Measurement of deeply virtual Compton scattering and its t-dependence at HERA
F. D. AaronNational Institute for Physics and Nuclear Engineering (NIPNE), Bucharest, RomaniaA. AktasC. AlexaNational Institute for Physics and Nuclear Engineering (NIPNE), Bucharest, RomaniaV. AndreevLebedev Physical Institute , Moscow , RussiaB. AntunovićS. AplinA. AsmoneA. AstvatsatourovInter-University Institute for High Energies ULB-VUB , Brussels ;S. BackovićUniversité Paris 8A. BaghdasaryanYerevan Physics Institute, Yerevan, ArmeniaP. BaranovLebedev Physical Institute , Moscow , RussiaE. BarreletSorbonne UniversitéW. BartelS. BaudrandInstitut National de Physique Nucléaire et de Physique des ParticulesM. BeckinghamK. BegzsurenInstitute of Physics and TechnologyO. BehnkePhysikalisches Institut , Universität Heidelberg , Heidelberg , GermanyO. BehrendtInstitut für Physik , Universität Dortmund , Dortmund , GermanyA. BelousovLebedev Physical Institute , Moscow , RussiaN. BergerParticle PhysicsJ.C. BizotLAL, Univ Paris-Sud, CNRS/IN2P3, Orsay, FranceM.-O. BoenigInstitut für Physik , Universität Dortmund , Dortmund , GermanyV. BoudryLaboratoire d'Informatique de l'École PolytechniqueI. Božović-Jelisavc̆ićDESY, Hamburg, GermanyJ. BraciníkUniversité Paris 8G. BrandtParticle PhysicsMartin BrinkmannDESY , Hamburg , GermanyV. BrissonLAL, Univ Paris-Sud, CNRS/IN2P3, Orsay, FranceD. BrunckoInstitute of Experimental Physics , Slovak Academy of Sciences , Košice , Slovak RepublicF.W. BüsserInstitut für Experimentalphysik , Universität Hamburg , Hamburg , GermanyA. BunyatyanInstitut für Teilchenphysik , ETH , Zürich , SwitzerlandG. BuschhornMax-Planck-Institut für Physik , München , GermanyL. BystritskayaInstitute for Theoretical and Experimental Physics , Moscow , RussiaA.J. CampbellDESY , Hamburg , GermanyK. B. Cantun AvilaInstitute of Physics and Technology of the Mongolian Academy of Sciences, Ulaanbaatar, MongoliaF. Cassol-BrunnerNational Institute for Physics and Nuclear Engineering (NIPNE), Bucharest, RomaniaK. CernyParticle PhysicsV. CernyInstitute of Experimental Physics , Slovak Academy of Sciences , Košice , Slovak RepublicV. ChekelianMax-Planck-Institut für Physik , München , GermanyA. CholewaJ.G. ContrerasDepartamento de Fisica Aplicada , CINVESTAV , Mérida , Yucatán , MexicoJ. A. CoughlanInstitut für Teilchenphysik , ETH , Zürich , SwitzerlandG. CozzikaCEA Paris-SaclayJ. CvachUniversité Paris 8J.B. DaintonDepartment of Physics , University of Liverpool , Liverpool , UKK. DaumFachbereich C , Universität Wuppertal , Wuppertal , GermanyMichal DeákY. de BoerYerevan Physics Institute, Yerevan, ArmeniaB. DelcourtInstitut National de Physique Nucléaire et de Physique des ParticulesM. Del DeganJ. DelvaxInter-University Institute for High Energies ULB-VUB , Brussels ;A. De RoeckDESY , Hamburg , GermanyE. A. De WolfInter-University Institute for High Energies ULB-VUB , Brussels ;C. DiaconuLPNHE , Universités Paris VI and VII , IN2P3-CNRS , Paris , FranceV. DodonovMax-Planck-Institut für Kernphysik , Heidelberg , GermanyA. DossanovMax-Planck-Institut für Physik , München , GermanyA. DubakFaculty of Science , University of Montenegro , Podgorica , MontenegroG. EckerlinDESY , Hamburg , GermanyV. EfremenkoInstitute for Theoretical and Experimental Physics , Moscow , RussiaS. EgliParticle PhysicsR. EichlerParticle PhysicsF. EiselePhysikalisches Institut , Universität Heidelberg , Heidelberg , GermanyA. EliseevLebedev Physical Institute , Moscow , RussiaE. ElsenDESY , Hamburg , GermanyS. EssenovParticle PhysicsA. FalkiewiczInstitute for Nuclear Physics , Cracow , PolandPeter FaulknerJoint Institute for Nuclear Research, Dubna, RussiaL. FavartParticle PhysicsA. FedotovInstitute for Theoretical and Experimental Physics , Moscow , RussiaR. FelstDESY , Hamburg , GermanyJ. FeltesseCEA , DSM/DAPNIA , CE-Saclay , Gif-sur-Yvette , FranceJ. FerenceiParticle PhysicsL. FinkeDESY , Hamburg , GermanyM. FleischerA. FomenkoLebedev Physical Institute , Moscow , RussiaG. FrankeDESY , Hamburg , GermanyT. FrissonDESY, Hamburg, GermanyE. GabathulerDepartment of Physics , University of Liverpool , Liverpool , UKJ. GaylerDESY , Hamburg , GermanyS. GhazaryanParticle PhysicsA. GlazovDESY , Hamburg , GermanyI. Glushkovs Queen Mary and Westfield College , London , UKL. GoerlichParticle PhysicsM. GoettlichInstitut für Experimentalphysik , Universität Hamburg , Hamburg , GermanyN. GogitidzeLebedev Physical Institute , Moscow , RussiaS. Gorbounovs Queen Mary and Westfield College , London , UKM. GouzevitchDESY, Hamburg, GermanyC. GrabInstitut für Teilchenphysik , ETH , Zürich , SwitzerlandT. GreenshawDepartment of Physics , University of Liverpool , Liverpool , UKB.R. GrellJoint Institute for Nuclear Research, Dubna, RussiaG. GrindhammerParticle PhysicsS. HabibParticle PhysicsD. HaidtI. Physikalisches Institut der RWTH, Aachen, GermanyM. HanssonInstitut für Teilchenphysik , ETH , Zürich , SwitzerlandG. HeinzelmannParticle PhysicsC. HelebrantDESY , Hamburg , GermanyR.C.W. HendersonDepartment of Physics , University of Lancaster , Lancaster , UKH. HenschelParticle PhysicsG. Herrerat Physics Department , University of Lund , Lund , SwedenM. Hildebrandt
2008en
ABI
Annotatsiya
A measurement of elastic deeply virtual Compton scattering γ∗p→γp using e−p collision data recorded with the H1 detector at HERA is presented. The analysed data sample corresponds to an integrated luminosity of 145 pb−1. The cross section is measured as a function of the virtuality Q2 of the exchanged photon and the centre-of-mass energy W of the γ∗p system in the kinematic domain 6.5<Q2<80 GeV2, 30<W<140 GeV and |t|<1 GeV2, where t denotes the squared momentum transfer at the proton vertex. The cross section is determined differentially in t for different Q2 and W values and exponential t-slope parameters are derived. The measurements are compared to a NLO QCD calculation based on generalised parton distributions. In the context of the dipole approach, the geometric scaling property of the DVCS cross section is studied for different values of t.
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