Artigo
Charged particle transverse momentum spectra in pp collisions at √s = 0:9 and 7 TeV
Fecha
2011-11-24Registro en:
Journal of High Energy Physics, v. 2011, n. 8, 2011.
1126-6708
1029-8479
10.1007/JHEP08(2011)086
2-s2.0-81555210082
2-s2.0-81555210082.pdf
Autor
Yerevan Physics Institute
Institut für Hochenergiephysik der OeAW
National Centre for Particle and High Energy Physics
Universiteit Antwerpen
Vrije Universiteit Brussel
Université Libre de Bruxelles
Ghent University
Université Catholique de Louvain
Université de Mons
Centro Brasileiro de Pesquisas Físicas (CBPF)
Universidade do Estado do Rio de Janeiro (UERJ)
Universidade Estadual Paulista (Unesp)
Institute for Nuclear Research and Nuclear Energy
University of Soa
Institute of High Energy Physics
Peking University
Universidad de los Andes
Technical University of Split
University of Split
Institute Rudjer Boskovic
University of Cyprus
Charles University
Egyptian Network of High Energy Physics
National Institute of Chemical Physics and Biophysics
University of Helsinki
Helsinki Institute of Physics
Lappeenranta University of Technology
IN2P3-CNRS
CEA/Saclay
CNRS/IN2P3
Centre de Calcul de l'Institut National de Physique Nucleaire et de Physique des Particules (IN2P3)
Institut de Physique Nucléaire de Lyon
Tbilisi State University
I. Physikalisches Institut
III. Physikalisches Institut A
III. Physikalisches Institut B
Deutsches Elektronen-Synchrotron
University of Hamburg
Institut für Experimentelle Kernphysik
Institute of Nuclear Physics Demokritos
University of Athens
University of Ióannina
KFKI Research Institute for Particle and Nuclear Physics
Institute of Nuclear Research ATOMKI
University of Debrecen
Panjab University
University of Delhi
Bhabha Atomic Research Centre
Tata Institute of Fundamental Research - EHEP
Tata Institute of Fundamental Research - HECR
Institute for Research and Fundamental Sciences (IPM)
INFN Sezione di Bari
Università di Bari
Politecnico di Bari
INFN Sezione di Bologna
Università di Bologna
INFN Sezione di Catania
Università di Catania
INFN Sezione di Firenze
Università di Firenze
INFN Laboratori Nazionali di Frascati
INFN Sezione di Genova
INFN Sezione di Milano-Biccoca
Università di Milano-Bicocca
INFN Sezione di Napoli
Università di Napoli Federico II
INFN Sezione di Padova
Università di Padova
Università di Trento (Trento)
INFN Sezione di Pavia
Università di Pavia
INFN Sezione di Perugia
Università di Perugia
INFN Sezione di Pisa
Università di Pisa
Scuola Normale Superiore di Pisa
INFN Sezione di Roma
Università di Roma La Sapienza
INFN Sezione di Torino
Università di Torino
Università del Piemonte Orientale (Novara)
INFN Sezione di Trieste
Università di Trieste
Kangwon National University
Kyungpook National University
Institute for Universe and Elementary Particles
Korea University
University of Seoul
Sungkyunkwan University
Vilnius University
Centro de Investigacion y de Estudios Avanzados del IPN
Universidad Iberoamericana
Benemerita Universidad Autonoma de Puebla
Universidad Autónoma de San Luis Potos
University of Auckland
University of Canterbury
Quaid-I-Azam University
University of Warsaw
Soltan Institute for Nuclear Studies
Laboratório de Instrumentação e Física Experimental de Partículas (LIP)
Joint Institute for Nuclear Research
Petersburg Nuclear Physics Institute
Institute for Nuclear Research
Institute for Theoretical and Experimental Physics (ITEP)
Moscow State University
P.N. Lebedev Physical Institute
Institute for High Energy Physics
Institute of Nuclear Sciences
Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT)
Universidad Autónoma de Madrid
Universidad de Oviedo
CSIC-Universidad de Cantabria
European Organization for Nuclear Research
Paul Scherrer Institut
ETH Zurich
Universität Zürich
National Central University
National Taiwan University (NTU)
Cukurova University
Physics Department
Bogazici University
Kharkov Institute of Physics and Technology
University of Bristol
Rutherford Appleton Laboratory
Imperial College
Brunel University
Baylor University
Boston University
Brown University
University of California
University of California, San Diego
California Institute of Technology
Carnegie Mellon University
University of Colorado at Boulder
Cornell University
Fairfield University
Fermi National Accelerator Laboratory
University of Florida
Florida International University
Florida State University
Florida Institute of Technology
University of Illinois at Chicago (UIC)
University of Iowa
Johns Hopkins University
University of Kansas (KU)
Kansas State University
Lawrence Livermore National Laboratory
University of Maryland
Massachusetts Institute of Technology (MIT)
University of Minnesota
University of Mississippi
University of Nebraska-Lincoln
State University of New York
Northeastern University
Northwestern University (NU)
University of Notre Dame
Ohio State University
Princeton University
University of Puerto Rico
Purdue University
Purdue University Calumet
Rice University
University of Rochester
Rockefeller University
Rutgers, State University of New Jersey
University of Tennessee
Texas A and M University
Texas Tech University
Vanderbilt University
University of Virginia (UVA)
Wayne State University
University of Wisconsin
CERN, European Organization for Nuclear Research
Universidade Federal do ABC (UFABC)
Ecole Polytechnique, IN2P3-CNRS
Suez Canal University
British University
Fayoum University
Université de Haute-Alsace
Brandenburg University of Technology
Eötvös Loránd University
University of Visva-Bharati
Sharif University of Technology
Shiraz University
Isfahan University of Technology
Facoltà Ingegneria Università di Roma La Sapienza
Università della Basilicata
Laboratori Nazionali di Legnaro dell' INFN
Università degli studi di Siena
University of Belgrade
Université de Genève
Scuola Normale e Sezione dell' INFN
Faculty of Physics and Vinca Institute of Nuclear Sciences
Gaziosmanpasa University
Adiyaman University
Mersin University
Izmir Institute of Technology
Kafkas University
Suleyman Demirel University
Ege University
University of Southampton
Utah Valley University
Los Alamos National Laboratory
Erzincan University
Resumen
The charged particle transverse momentum (pT) spectra are presented for pp collisions at √s = 0:9 and 7TeV. The data samples were collected with the CMS detector at the LHC and correspond to integrated luminosities of 231 μb-1 and 2.96 pb-1, respectively. Calorimeter-based high-transverse-energy triggers are employed to enhance the statistical reach of the high-pT measurements. The results are compared with leading and next-toleading order QCD and with an empirical scaling of measurements at different collision energies using the scaling variable xT - 2pT=ps over the pT range up to 136 GeV/c. Using a combination of xT scaling and direct interpolation at fixed pT, a reference transverse momentum spectrum at √s = 2:76TeV is constructed, which can be used for studying high-pT particle suppression in the dense QCD medium produced in heavy-ion collisions at that centre-of-mass energy. Copyright CERN.