Transverse-momentum and pseudorapidity distributions of charged hadrons in pp collisions at √s = 0.9 and 2.36TeV

CMS Collaboration

doi:10.1007/JHEP02(2010)041

Transverse-momentum and pseudorapidity distributions of charged hadrons in pp collisions at √s = 0.9 and 2.36TeV

CMS Collaboration

Yerevan Physics Institute
Institut für Hochenergiephysik
European Organization for Nuclear Research
National Centre for Particle and High Energy Physics
University of Antwerp
Vrjie Universiteit Brussel
Université Libre de Bruxelles
Ghent University
University of Louvain
Université de Mons
Centro Brasileiro de Pesquisas Fisicas
Rua São Francisco de Xavier
São Paulo State University
Federal University of ABC (UFABC)
Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences
University of Soa
Institute of High Energy Physics, Chinese Academy of Sciences
Tsinghua University
Universidad de Los Andes, Colombia
University of Split
Ruđer Bošković Institute
University of Cyprus
National Institute of Chemical Physics and Biophysics, Tallinn
University of Helsinki
Helsinki Institute of Physics
LUT University
Université Paris-Sud
CEA/UVSQ/CNRS
Ip Paris
Université de Strasbourg
IGFL, Université de Lyon, Université Lyon 1
Academy of Science
RWTH Aachen University
c/o DESY
Universität Hamburg
Universität Karlsruhe/Forschungszentrum Karlsruhe
Moscow State University
Institute of Nuclear Physics Demokritos
University of Athens
University of Ioannina
Wigner Research Centre for Physics
Institute of Nuclear Research ATOMKI
University of Debrecen
Panjab University
University of Delhi
University of California, San Diego
Bhabha Atomic Research Centre
Tata Institute of Fundamental Research, Mumbai
University of Visva-Bharati
Institute for Studies in Theoretical Physics and Mathematics (IPM)
University College Dublin
Università degli studi di Bari Aldo Moro
University of Bologna
Università degli Studi di Catania
University of Florence
LNF-INFN
University of Rome
Sezione di Genova
University of Milano-Bicocca
University of Naples Federico II
Università degli Studi della Basilicata
University of Padova
Laboratori Nazionali di Legnaro
University of Pavia
University of Perugia
University of Pisa
University of Turin
University of Trieste
Kyungpook National University
Chonnam National University
Konkuk University
Korea University
Seoul National University
University of Seoul
Sungkyunkwan University
Vilnius University
CINVESTAV-IPN
Universidad Iberoamericana
Benemerita Universidad Autonoma de Puebla
Universidad Autónoma de San Luis Potosi
University of Auckland
University of Canterbury
Quaid-i-Azam University
University of Warsaw
Soltan Institute for Nuclear Studies
Lisboa
Joint Institute for Nuclear Research, Dubna
Petersburg Nuclear Physics Institute (PNPI)
Institute for Nuclear Research of the Russian Academy of Sciences
Institute for Theoretical and Experimental Physics
California Institute of Technology
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Kurchatov Institute
University of Belgrade
University of Belgrade
Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT)
Universidad Autónoma de Madrid
University of Oviedo
CSIC-Univ. Cantabria
University of Geneva
Eötvös Loránd University
Paul Scherrer Institut
University of Kansas
ETH Zurich
University of Zurich
National Central University
National Taiwan University
Cukurova University
Mersin University
Middle East Technical University (METU)
Bogazici University
Izmir Institute of Technology
Kafkas University
Suleyman Demirel University
Ege University
Kharkov Institute of Physics and Technology
University of Bristol
CCLRC Rutherford Appleton Laboratory
Imperial College London
Brunel University London
Boston University
Women and Infants Hospital of Rhode Island-Warren Alpert Medical School of Brown University
University of California, Davis
University of California, Los Angeles
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Carnegie Mellon University
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Abstract

