Observation of the hadronic final state charge asymmetry in high<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msup><mml:mi>Q</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:math>deep-inelastic scattering at HERA
F. D. AaronNational Institute for Physics and Nuclear Engineering (NIPNE), Bucharest, RomaniaM. Aldaya MartinC. AlexaNational Institute for Physics and Nuclear Engineering (NIPNE), Bucharest, RomaniaK. AlimujiangV. AndreevLebedev Physical Institute, Moscow, Russia 20B. AntunovićA. AsmoneS. BackovićFaculty of Science, University of Montenegro, Podgorica, Montenegro 20A. BaghdasaryanYerevan Physics Institute, Yerevan, ArmeniaE. BarreletLaboratoire de Physique Nucléaire et de Hautes ÉnergiesW. BartelK. BegzsurenInstitute of Physics and Technology of the Mongolian Academy of Sciences, Ulaanbaatar, MongoliaA. BelousovLebedev Physical Institute, Moscow, Russia 20J.C. BizotInstitut National de Physique Nucléaire et de Physique des ParticulesV. BoudryÉcole PolytechniqueI. Božović-Jelisavc̆ićVinča Institute of Nuclear SciencesJ. BraciníkSchool of Physics and Astronomy, University of Birmingham, Birmingham, UKG. BrandtMartin BrinkmannInstitut für Experimentalphysik, Universität Hamburg, Hamburg, Germany 12V. BrissonLAL, Univ. Paris-Sud, CNRS/IN2P3, Orsay, FranceD. BrunckoDESY, Hamburg, GermanyA. BunyatyanYerevan Physics Institute, Yerevan, ArmeniaG. BuschhornMax-Planck-Institut für Physik, München, GermanyL. BystritskayaVinca Institute of Nuclear Sciences, Belgrade, SerbiaAlan CampbellK. B. Cantun AvilaDepartamento de Fisica Aplicada, CINVESTAV, Mérida, Yucatán, Mexico 18F. Cassol-BrunnerNational Institute for Physics and Nuclear Engineering (NIPNE), Bucharest, RomaniaK. ČernýFaculty of Mathematics and Physics, Charles University, Praha, Czech Republic 21V. ČernýInstitut National de Physique Nucléaire et de Physique des ParticulesV. ChekelianInstitut National de Physique Nucléaire et de Physique des ParticulesA. CholewaJ.G. ContrerasDepartamento de Fisica Aplicada, CINVESTAV, Mérida, Yucatán, Mexico 18J. A. CoughlanRutherford Appleton Laboratory, Chilton, Didcot, UK 13G. CozzikaInstitut de Recherche sur les Lois Fondamentales de l'UniversJ. CvachInstitute of Physics, Academy of Sciences of the Czech Republic, Praha, Czech Republic 21J.B. DaintonDepartment of Physics, University of Liverpool, Liverpool, UK 13K. DaumFachbereich C, Universität Wuppertal, Wuppertal, GermanyMichal DeákY. de BoerDESY, Hamburg, GermanyB. DelcourtCentre National de la Recherche ScientifiqueM. Del DeganInstitut für Teilchenphysik, ETH, Zürich, Switzerland 22J. DelvaxInter-University Institute for High Energies ULB-VUB, Brussels and Universiteit Antwerpen, Antwerpen, Belgium 14E. A. De WolfInter-University Institute for High Energies ULB-VUB, Brussels and Universiteit Antwerpen, Antwerpen, Belgium 14C. DiaconuCentre de physique des particules de MarseilleV. DodonovMax-Planck-Institut für Kernphysik, Heidelberg, GermanyA. DossanovMax-Planck-Institut für Physik, München, GermanyA. DubakAlso at Max-Planck-Institut für Physik, München, GermanyG. EckerlinV. EfremenkoInstitute for Theoretical and Experimental PhysicsS. EgliPaul Scherrer InstituteA. EliseevLebedev Physical Institute, Moscow, Russia 20E. ElsenVinca Institute of Nuclear Sciences, Belgrade, SerbiaA. FalkiewiczInstitute for Nuclear Physics, Cracow, Poland 15L. FavartVinca Institute of Nuclear Sciences, Belgrade, SerbiaA. FedotovInstitute for Theoretical and Experimental Physics, Moscow, Russia 19R. FelstLAL, Univ. Paris-Sud, CNRS/IN2P3, Orsay, FranceJ. FeltesseCEA Paris-SaclayJ. FerenceiInstitute of Experimental Physics of the Slovak Academy of SciencesD.