Production of pions, kaons and protons in pp collisions at $\sqrt{s}= 900~\mathrm{GeV}$ with ALICE at the LHC
K. AamodtDepartment of Physics, University of Oslo, Oslo, NorwayN. AbelKirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Heidelberg, GermanyU. AbeysekaraPhysics Department, Creighton University, Omaha, NE, USAA. Abrahantes QuintanaCentro de Aplicaciones Tecnológicas y Desarrollo Nuclear (CEADEN), Havana, CubaA. AbramyanYerevan Physics Institute, Yerevan, ArmeniaD. AdamováNuclear Physics Institute, Academy of Sciences of the Czech Republic, Řež u Prahy, Czech RepublicM. M. AggarwalPhysics Department, Panjab University, Chandigarh, IndiaG. Aglieri RinellaEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandA. G. AgocsKFKI Research Institute for Particle and Nuclear Physics, Hungarian Academy of Sciences, Budapest, HungaryS. Aguilar SalazarInstituto de Física, Universidad Nacional Autónoma de México, Mexico City, MexicoZ. AhammedVariable Energy Cyclotron Centre, Kolkata, IndiaArshad AhmadDepartment of Physics, Aligarh Muslim University, Aligarh, IndiaN. AhmadDepartment of Physics, Aligarh Muslim University, Aligarh, IndiaS. U. AhnGangneung-Wonju National University, Gangneung, South KoreaR. AkimotoUniversity of Tokyo, Tokyo, JapanA. AkindinovInstitute for Theoretical and Experimental Physics, Moscow, RussiaD. AleksandrovRussian Research Centre Kurchatov Institute, Moscow, RussiaB. AlessandroSezione INFN, Turin, ItalyR. Alfaro MolinaInstituto de Física, Universidad Nacional Autónoma de México, Mexico City, MexicoA. AliciDipartimento di Fisica dell'Università and Sezione INFN, Bologna, ItalyE. Almaráz AviñaInstituto de Física, Universidad Nacional Autónoma de México, Mexico City, MexicoJ. AlmeDepartment of Physics and Technology, University of Bergen, Bergen, NorwayT. AltDipartimento Interateneo di Fisica 'M. Merlin' and Sezione INFN, Bari, ItalyV. AltiniDipartimento Interateneo di Fisica 'M. Merlin' and Sezione INFN, Bari, ItalyS. AltinpinarResearch Division and ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, GermanyC. AndreiA. AndronicResearch Division and ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, GermanyG. AnelliEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandV. AngelovKirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Heidelberg, GermanyC. AnsonDepartment of Physics, Ohio State University, Columbus, OH, USAT. AntičićRudjer Bošković Institute, Zagreb, CroatiaF. AntinoriEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandS. AntinoriDipartimento di Fisica dell'Università and Sezione INFN, Bologna, ItalyK. AntipinInstitut für Kernphysik, Johann Wolfgang Goethe-Universität Frankfurt, Frankfurt, GermanyD. AntończykInstitut für Kernphysik, Johann Wolfgang Goethe-Universität Frankfurt, Frankfurt, GermanyP. AntonioliSezione INFN, Bologna, ItalyA. AnzoInstituto de Física, Universidad Nacional Autónoma de México, Mexico City, MexicoL. AphecetcheSUBATECH, Ecole des Mines de Nantes, Université de Nantes, CNRS-IN2P3, Nantes, FranceH. AppelshäuserInstitut für Kernphysik, Johann Wolfgang Goethe-Universität Frankfurt, Frankfurt, GermanyS. ArcelliDipartimento di Fisica dell'Università and Sezione INFN, Bologna, ItalyR. ArceoInstituto de Física, Universidad Nacional Autónoma de México, Mexico City, MexicoA. ArendInstitut für Kernphysik, Johann Wolfgang Goethe-Universität Frankfurt, Frankfurt, GermanyN. ArmestoDepartamento de Física de Partículas and IGFAE, Universidad de Santiago de Compostela, Santiago de Compostela, SpainR. ArnaldiSezione INFN, Turin, ItalyT. AronssonYale University, New Haven, CT, USAI. C. ArseneDepartment of Physics, University of Oslo, Oslo, NorwayA. AsryanA. AugustinusEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandR. AverbeckResearch Division and ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, GermanyT. C. AwesOak Ridge National Laboratory, Oak Ridge, TN, USAJ. ÄystöHelsinki Institute of Physics (HIP) and University of Jyväskylä, Jyväskylä, FinlandM. D. AzmiDepartment of Physics, Aligarh Muslim University, Aligarh, IndiaS. BablokDepartment of Physics and Technology, University of Bergen, Bergen, NorwayM. BachFrankfurt Institute for Advanced Studies, Johann Wolfgang Goethe-Universität Frankfurt, Frankfurt, GermanyA. BadalàSezione INFN, Catania, ItalyY. W. BaekGangneung-Wonju National University, Gangneung, South KoreaS. BagnascoSezione INFN, Turin, ItalyR. BailhacheResearch Division and ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, GermanyR. BalaDipartimento di Fisica Sperimentale dell'Università and Sezione