Charged-particle multiplicities in pp interactions at √s=900 GeV measured with the ATLAS detector at the LHC ATLAS Collaboration

被引：186

作者：

Aad, G. ^{[1
]}

Abat, E. ^{[25
]}

Abbott, B. ^{[133
]}

Abdallah, J. ^{[16
]}

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

Abdesselam, A. ^{[136
,140
,157
]}

Abdinov, O. ^{[15
]}

Abi, B. ^{[134
]}

Abolins, M. ^{[108
]}

Abramowicz, H. ^{[185
]}

Abreu, H. ^{[137
]}

Acerbi, E. ^{[109
,110
]}

Acharya, B. S. ^{[198
,199
]}

Ackers, M. ^{[30
]}

Adams, D. L. ^{[34
]}

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

Adelman, J. ^{[212
]}

Aderholz, M. ^{[120
]}

Adorisio, C. ^{[50
,51
]}

Adragna, P. ^{[95
]}

Adye, T. ^{[154
]}

Aefsky, S. ^{[32
]}

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

Aharrouche, M. ^{[101
]}

Ahlen, S. P. ^{[31
]}

Ahles, F. ^{[1
]}

Ahmad, A. ^{[180
]}

Ahmed, H. ^{[3
]}

Ahsan, M. ^{[55
]}

Aielli, G. ^{[159
,160
]}

Akdogan, T. ^{[25
]}

Akesson, P. F. ^{[39
]}

Akesson, T. P. A. ^{[99
]}

Akimoto, G. ^{[187
,188
]}

Akimov, A. V. ^{[115
]}

Aktas, A. ^{[1
]}

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

Alam, M. A. ^{[96
]}

Albert, J. ^{[206
]}

Albrand, S. ^{[71
]}

Aleksa, M. ^{[39
]}

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

Aleppo, M. ^{[109
,110
]}

Alessandria, F. ^{[109
]}

Alexa, C.

Alexander, G. ^{[185
]}

Alexandre, G. ^{[63
]}

Alexopoulos, T. ^{[14
]}

Alhroob, M. ^{[30
]}

Aliev, M. ^{[22
]}

机构：

[1] Univ Freiburg, Fak Math & Phys, D-79104 Freiburg, 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, 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, Baku 143, Azerbaijan

[16] Univ Autonoma Barcelona, IFAE, ES-08193 Bellaterra, Barcelona, Spain

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

[18] Vinca Inst Nucl Sci, Belgrade 11001, Serbia

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

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

[21] Univ Calif Berkeley, Div Phys, Berkeley, CA 94720 USA

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

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

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

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

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

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

[28] Ist Nazl Fis Nucl, Sez Bologna, IT-40127 Bologna, Italy

[29] Univ Bologna, Dipartimento Fis, IT-40127 Bologna, Italy

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

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

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

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

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

[35] Univ Politehn Bucuresti, Bucharest 060042, Romania

[36] Univ Buenos Aires, FCEyN, Dto Fis, 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 23, Switzerland

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

[41] Pontificia Univ Catolica Chile, Fac Fis, Dept Fis, Santiago 22, Chile

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

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

[44] USTC, Dept Modern Phys, Hefei 230026, CN Anhui, Peoples R China

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

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

[47] Univ Blaise Pascal, CNRS, IN2P3, 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 O, Denmark

[50] Ist Nazl Fis Nucl, Grp Coll Cosenza, IT-87036 Arcavacata Di Rende, Italy

来源：

PHYSICS LETTERS B | 2010年 / 688卷 / 01期

基金：

瑞典研究理事会; 瑞士国家科学基金会; 英国科学技术设施理事会; 加拿大自然科学与工程研究理事会;

关键词：

Charged-particle; Multiplicities; 900; GeV; ATLAS; LHC; Minimum bias; TRANSVERSE-MOMENTUM SPECTRA; SQUARE-ROOT-S; CM ENERGIES; DISTRIBUTIONS; COLLISIONS; MASS;

D O I：

10.1016/j.physletb.2010.03.064

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The first measurements from proton-proton collisions recorded with the ATLAS detector at the LHC are presented. Data were collected in December 2009 using a minimum-bias trigger during collisions at a centre-of-mass energy of 900 GeV. The charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity, and the relationship between mean transverse momentum and charged-particle multiplicity are measured for events with at least one charged particle in the kinematic range vertical bar eta vertical bar < 2.5 and p(T) > 500 MeV. The measurements are compared to Monte Carlo models of proton-proton collisions and to results from other experiments at the same centre-of-mass energy. The charged-particle multiplicity per event and unit of pseudorapidity eta = 0 is measured to be 1.333 +/- 0.003(stat.) +/- 0.040(syst.), which is 5-15% higher than the Monte Carlo models predict. 2010 Published by Elsevier B.V.

引用

页码：21 / 42

页数：22

共 14 条

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Aad, G.
Abbott, B.
Abdallah, J.
Abdelalim, A. A.
Abdesselam, A.
Abdinov, O.
Abi, B.
Abolins, M.
Abramowicz, H.
Abreu, H.
Acerbi, E.
Acharya, B. S.
Ackers, M.
Adams, D. L.
Addy, T. N.
Adelman, J.
Aderholz, M.
Adomeit, S.
Adragna, P.
Adye, T.
Aefsky, S.
Aguilar-Saavedra, J. A.
Aharrouche, M.
Ahlen, S. P.
Ahles, F.
Ahmad, A.
Ahsan, M.
Aielli, G.
Akdogan, T.
Akesson, T. P. A.
Akimoto, G.
Akimov, A. V.
Alam, M. S.
Alam, M. A.
Albrand, S.
Aleksa, M.
Aleksandrov, I. N.
Aleppo, M.
Alessandria, F.
Alexa, C.
Alexander, G.
Alexandre, G.
Alexopoulos, T.
Alhroob, M.
Aliev, M.
Alimonti, G.
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