6533b852fe1ef96bd12ab917
RESEARCH PRODUCT
Virtual Compton Scattering and Neutral Pion Electroproduction in the Resonance Region up to the Deep Inelastic Region at Backward Angles
Seigo KatoH. UenoK. WijesooriyaR. Di SalvoL. C. AlexaG. W. MillerH. VoskanyanC. JutierC. JutierJ. JardillierE. VoutierJ. A. TemplonG. RutledgeB. FroisD. G. ZaineaC. C. ChangE. ChudakovDavid L. ProutG. LaveissièreT. TerasawaVincent BretonMauro IodiceBogdan WojtsekhowskiK. S. KumarLatifa ElouadrhiriJ. O. HansenA. GasparianA. GasparianK. ArundellPavel SorokinSebastien IncertiLarry WeinsteinP. GrenierR. W. LourieW. KahlJ. BerthotG. AuditL. B. AuerbachT. PussieuxG. FournierWilliam BertozziA. DeurA. DeurP. VerninPierre A.m. GuichonRonald RansomeKazushige MaedaK. KinoN. DegrandePete MarkowitzD. RowntreeZ. PapandreouR. L.j. Van Der MeerR. L.j. Van Der MeerA. T. KatramatouT. SaitoRichard MadeyPaul SouderP. M. RuttS. K. NandaRoberto PerrinoR. De LeoD. S. DaleS. MehrabyanS. KerhoasJ. M. FinnW. U. BoeglinD. J. MargaziotisR. I. PomatsalyukA. KetikyanL. TodorA. LeoneM. BaylacS. JaminionNilanga LiyanageS. MalovE. BurtinM. HoltropThomas E. SmithRichard WilsonG. E. DodgeR. HolmesJ. MarroncleD. MarchandE. Tomasi-gustaffsonS. PlatchkovJ. S. RealJ. MartinoRaphael Noel TieulentG.i. SmirnovJ. P. ChenR. Van De VyverG. M. UrciuoliBranislav VlahovicBranislav VlahovicR. A. LindgrenJ. J. LeroseC. R. HowellJustin I. McintyreJ. R. CalarcoL. TiatorL. BimbotArijit SahaK. SoldiO. RavelHiroaki TsubotaA. SerdarevicA. SerdarevicC. E. HydeC. E. HydeY. RoblinJ. Y. MougeyG. M. HuberF. GaribaldiE. CisbaniJ. GomezV. GorbenkoJ. W. WatsonF. RenardL. CardmanB. D. AndersonG. J. LolosM. B. EpsteinF. T. BakerF. MerchezP. Y. BertinHaiyan GaoM. LiangG. QuéménerG. QuéménerD. NeyretN. D'hoseS. FrullaniCharles GlashausserM. KhayatH. BreuerD. M. ManleyJ. GaoL. Van HoorebekeG. G. PetratosZ. E. MezianiV. A. PunjabiL. A. EwellRonald GilmanRonald GilmanK. MccormickH. FonvieilleZ. L. ZhouA. V. GlamazdinS. KoxJing ZhaoC. F. PerdrisatR. MichaelsC. MarchandM. K. JonesC. FurgetP. E. UlmerKevin FissumM. KussJames J. KellyE. J. BrashLaird KramerShalev GiladC. W. De JagerK. A. AniolE. A.j.m. OffermannC. CavataS.s. KamalovG. J. KumbartzkiA. J. SartyW. M. ZhangR. SuleimanJ. Domingosubject
Elastic scatteringPhysicsNuclear and High Energy PhysicsParticle physics010308 nuclear & particles physicsScatteringCompton scatteringResonanceFOS: Physical sciencesInelastic scattering[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]Deep inelastic scattering01 natural sciencesHigh Energy Physics - ExperimentNuclear physicsHigh Energy Physics - Experiment (hep-ex)Pion0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Nuclear Experiment (nucl-ex)010306 general physicsNucleonNuclear Experimentdescription
We have made the first measurements of the virtual Compton scattering (VCS) process via the H$(e,e'p)\gamma$ exclusive reaction in the nucleon resonance region, at backward angles. Results are presented for the $W$-dependence at fixed $Q^2=1$ GeV$^2$, and for the $Q^2$-dependence at fixed $W$ near 1.5 GeV. The VCS data show resonant structures in the first and second resonance regions. The observed $Q^2$-dependence is smooth. The measured ratio of H$(e,e'p)\gamma$ to H$(e,e'p)\pi^0$ cross sections emphasizes the different sensitivity of these two reactions to the various nucleon resonances. Finally, when compared to Real Compton Scattering (RCS) at high energy and large angles, our VCS data at the highest $W$ (1.8-1.9 GeV) show a striking $Q^2$- independence, which may suggest a transition to a perturbative scattering mechanism at the quark level.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-01-01 |