Transverse-Momentum and Pseudorapidity Distributions of Charged Hadrons in pp Collisions at √s=7 TeV

被引：429

作者：

Khachatryan, V. ^{[1
]}

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

Tumasyan, A. ^{[1
]}

Adam, W. ^{[2
,176
]}

Bergauer, T. ^{[2
,176
]}

Dragicevic, M. ^{[2
,176
]}

Eroe, J. ^{[2
,176
]}

Fabjan, C. ^{[2
,176
]}

Friedl, M. ^{[2
,176
]}

Fruehwirth, R. ^{[2
,176
]}

Ghete, V. M. ^{[2
,176
]}

Hammer, J. ^{[2
,176
]}

Haensel, S. ^{[2
,176
]}

Hoch, M. ^{[2
,176
]}

Hoermann, N. ^{[2
,176
]}

Hrubec, J. ^{[2
,176
]}

Jeitler, M. ^{[2
,176
]}

Kasieczka, G. ^{[2
,176
]}

Kiesenhofer, W. ^{[2
,176
]}

Krammer, M. ^{[2
,176
]}

Liko, D. ^{[2
,176
]}

Mikulec, I. ^{[2
,176
]}

Pernicka, M. ^{[2
,176
]}

Rohringer, H. ^{[2
,176
]}

Schoefbeck, R. ^{[2
,176
]}

Strauss, J. ^{[2
,176
]}

Taurok, A. ^{[2
,176
]}

Teischinger, F. ^{[2
,176
]}

Waltenberger, W. ^{[2
,176
]}

Walzel, G. ^{[2
,176
]}

Widl, E. ^{[2
,176
]}

Wulz, C. -E. ^{[2
,176
]}

Mossolov, V. ^{[177
]}

Shumeiko, N. ^{[177
]}

Gonzalez, J. Suarez ^{[177
]}

Benucci, L. ^{[178
]}

Ceard, L. ^{[178
]}

De Wolf, E. A. ^{[178
]}

Hashemi, M. ^{[178
]}

Janssen, X. ^{[178
]}

Maes, T. ^{[178
]}

Mucibello, L. ^{[178
]}

Ochesanu, S. ^{[178
]}

Roland, B. ^{[178
]}

Rougny, R. ^{[178
]}

Selvaggi, M. ^{[48
,49
,178
]}

Van Haevermaet, H. ^{[178
]}

Van Mechelen, P. ^{[178
]}

Van Remortel, N. ^{[178
]}

Adler, V. ^{[179
]}

机构：

[1] Yerevan Phys Inst, Yerevan 375036, Armenia

[2] OeAW, Inst Hochenergiephys, Vienna, Austria

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

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

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

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

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

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

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

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

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

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

[13] Univ Los Andes, Bogota, Colombia

[14] Tech Univ Split, Split, Croatia

[15] Univ Split, Split, Croatia

[16] Rudjer Boskovic Inst, Zagreb, Croatia

[17] Univ Cyprus, Nicosia, Cyprus

[18] Acad Sci Res & Technol,Arab Republ Egypt, Egyptian Network High Energy Phys, Cairo, Egypt

[19] NICPB, Tallinn, Estonia

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

[21] Helsinki Inst Phys, Helsinki, Finland

[22] Lappeenranta Univ Technol, Lappeenranta, Finland

[23] CNRS, IN2P3, Lab Annecy Vieux Phys Particules, Annecy, France

[24] CEA Saclay, DSM IRFU, Gif Sur Yvette, France

[25] CNRS, IN2P3, Ecole Polytechn, Lab Leprince Ringuet, Palaiseau, France

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

[27] IN2P3, Ctr Calcul, Villeurbanne, France

[28] Univ Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, F-69622 Villeurbanne, France

[29] Acad Sci, E Andronikashvili Inst Phys, Tbilisi, Georgia

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

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

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

[33] DESY, D-2000 Hamburg, Germany

[34] Univ Hamburg, Hamburg, Germany

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

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

[37] Univ Athens, Athens, Greece

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

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

[40] Inst Nucl Res ATOMKI, Debrecen, Hungary

[41] Univ Debrecen, Debrecen, Hungary

[42] Panjab Univ, Chandigarh 160014, India

[43] Univ Delhi, Delhi 110007, India

[44] Bhabha Atom Res Ctr, Mumbai 400085, Maharashtra, India

[45] Tata Inst Fundamental Res EHEP, Mumbai, Maharashtra, India

[46] Tata Inst Fundamental Res HECR, Mumbai, Maharashtra, India

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

[48] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy

[49] Univ Bari, Bari, Italy

[50] Ist Nazl Fis Nucl, Sez Bologna, I-40126 Bologna, Italy

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 02期

基金：

美国国家科学基金会; 芬兰科学院; 巴西圣保罗研究基金会;

关键词：

PARTICLES; DEPENDENCE;

D O I：

10.1103/PhysRevLett.105.022002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Charged-hadron transverse-momentum and pseudorapidity distributions in proton-proton collisions at root s = 7 TeV are measured with the inner tracking system of the CMS detector at the LHC. The charged-hadron yield is obtained by counting the number of reconstructed hits, hit pairs, and fully reconstructed charged-particle tracks. The combination of the three methods gives a charged-particle multiplicity per unit of pseudorapidity dN(ch)/d eta vertical bar(vertical bar eta vertical bar<0.5) = 5.78 +/- 0.01(stat) +/- 0.23(stat) for non-single-diffractive events, higher than predicted by commonly used models. The relative increase in charged-particle multiplicity from root s = 0.9 to 7 TeV is [66.1 +/- 1.0(stat) +/- 4.2(syst)]%. The mean transverse momentum is measured to be 0.545 +/- 0.005(stat) +/- 0.015(syst) GeV/c. The results are compared with similar measurements at lower energies.

引用

页数：14

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