Measurements of inclusive charged-hadron transverse-momentum and pseudorapidity distributions are presented for proton-proton collisions at √s = 0.9 and 2.36 TeV. The data were collected with the CMS detector during the LHC commissioning in December 2009. For non-single-diffractive interactions, the average charged-hadron transverse momentum is measured to be 0:46 ± 0:01 (stat.) ± 0.01 (syst.) GeV/c at 0.9 TeV and 0:50 ± 0:01 (stat.) ± 0.01 (syst.) GeV/c at 2.36 TeV, for pseudorapidities between -2:4 and +2:4. At these energies, the measured pseudorapidity densities in the central region, dN_ch/dη| _|η|>0.5, are 3:48±0:02 (stat.) ± 0.13 (syst.) and 4:47±0:04 (stat.) ± 0.16 (syst.), respectively. The results at 0.9 TeV are in agreement with previous measurements and con- firm the expectation of near equal hadron production in pp̄ and pp collisions. The results at 2.36 TeV represent the highest-energy measurements at a particle collider to date.

Original language	English
Article number	41
Journal	Journal of High Energy Physics
Volume	2010
Issue number	2
DOIs	https://doi.org/10.1007/JHEP02(2010)041
Publication status	Published - 1 Jan 2010

Keywords

Hadron-hadron scattering

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10.1007/JHEP02(2010)041

Cite this

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title = "Transverse-momentum and pseudorapidity distributions of charged hadrons in pp collisions at √s = 0.9 and 2.36TeV",

abstract = "Measurements of inclusive charged-hadron transverse-momentum and pseudorapidity distributions are presented for proton-proton collisions at √s = 0.9 and 2.36 TeV. The data were collected with the CMS detector during the LHC commissioning in December 2009. For non-single-diffractive interactions, the average charged-hadron transverse momentum is measured to be 0:46 ± 0:01 (stat.) ± 0.01 (syst.) GeV/c at 0.9 TeV and 0:50 ± 0:01 (stat.) ± 0.01 (syst.) GeV/c at 2.36 TeV, for pseudorapidities between -2:4 and +2:4. At these energies, the measured pseudorapidity densities in the central region, dNch/dη| |η|>0.5, are 3:48±0:02 (stat.) ± 0.13 (syst.) and 4:47±0:04 (stat.) ± 0.16 (syst.), respectively. The results at 0.9 TeV are in agreement with previous measurements and con- firm the expectation of near equal hadron production in p{\=p} and pp collisions. The results at 2.36 TeV represent the highest-energy measurements at a particle collider to date.",

keywords = "Hadron-hadron scattering",

author = "\{CMS Collaboration\} and V. Khachatryan and Sirunyan, \{A. M.\} and A. Tumasyan and W. Adam and T. Bergauer and M. Dragicevic and J. Er{\"o} and M. Friedl and R. Fr{\"u}hwirth and Ghete, \{V. M.\} and J. Hammer and S. H{\"a}nsel and M. Hoch and N. H{\"o}rmann and J. Hrubec and M. Jeitler and G. Kasieczka and M. Krammer and D. Liko and I. Mikulec and M. Pernicka and H. Rohringer and R. Sch{\"o}fbeck and J. Strauss and A. Taurok and F. Teischinger and W. Waltenberger and G. Walzel and E. Widl and Wulz, \{C. E.\} and V. Mossolov and N. Shumeiko and \{Suarez Gonzalez\}, J. and L. Benucci and \{De Wolf\}, \{E. A.\} and M. Hashemi and X. Janssen and T. Maes and L. Mucibello and S. Ochesanu and R. Rougny and M. Selvaggi and \{Van Haevermaet\}, H. and \{Van Mechelen\}, P. and \{Van Remortel\}, N. and \{de Cassagnac\}, \{R. Granier\} and P. Paganini and C. Thiebaux and A. Zabi and F. Beaudette",

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AU - CMS Collaboration

AU - Khachatryan, V.

AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Bergauer, T.

AU - Dragicevic, M.