-J. FischerM. FleischerA. FomenkoLebedev Physical Institute, Moscow, Russia 20E. GabathulerDepartment of Physics, University of Liverpool, Liverpool, UK 13J. GaylerS. GhazaryanLAL, Univ. Paris-Sud, CNRS/IN2P3, Orsay, FranceA. GlazovI. GlushkovLAL, Univ. Paris-Sud, CNRS/IN2P3, Orsay, FranceL. GoerlichVinča Institute of Nuclear SciencesN. GogitidzeLebedev Physical Institute, Moscow, Russia 20M. GouzevitchC. GrabInstitut für Teilchenphysik, ETH, Zürich, Switzerland 22T. GreenshawDepartment of Physics, University of Liverpool, Liverpool, UK 13B.R. GrellInstitut National de Physique Nucléaire et de Physique des ParticulesG. GrindhammerMax-Planck-Institut für Physik, München, GermanyS. HabibInstitut National de Physique Nucléaire et de Physique des ParticulesD. HaidtC. HelebrantR. C. W. HendersonDepartment of Physics, University of Lancaster, Lancaster, UK 13E. HennekemperVinca Institute of Nuclear Sciences, Belgrade, SerbiaH. HenschelDESY, Zeuthen, GermanyM. HerbstKirchhoff-Institut für Physik, Universität Heidelberg, Heidelberg, Germany 12G. HerreraDepartamento de Fisica, CINVESTAV, Mexico 18M. HildebrandtPaul Scherrer Institut, Villigen, SwitzerlandK. H. HillerDESY, Zeuthen, GermanyD. HoffmannCPPM, CNRS/IN2P3 - Univ. Mediterranee, Marseille, FranceR. HorisbergerLAL, Univ. Paris-Sud, CNRS/IN2P3, Orsay, FranceT. HreusInter-University Institute for High Energies ULB-VUB, Brussels and Universiteit Antwerpen, Antwerpen, Belgium 14M. JacquetInstitut National de Physique Nucléaire et de Physique des ParticulesM.E. JanssenX. JanssenInter-University Institute for High Energies ULB-VUB, Brussels and Universiteit Antwerpen, Antwerpen, Belgium 14L. JönssonVinca Institute of Nuclear Sciences, Belgrade, SerbiaA. JungKirchhoff-Institut für Physik, Universität Heidelberg, Heidelberg, Germany 12H. JungDESY, Hamburg, GermanyM. KapichineJoint Institute for Nuclear Research, Dubna, RussiaJ. KatzyI. R. KenyonUniversity of BirminghamC. KieslingMax-Planck-Institut für Physik, München, GermanyM. KleinDepartment of Physics, University of Liverpool, Liverpool, UK 13C. KleinwortT. KlugeDepartment of Physics, University of Liverpool, Liverpool, UK 13A. Knutsson
2009en
ABI
Аннотация
A first measurement is presented of the charge asymmetry in the hadronic final state from the hard interaction in deep-inelastic ep neutral current scattering at HERA. The measurement is performed in the range of negative squared four momentum transfer 100 < Q 2 < 8000 GeV 2 . The difference between the event normalised distributions of the scaled momentum, x p , for positively and negatively charged particles, measured in the current region of the Breit frame, is studied together with its evolution as a function of Q . The results are compared to Monte Carlo models at the hadron and parton levels.
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