Charged-particle multiplicities in pp interactions measured with the ATLAS detector at the LHC

被引：352

作者：

Aad, G. ^{[1
]}

Abbott, B. ^{[133
]}

Abdallah, J.

Abdelalim, A. A. ^{[63
]}

Abdesselam, A. ^{[140
]}

Abdinov, O. ^{[15
]}

Abi, B. ^{[134
]}

Abolins, M. ^{[107
]}

Abramowicz, H. ^{[186
]}

Abreu, H. ^{[137
]}

Acerbi, E. ^{[108
,109
]}

Acharya, B. S. ^{[199
,200
]}

Ackers, M. ^{[28
]}

Adams, D. L. ^{[33
]}

Addy, T. N. ^{[72
]}

Adelman, J. ^{[214
]}

Aderholz, M. ^{[119
]}

Adomeit, S. ^{[118
]}

Adragna, P. ^{[94
]}

Adye, T. ^{[155
]}

Aefsky, S. ^{[30
]}

Aguilar-Saavedra, J. A. ^{[149
,150
]}

Aharrouche, M. ^{[100
]}

Ahlen, S. P. ^{[29
]}

Ahles, F. ^{[1
]}

Ahmad, A. ^{[181
]}

Ahsan, M. ^{[55
]}

Aielli, G. ^{[160
,161
]}

Akdogan, T. ^{[24
]}

Akesson, T. P. A. ^{[98
]}

Akimoto, G. ^{[188
,189
]}

Akimov, A. V. ^{[114
]}

Alam, M. S. ^{[2
]}

Alam, M. A. ^{[95
]}

Albrand, S. ^{[70
,71
]}

Aleksa, M.

Aleksandrov, I. N. ^{[83
]}

Aleppo, M. ^{[108
,109
]}

Alessandria, F. ^{[108
]}

Alexa, C. ^{[34
]}

Alexander, G. ^{[186
]}

Alexandre, G. ^{[63
]}

Alexopoulos, T. ^{[14
]}

Alhroob, M. ^{[28
]}

Aliev, M. ^{[21
]}

Alimonti, G. ^{[108
]}

Alison, J. ^{[143
]}

Aliyev, M. ^{[15
]}

Allport, P. P. ^{[90
]}

Allwood-Spiers, S. E. ^{[68
]}

机构：

[1] Univ Freiburg, Fak Math & Phys, Hermann Herder Str 3, D-79104 Freiburg Ibr, Germany

[2] SUNY Albany, Albany, NY 12222 USA

[3] Univ Alberta, Dept Phys, Ctr Particle Phys, Edmonton, AB T6G 2G7, Canada

[4] Ankara Univ, Fac Sci, Dept Phys, TR-061000 Ankara, Turkey

[5] Dumlupinar Univ, Fac Arts & Sci, Dept Phys, Kutahya, Turkey

[6] Gazi Univ, Fac Arts & Sci, Dept Phys, TR-06500 Ankara, Turkey

[7] TOBB Univ Econ & Technol, Fac Arts & Sci, Div Phys, TR-06560 Ankara, Turkey

[8] Turkish Atom Energy Commiss, TR-06530 Ankara, Turkey

[9] Univ Savoie, LAPP, CNRS IN2P3, Annecy Le Vieux, France

[10] Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA

[11] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA

[12] Univ Texas Arlington, Dept Phys, Arlington, TX 76019 USA

[13] Univ Athens, Dept Phys, GR-15771 Athens, Greece

[14] Natl Tech Univ Athens, Dept Phys, GR-15780 Zografos, Greece

[15] Azerbaijan Acad Sci, Inst Phys, AZ-143 Baku, Azerbaijan

[16] Univ Autonoma Barcelona, Inst Fis Altes Energies, IFAE, ES-08193 Bellaterra, Barcelona, Spain

[17] Univ Belgrade, Inst Phys, Belgrade 11001, Serbia

[18] Vinca Inst Nucl Sci, Belgrade 11000, Serbia

[19] Univ Bergen, Dept Phys & Technol, NO-5007 Bergen, Norway

[20] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Phys, Berkeley, CA 94720 USA

