Elastic and proton-dissociative photoproduction of J/ψ mesons at HERA
C. AlexaNational Institute for Physics and Nuclear Engineering (NIPNE), Bucharest, RomaniaV. AndreevLebedev Physical Institute, Moscow, RussiaA. BaghdasaryanYerevan Physics Institute, Yerevan, ArmeniaS. BaghdasaryanYerevan Physics Institute, Yerevan, ArmeniaW. BartelDESY, Hamburg, GermanyK. BegzsurenInstitute of Physics and Technology of the Mongolian Academy of Sciences, Ulaanbaatar, MongoliaA.S. BelousovLebedev Physical Institute, Moscow, RussiaP. BelovV. BoudryÉcole PolytechniqueI. Božović-Jelisavc̆ićVinca Institute of Nuclear Sciences, University of Belgrade, 1100 Belgrade, SerbiaG. BrandtDepartment of Physics, Oxford University, Oxford, UKMartin BrinkmannV. BrissonLAL, Universit Paris-Sud, CNRS/IN2P3, Orsay, FranceD. BritzgerA. BuniatyanPhysikalisches Institut, Universitt Heidelberg, Heidelberg, GermanyA. BylinkinAlso at Moscow Institute of Physics and Technology, Moscow, Rus-siaL. BystritskayaInstitute for Theoretical and Experimental Physics, Moscow, RussiaA. J. CampbellK. B. Cantun AvilaDepartamento de Fisica Aplicada, CINVESTAV, Mrida, Yucatn, MxicoF. CeccopieriInter-University Institute for High Energies ULB-VUB, Brussels, BelgiumK. ČernýFaculty of Mathematics and Physics, Charles University, Praha, Czech RepublicV. ChekelianMax-Planck-Institut fr Physik, Mnchen, GermanyJ.G. ContrerasDepartamento de Fisica Aplicada, CINVESTAV, Mrida, Yucatn, MxicoH. DenizliInstitute of Physics, Academy of Sciences of the Czech Republic, Praha, Czech RepublicJ.B. DaintonDepartment of Physics, University of Liverpool, Liverpool, UKK. DaumAlso at Rechenzentrum, Universitt Wuppertal, Wuppertal, GermanyE. A. De WolfInter-University Institute for High Energies ULB-VUB, Brussels, BelgiumC. DiaconuCPPM, Aix-Marseille Univ, CNRS/IN2P3, 13288 Marseille, FranceM. DobreNational Institute for Physics and Nuclear Engineering (NIPNE), Bucharest, RomaniaV. DodonovMax-Planck-Institut fr Kernphysik, Heidelberg, GermanyA. DossanovInstitut fr Experimentalphysik, Universitt Hamburg, Hamburg, GermanyG. EckerlinS. EgliPaul Scherrer Institut, Villigen, SwitzerlandE. ElsenL. FavartInter-University Institute for High Energies ULB-VUB, Brussels, BelgiumA. FedotovInstitute for Theoretical and Experimental Physics, Moscow, RussiaR. FelstJ. FeltesseCEA, DSM/Irfu, CE-Saclay, Gif-sur-Yvette, FranceJ. FerenceiInstitute of Experimental Physics, Slovak Academy of Sciences, Koice, Slovak Republic nD.-J. FischerM. FleischerA. FomenkoLebedev Physical Institute, Moscow, RussiaE. GabathulerDepartment of Physics, University of Liverpool, Liverpool, UKJ. GaylerS. GhazaryanA. GlazovL. GoerlichN. GogitidzeLebedev Physical Institute, Moscow, RussiaM. GouzevitchAlso at IPNL, Universit Claude Bernard Lyon 1, CNRS/IN2P3, Villeurbanne, FranceC. GrabInstitut fr Teilchenphysik, ETH, Zrich, SwitzerlandA. GrebenyukT. GreenshawDepartment of Physics, University of Liverpool, Liverpool, UKG. GrindhammerMax-Planck-Institut fr Physik, Mnchen, GermanyS. HabibD. HaidtR. C. W. HendersonDepartment of Physics, University of Lancaster, Lancaster, UKE. HennekemperKirchhoff-Institut fr Physik, Universitt Heidelberg, Heidelberg, GermanyMatthew HerbstKirchhoff-Institut fr Physik, Universitt Heidelberg, Heidelberg, GermanyG. HerreraDepartamento de Fisica, CINVESTAV IPN, Mxico City, MxicoM. HildebrandtPaul Scherrer Institut, Villigen, SwitzerlandK. H. HillerDESY, Zeuthen, GermanyJ. HladkýInstitute of Physics, Academy of Sciences of the Czech Republic, Praha, Czech RepublicD. HoffmannCPPM, Aix-Marseille Univ, CNRS/IN2P3, 13288 Marseille, FranceR. HorisbergerPaul Scherrer Institut, Villigen, SwitzerlandT. HreusInter-University Institute for High Energies ULB-VUB, Brussels, BelgiumF. HuberPhysikalisches Institut, Universitt Heidelberg, Heidelberg, GermanyM. JacquetLAL, Universit Paris-Sud, CNRS/IN2P3, Orsay, FranceX. JanssenInter-University Institute for High Energies ULB-VUB, Brussels, BelgiumL. JönssonPhysics Department, University of Lund, Lund, SwedenH. JungM. KapichineJoint Institute for Nuclear Research, Dubna, RussiaC. KieslingMax-Planck-Institut fr Physik, Mnchen, GermanyM. KleinDepartment of Physics, University of Liverpool, Liverpool, UKC. KleinwortR. KoglerInstitut fr Experimentalphysik, Universitt Hamburg, Hamburg, GermanyP. KostkaDESY, Zeuthen, GermanyMichael KrämerJ. KretzschmarDepartment of Physics, University of Liverpool, Liverpool, UKK. KrügerM. P. J. LandonSchool of Physics and Astronomy, Queen Mary, University of London, London, UKW. LangeDESY, Zeuthen, GermanyP. LaycockDepartment of Physics, University of Liverpool, Liverpool, UKA. LebedevLebedev Physical Institute, Moscow, RussiaS. LevonianK. LipkaB. ListJ. ListB. LobodzinskiR. López-FernándezDepartamento de Fisica, CINVESTAV IPN, Mxico City, MxicoV. LubimovInstitute for Theoretical and Experimental Physics, Moscow, RussiaE. MalinovskiLebedev Physical Institute, Moscow, RussiaH.-U. MartynI. Physikalisches Institut der RWTH, Aachen, GermanyS. J. MaxfieldDepartment of Physics, University of Liverpool, Liverpool, UKA. MehtaDepartment of Physics, University of Liverpool, Liverpool, UKA. MeyerH. MeyerFachbereich C, Universitt Wuppertal, Wuppertal, GermanyJ. MeyerS. MikockiI. Milcewicz-MikaA. A. MorozovJoint Institute for Nuclear Research, Dubna, Russia
2013en
ABI
Аннотация
Cross sections for elastic and proton-dissociative photoproduction of J / mesons are measured with the H1 detector in positron-proton collisions at HERA. The data were collected at ep centre-of-mass energies s 318 GeV and s 225 GeV, corresponding to integrated luminosities of L = 130 pb -1 and L = 10.8 pb -1 , respectively. The cross sections are measured as a function of the photon-proton centre-of-mass energy in the range 25 < W p < 110 GeV. Differential cross sections d/dt, where t is the squared four-momentum transfer at the proton vertex, are measured in the range |t| < 1.2 GeV 2 for the elastic process and |t| < 8 GeV 2 for proton dissociation. The results are compared to other measurements.
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