AU - Erö, J.

AU - Friedl, M.

AU - Frühwirth, R.

AU - Ghete, V. M.

AU - Hammer, J.

AU - Hänsel, S.

AU - Hoch, M.

AU - Hörmann, N.

AU - Hrubec, J.

AU - Jeitler, M.

AU - Kasieczka, G.

AU - Krammer, M.

AU - Liko, D.

AU - Mikulec, I.

AU - Pernicka, M.

AU - Rohringer, H.

AU - Schöfbeck, R.

AU - Strauss, J.

AU - Taurok, A.

AU - Teischinger, F.

AU - Waltenberger, W.

AU - Walzel, G.

AU - Widl, E.

AU - Wulz, C. E.

AU - Mossolov, V.

AU - Shumeiko, N.

AU - Suarez Gonzalez, J.

AU - Benucci, L.

AU - De Wolf, E. A.

AU - Hashemi, M.

AU - Janssen, X.

AU - Maes, T.

AU - Mucibello, L.

AU - Ochesanu, S.

AU - Rougny, R.

AU - Selvaggi, M.

AU - Van Haevermaet, H.

AU - Van Mechelen, P.

AU - Van Remortel, N.

AU - de Cassagnac, R. Granier

AU - Paganini, P.

AU - Thiebaux, C.

AU - Zabi, A.

AU - Beaudette, F.

PY - 2010/1/1

Y1 - 2010/1/1

N2 - Measurements of inclusive charged-hadron transverse-momentum and pseudorapidity distributions are presented for proton-proton collisions at √s = 0.9 and 2.36 TeV. The data were collected with the CMS detector during the LHC commissioning in December 2009. For non-single-diffractive interactions, the average charged-hadron transverse momentum is measured to be 0:46 ± 0:01 (stat.) ± 0.01 (syst.) GeV/c at 0.9 TeV and 0:50 ± 0:01 (stat.) ± 0.01 (syst.) GeV/c at 2.36 TeV, for pseudorapidities between -2:4 and +2:4. At these energies, the measured pseudorapidity densities in the central region, dNch/dη| |η|>0.5, are 3:48±0:02 (stat.) ± 0.13 (syst.) and 4:47±0:04 (stat.) ± 0.16 (syst.), respectively. The results at 0.9 TeV are in agreement with previous measurements and con- firm the expectation of near equal hadron production in pp̄ and pp collisions. The results at 2.36 TeV represent the highest-energy measurements at a particle collider to date.

AB - Measurements of inclusive charged-hadron transverse-momentum and pseudorapidity distributions are presented for proton-proton collisions at √s = 0.9 and 2.36 TeV. The data were collected with the CMS detector during the LHC commissioning in December 2009. For non-single-diffractive interactions, the average charged-hadron transverse momentum is measured to be 0:46 ± 0:01 (stat.) ± 0.01 (syst.) GeV/c at 0.9 TeV and 0:50 ± 0:01 (stat.) ± 0.01 (syst.) GeV/c at 2.36 TeV, for pseudorapidities between -2:4 and +2:4. At these energies, the measured pseudorapidity densities in the central region, dNch/dη| |η|>0.5, are 3:48±0:02 (stat.) ± 0.13 (syst.) and 4:47±0:04 (stat.) ± 0.16 (syst.), respectively. The results at 0.9 TeV are in agreement with previous measurements and con- firm the expectation of near equal hadron production in pp̄ and pp collisions. The results at 2.36 TeV represent the highest-energy measurements at a particle collider to date.

KW - Hadron-hadron scattering

U2 - 10.1007/JHEP02(2010)041

DO - 10.1007/JHEP02(2010)041

M3 - Article

AN - SCOPUS:84856375650

SN - 1126-6708

VL - 2010

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 2

M1 - 41

ER -

Transverse-momentum and pseudorapidity distributions of charged hadrons in pp collisions at √s = 0.9 and 2.36TeV

Abstract

Keywords

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