INFN, Turin, ItalyA. BaldisseriCommissariat à l'Energie Atomique, IRFU, Saclay, FranceA. BalditLaboratoire de Physique Corpusculaire (LPC), Clermont Université, Université Blaise Pascal, CNRS-IN2P3, Clermont-Ferrand, FranceJ. BánFaculty of Science, P.J. Šafárik University, Košice, SlovakiaR. BarberaDipartimento di Fisica e Astronomia dell'Università and Sezione INFN, Catania, ItalyG. G. BarnaföldiKFKI Research Institute for Particle and Nuclear Physics, Hungarian Academy of Sciences, Budapest, HungaryL. S. BarnbySchool of Physics and Astronomy, University of Birmingham, Birmingham, UKV. BarretLaboratoire de Physique Corpusculaire (LPC), Clermont Université, Université Blaise Pascal, CNRS-IN2P3, Clermont-Ferrand, FranceJ. BartkeThe Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Cracow, PolandF. BarileDipartimento Interateneo di Fisica 'M. Merlin' and Sezione INFN, Bari, ItalyM. BasileDipartimento di Fisica dell'Università and Sezione INFN, Bologna, ItalyV. BasmanovRussian Federal Nuclear Center (VNIIEF), Sarov, RussiaN. BastidLaboratoire de Physique Corpusculaire (LPC), Clermont Université, Université Blaise Pascal, CNRS-IN2P3, Clermont-Ferrand, FranceB. BathenInstitut für Kernphysik, Westfälische Wilhelms-Universität Münster, Münster, GermanyG. BatigneSUBATECH, Ecole des Mines de Nantes, Université de Nantes, CNRS-IN2P3, Nantes, FranceB. BatyunyaJoint Institute for Nuclear Research (JINR), Dubna, RussiaC. BaumannInstitut für Kernphysik, Westfälische Wilhelms-Universität Münster, Münster, GermanyI. G. BeardenNiels Bohr Institute, University of Copenhagen, Copenhagen, DenmarkBruce BeckerSezione INFN, Cagliari, ItalyI. BelikovInstitut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg, CNRS-IN2P3, Strasbourg, FranceR. BellwiedWayne State University, Detroit, MI, USAE. MorenoInstituto de Física, Universidad Nacional Autónoma de México, Mexico City, MexicoA. BelogianniPhysics Department, University of Athens, Athens, GreeceL. BenhabibSUBATECH, Ecole des Mines de Nantes, Université de Nantes, CNRS-IN2P3, Nantes, FranceS. BeolèDipartimento di Fisica Sperimentale dell'Università and Sezione INFN, Turin, ItalyI. BerceanuA. BercuciResearch Division and ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, GermanyE. BerdermannResearch Division and ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, GermanyY. BerdnikovPetersburg Nuclear Physics Institute, Gatchina, RussiaL. BetevEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandA. BhasinPhysics Department, University of Jammu, Jammu, IndiaA. K. BhatiPhysics Department, Panjab University, Chandigarh, IndiaL. BianchiDipartimento di Fisica Sperimentale dell'Università and Sezione INFN, Turin, ItalyN. BianchiLaboratori Nazionali di Frascati, INFN, Frascati, ItalyC. BianchinDipartimento di Fisica dell'Università and Sezione INFN, Padova, ItalyJ. BielčíkFaculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Prague, Czech RepublicJ. BielčíkováNuclear Physics Institute, Academy of Sciences of the Czech Republic, Řež u Prahy, Czech RepublicA. BilandzicNikhef, National Institute for Subatomic Physics, Amsterdam, NetherlandsL. BimbotInstitut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud, CNRS-IN2P3, Orsay, FranceE. BiolcatiDipartimento di Fisica Sperimentale dell'Università and Sezione INFN, Turin, ItalyAurélien BlancDipartimento di Fisica e Astronomia dell'Università and Sezione INFN, Catania, ItalyF. BlancoDipartimento di Fisica e Astronomia dell'Università and Sezione INFN, Catania, Italy
2011en
ABI
Аннотация
The production of π \n+, π \n−, K+, K−, p, and p at \nmid-rapidity has been measured in proton-proton collisions \nat \n√ \ns = 900 GeV with the ALICE detector. Particle identification \nis performed using the specific energy loss in the \ninner tracking silicon detector and the time projection chamber. \nIn addition, time-of-flight information is used to identify \nhadrons at higher momenta. Finally, the distinctive kink \ntopology of the weak decay of charged kaons is used for \nan alternative measurement of the kaon transverse momentum \n(pt) spectra. Since these various particle identification \ntools give the best separation capabilities over different momentum \nranges, the results are combined to extract spectra \nfrom pt = 100 MeV/c to 2.5 GeV/c. The measured spectra \nare further compared with QCD-inspired models which \nyield a poor description. The total yields and the mean pt are \ncompared with previous measurements, and the trends as a \nfunction of collision energy are discussed.
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