[21] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

[22] Univ Bern, Albert Einstein Ctr Fundamental Phys, High Energy Phys Lab, CH-3012 Bern, Switzerland

[23] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England

[24] Bogazici Univ, Fac Sci, Dept Phys, TR-80815 Bebek, Turkey

[25] Dogus Univ, Fac Arts & Sci, Dept Phys, TR-34722 Istanbul, Turkey

[26] Gaziantep Univ, Fac Engn, Dept Engn Phys, TR-27310 Sehitkamil, Gaziantep, Turkey

[27] INFN Sez Bologna, IT-40127 Bologna, Italy

[28] Univ Bonn, Inst Phys, D-53115 Bonn, Germany

[29] Boston Univ, Dept Phys, Boston, MA 02215 USA

[30] Brandeis Univ, Dept Phys, Waltham, MA 02454 USA

[31] Univ Fed Rio de Janeiro, COPPE EE IF, BR-21945970 Rio De Janeiro, Brazil

[32] Univ Sao Paulo, Inst Fis, BR-05508900 Sao Paulo, Brazil

[33] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

[34] Natl Inst Phys & Nucl Engn, R-077125 Bucharest, Romania

[35] Univ Politehn Bucuresti, Rectorat AN 001, Sector 6, Bucharest 060042, Romania

[36] Univ Buenos Aires, FCEyN, RA-1428 Buenos Aires, DF, Argentina

[37] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[38] Carleton Univ, Dept Phys, Ottawa, ON K1S 5B6, Canada

[39] CERN, CH-1211 Geneva, Switzerland

[40] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

[41] Pontificia Univ Catolica Chile, Fac Fis, Dept Fis, Santiago 4860, Chile

[42] Univ Tecn Federico Santa Maria, Dept Fis, Valparaiso, Chile

[43] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

[44] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, CN Anhui, Peoples R China

[45] Nanjing Univ, Dept Phys, Nanjing 210093, CN Jiangsu, Peoples R China

[46] Shandong Univ, High Energy Phys Grp, Jinan 250100, CN Shandong, Peoples R China

[47] Univ Blaise Pascal, Lab Phys Corpusculaire, Clermont Univ, FR-63177 Aubiere, France

[48] Columbia Univ, Nevis Lab, Irvington, NY 10533 USA

[49] Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen 0, Denmark

[50] INFN Grp Collegato Cosenza, IT-87036 Arcavacata Di Rende, Italy

来源：

NEW JOURNAL OF PHYSICS | 2011年 / 13卷

基金：

美国国家科学基金会; 巴西圣保罗研究基金会; 加拿大自然科学与工程研究理事会;

关键词：

TRANSVERSE-MOMENTUM SPECTRA; SQUARE-ROOT-S; CM ENERGIES; DISTRIBUTIONS; COLLISIONS;

D O I：

10.1088/1367-2630/13/5/053033

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Measurements are presented from proton-proton collisions at centre-of-mass energies of root s = 0.9, 2.36 and 7 TeV recorded with the ATLAS detector at the LHC. Events were collected using a single-arm minimum-bias trigger. The charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity and the relationship between the mean transverse momentum and charged-particle multiplicity are measured. Measurements in different regions of phase space are shown, providing diffraction-reduced measurements as well as more inclusive ones. The observed distributions are corrected to well-defined phase-space regions, using model-independent corrections. The results are compared to each other and to various Monte Carlo (MC) models, including a new AMBT1 pythia6 tune. In all the kinematic regions considered, the particle multiplicities are higher than predicted by the MC models. The central charged-particle multiplicity per event and unit of pseudorapidity, for tracks with p(T) > 100 MeV, is measured to be 3.483 +/- 0.009 (stat) +/- 0.106 (syst) at root s = 0.9 TeV and 5.630 +/- 0.003 (stat) +/- 0.169 (syst) at root s = 7 TeV.

引用

页数：68

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