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

被引：0

作者：

Khachatryan, V. ^{[1
]}

Sirunyan, A. M. ^{[1
]}

Tumasyan, A. ^{[1
]}

Adam, W. ^{[2
]}

Bergauer, T. ^{[2
]}

Dragicevic, M. ^{[2
]}

Ero, J. ^{[2
]}

Friedl, M. ^{[2
]}

Fruehwirth, R. ^{[2
]}

Ghete, V. M. ^{[2
]}

Hammer, J. ^{[2
]}

Haensel, S. ^{[2
]}

Hoch, M. ^{[2
]}

Hoermann, N. ^{[2
]}

Hrubec, J. ^{[2
]}

Jeitler, M. ^{[2
]}

Kasieczka, G. ^{[2
]}

Krammer, M. ^{[2
]}

Liko, D. ^{[2
]}

Mikulec, I. ^{[2
]}

Pernicka, M. ^{[2
]}

Rohringer, H. ^{[2
]}

Schoefbeck, R. ^{[2
]}

Strauss, J. ^{[2
]}

Taurok, A. ^{[2
]}

Teischinger, F. ^{[2
]}

Waltenberger, W. ^{[2
]}

Walzel, G. ^{[2
]}

Widl, E. ^{[2
]}

Wulz, C. -E. ^{[2
]}

Mossolov, V. ^{[3
]}

Shumeiko, N. ^{[3
]}

Gonzalez, J. Suarez ^{[3
]}

Benucci, L. ^{[4
]}

De Wolf, E. A. ^{[4
]}

Hashemi, M. ^{[4
]}

Janssen, X. ^{[4
]}

Maes, T. ^{[4
]}

Mucibello, L. ^{[4
]}

Ochesanu, S. ^{[4
]}

Rougny, R. ^{[4
]}

Selvaggi, M. ^{[4
]}

Van Haevermaet, H. ^{[4
]}

Van Mechelen, P. ^{[4
]}

Van Remortel, N. ^{[4
]}

Adler, V. ^{[5
]}

Beauceron, S. ^{[5
]}

D'Hondt, J. ^{[5
]}

Devroede, O. ^{[5
]}

Kalogeropoulos, A. ^{[5
]}

机构：

[1] Yerevan Phys Inst, Yerevan 375036, Armenia

[2] OeAW, Inst Hochenergiephys, Vienna, Austria

[3] Natl Ctr Particle & High Energy Phys, Minsk, BELARUS

[4] Univ Antwerp, B-2020 Antwerp, Belgium

[5] Vrije Univ Brussel, Brussels, Belgium

[6] Univ Libre Bruxelles, Brussels, Belgium

[7] Univ Ghent, B-9000 Ghent, Belgium

[8] Catholic Univ Louvain, B-1348 Louvain, Belgium

[9] Univ Mons, B-7000 Mons, Belgium

[10] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil

[11] Univ Estado Rio de Janeiro, BR-20550011 Rio De Janeiro, Brazil

[12] Univ Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, Brazil

[13] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria

[14] Univ Sofia, BU-1126 Sofia, Bulgaria

[15] Inst High Energy Phys, Beijing 100039, Peoples R China

[16] Peking Univ, State Key Lab Nucl Phys & Tech, Beijing 100871, Peoples R China

[17] Univ Los Andes, Bogota, Colombia

[18] Tech Univ Split, Split, Croatia

[19] Univ Split, Split, Croatia

[20] Rudjer Boskovic Inst, Zagreb, Croatia

[21] Univ Cyprus, Nicosia, Cyprus

[22] NICPB, Tallinn, Estonia

[23] Univ Helsinki, Dept Phys, Helsinki, Finland

[24] Helsinki Inst Phys, Helsinki, Finland

[25] Lappeenranta Univ Technol, Lappeenranta, Finland

[26] CNRS, IN2P3, Lab Annecy Le Vieux Phys Particules, Annecy Le Vieux, France

[27] CEA Saclay, DSM IRFU, F-91191 Gif Sur Yvette, France

[28] Ecole Polytech, CNRS, Lab Leprince Ringuet, IN2P3, F-91128 Palaiseau, France

[29] Univ Haute Alsace Mulhouse, Univ Strasbourg, Inst Pluridisciplinaire Hubert Curien, CNRS,IN2P3, Strasbourg, France

[30] Univ Lyon 1, Univ Lyon, CNRS, Inst Phys Nucl Lyon,IN2P3, Villeurbanne, France

[31] Georgian Acad Sci, E Andronikashvili Inst Phys, GE-380060 Tbilisi, Georgia

[32] Rhein Westfal TH Aachen, Inst Phys 1, Aachen, Germany

[33] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany

[34] Rhein Westfal TH Aachen, Phys Inst B 3, Aachen, Germany

[35] DESY, Hamburg, Germany

[36] Univ Hamburg, Hamburg, Germany

[37] Univ Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, Germany

[38] Inst Nucl Phys Demokritos, Aghia Paraskevi, Greece

[39] Univ Athens, Athens, Greece

[40] Univ Ioannina, GR-45110 Ioannina, Greece

[41] KFKI Res Inst Particle & Nucl Phys, Budapest, Hungary

[42] Inst Nucl Res ATOMKI, Debrecen, Hungary

[43] Univ Debrecen, Debrecen, Hungary

[44] Panjab Univ, Chandigarh 160014, India

[45] Univ Delhi, Delhi 110007, India

[46] Bhabha Atom Res Ctr, Bombay 400085, Maharashtra, India

[47] Tata Inst Fundamental Res EHEP, Bombay, Maharashtra, India

[48] Tata Inst Fundamental Res HECR, Bombay, Maharashtra, India

[49] Inst Studies Theoret Phys & Math IPM, Tehran, Iran

[50] Univ Coll Dublin, Dublin 2, Ireland

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2010年 / 02期

基金：

巴西圣保罗研究基金会; 美国国家科学基金会; 芬兰科学院;

关键词：

Hadron-Hadron Scattering; SQUARE-ROOT-S; PARTICLE MULTIPLICITY; CM ENERGIES; DIFFRACTION; DEPENDENCE;

D O I：

10.1007/JHEP02(2010)041

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

Measurements of inclusive charged-hadron transverse-momentum and pseudorapidity distributions are presented for proton-proton collisions at root 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)/d eta vertical bar(vertical bar eta vertical bar<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 confirm the expectation of near equal hadron production in p<(p)over bar> and pp collisions. The results at 2.36 TeV represent the highest-energy measurements at a particle collider to date.

引用

页数：35

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