabatiéCEA Saclay, DAPNIA/SPhN, F-91191 Gif-sur-Yvette, FranceA. SahaThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAS. ŠircaInstitut Jozef Stefan, University of Ljubljana, Ljubljana, SloveniaK. SliferUniversity of Virginia, Charlottesville, Virginia 22904, USAP. SolvignonTemple University, Philadelphia, Pennsylvania 19122, USAR. SubediKent State University, Kent, Ohio 44242, USAV. SulkoskyCollege of William and Mary, Williamsburg, Virginia 23187, USAP. UlmerOld Dominion University, Norfolk, Virginia 23508, USAE. VoutierLaboratoire de Physique Subatomique et de Cosmologie, 38026 Grenoble, FranceK. WangUniversity of Virginia, Charlottesville, Virginia 22904, USAL. B. WeinsteinOld Dominion University, Norfolk, Virginia 23508, USAB. WojtsekhowskiThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAXiaochao ZhengArgonne National Laboratory, Argonne, Illinois, 60439, USAL. ZhuUniversity of Illinois, Urbana, Illinois 61801, USA
2006en
ABI
Annotatsiya
We present the first measurements of the $\stackrel{\ensuremath{\rightarrow}}{e}p\ensuremath{\rightarrow}ep\ensuremath{\gamma}$ cross section in the deeply virtual Compton scattering (DVCS) regime and the valence quark region. The ${Q}^{2}$ dependence (from 1.5 to $2.3\text{ }\text{ }{\mathrm{GeV}}^{2}$) of the helicity-dependent cross section indicates the twist-2 dominance of DVCS, proving that generalized parton distributions (GPDs) are accessible to experiment at moderate ${Q}^{2}$. The helicity-independent cross section is also measured at ${Q}^{2}=2.3\text{ }\text{ }{\mathrm{GeV}}^{2}$. We present the first model-independent measurement of linear combinations of GPDs and GPD integrals up to the twist-3 approximation.
Hali tarjima qilinmagan
Identifikatorlar
Iqtiboslar va manbalar
2 ta iqtibos0 ta foydalanilgan manba