Rapidity and transverse momentum dependence of inclusive J/ψ production in pp collisions at √s=7 TeV

被引：130

作者：

Aamodt, K. ^{[2
]}

Quintana, A. Abrahantes ^{[3
]}

Adamova, D. ^{[4
]}

Adare, A. M. ^{[5
]}

Aggarwal, M. M. ^{[6
]}

Rinella, G. Aglieri ^{[7
]}

Agocs, A. G. ^{[8
]}

Agostinelli, A. ^{[9
,10
]}

Aguilar Salazar, S. ^{[11
]}

Ahammed, Z. ^{[12
]}

Ahmad, N. ^{[13
]}

Masoodi, A. Ahmad ^{[13
]}

Ahn, S. U. ^{[14
,41
]}

Akindinov, A. ^{[15
]}

Aleksandrov, D. ^{[16
]}

Alessandro, B. ^{[1
]}

Alfaro Molina, R. ^{[11
]}

Alici, A. ^{[17
,134
]}

Alkin, A. ^{[18
]}

Almaraz Avina, E. ^{[11
]}

Alme, J. ^{[19
]}

Alt, T. ^{[20
]}

Altini, V. ^{[7
,21
,22
]}

Altsybeev, I. ^{[23
]}

Andrei, C. ^{[24
]}

Andronic, A. ^{[25
,26
]}

Anguelov, V. ^{[20
]}

Anson, C. ^{[27
]}

Anticic, T. ^{[28
]}

Antinori, F. ^{[29
]}

Antonioli, P. ^{[30
]}

Aphecetche, L. ^{[31
]}

Appelshaeuser, H. ^{[32
]}

Arbor, N. ^{[33
]}

Arcelli, S. ^{[9
,10
]}

Arend, A. ^{[32
]}

Armesto, N. ^{[34
,35
]}

Arnaldi, R. ^{[1
]}

Aronsson, T. ^{[5
]}

Arsene, I. C. ^{[25
,26
]}

Asryan, A. ^{[23
]}

Augustinus, A. ^{[7
]}

Averbeck, R. ^{[25
,26
]}

Awes, T. C. ^{[36
]}

Aysto, J. ^{[37
,38
]}

Azmi, M. D. ^{[13
]}

Bach, M. ^{[20
]}

Badala, A. ^{[39
]}

Baek, Y. W. ^{[14
,41
]}

Bailhache, R. ^{[32
]}

机构：

[1] Sezione Ist Nazl Fis Nucl, Turin, Italy

[2] Univ Bergen, Dept Phys & Technol, Bergen, Norway

[3] Ctr Aplicac Tecnol & Desarrollo Nucl CEADEN, Havana, Cuba

[4] Acad Sci Czech Republ, Inst Nucl Phys, Prague, Czech Republic

[5] Yale Univ, New Haven, CT USA

[6] Panjab Univ, Dept Phys, Chandigarh 160014, India

[7] CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland

[8] Hungarian Acad Sci, KFKI Res Inst Particle & Nucl Phys, Budapest, Hungary

[9] Univ Bologna, Dipartimento Fis, Bologna, Italy

[10] Sezione Ist Nazl Fis Nucl, Bologna, Italy

[11] Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico

[12] Ctr Variable Energy Cyclotron, Kolkata, India

[13] Aligarh Muslim Univ, Dept Phys, Aligarh 202002, Uttar Pradesh, India

[14] Gangneung Wonju Natl Univ, Kangnung, South Korea

[15] Inst Theoret & Expt Phys, Moscow 117259, Russia

[16] Russian Res Ctr Kurchatov Inst, Moscow, Russia

[17] Ctr Fermi Ctr Studi & Ric, Rome, Italy

[18] Bogolyubov Inst Theoret Phys, Kiev, Ukraine

[19] Bergen Univ Coll, Fac Engn, Bergen, Norway

[20] Goethe Univ Frankfurt, Frankfurt Inst Adv Studies, Frankfurt, Germany

[21] Dipartimento Interateneo Fis M Merlin, Bari, Italy

[22] Sezione Ist Nazl Fis Nucl, Bari, Italy

[23] St Petersburg State Univ, V Fock Inst Phys, St Petersburg, Russia

[24] Natl Inst Phys & Nucl Engn, Bucharest, Romania

[25] GSI Helmholtzzentrum Schwerionenforsch, Div Res, Darmstadt, Germany

[26] GSI Helmholtzzentrum Schwerionenforsch, ExtreMe Matter Inst EMMI, Darmstadt, Germany

[27] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

[28] Rudjer Boskovic Inst, Zagreb, Croatia

[29] Sezione Ist Nazl Fis Nucl, Padua, Italy

[30] Sezione Ist Nazl Fis Nucl, Bologna, Italy

[31] Univ Nantes, CNRS IN2P3, Ecole Mines Nantes, SUBATECH, Nantes, France

[32] Goethe Univ Frankfurt, Inst Kernphys, D-6000 Frankfurt, Germany

[33] Univ Grenoble 1, CNRS IN2P3, LPSC, Inst Polytech Grenoble, Grenoble, France

[34] Univ Santiago de Compostela, Dept Fis Particulas, Santiago De Compostela, Spain

[35] Univ Santiago de Compostela, IGFAE, Santiago De Compostela, Spain

[36] Oak Ridge Natl Lab, Oak Ridge, TN USA

[37] Helsinki Inst Phys, Jyvaskyla, Finland

[38] Univ Jyvaskyla, Jyvaskyla, Finland

[39] Sezione Ist Nazl Fis Nucl, Catania, Italy

[40] IRFU, Commissariat Energie Atom, Saclay, France

[41] Univ Blaise Pascal, Clermont Univ, LPC, CNRS IN2P3, Clermont Ferrand, France

[42] Slovak Acad Sci, Inst Expt Phys, Kosice 04353, Slovakia

[43] Univ Catania, Dipartimento Fis & Astron, Catania, Italy

[44] Sezione Ist Nazl Fis Nucl, Catania, Italy

[45] Univ Birmingham, Sch Phys & Astron, Birmingham, W Midlands, England

[46] Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Krakow, Poland

[47] Univ Munster, Inst Kernphys, D-4400 Munster, Germany

[48] Joint Inst Nucl Res, Dubna, Russia

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

[50] Univ Strasbourg, IPHC, CNRS IN2P3, Strasbourg, France

来源：

PHYSICS LETTERS B | 2011年 / 704卷 / 05期

基金：

新加坡国家研究基金会; 瑞典研究理事会; 英国科学技术设施理事会; 美国国家科学基金会; 美国能源部; 欧洲研究理事会; 巴西圣保罗研究基金会; 中国国家自然科学基金; 芬兰科学院;

关键词：

PROTON-PROTON COLLISIONS; P(P)OVER-BAR COLLISIONS; ALICE; DETECTOR; PROMPT;

D O I：

10.1016/j.physletb.2011.09.054

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The ALICE experiment at the LHC has studied inclusive J/psi production at central and forward rapidities in pp collisions at root s = 7 TeV. In this Letter, we report on the first results obtained detecting the J/psi through the dilepton decay into e(+)e(-) and mu(+)mu(-) pairs in the rapidity ranges vertical bar y vertical bar < 0.9 and 2.5 < y < 4, respectively, and with acceptance down to zero PT. In the dielectron channel the analysis was carried Out on a data sample corresponding to an integrated luminosity L-int = 5.6 nb(-1) and the number of signal events is N-J/psi = 352 +/- 32 (stat.) +/- 28 (syst.): the corresponding figures in the dimuon channel are L-int = 15.6 nb(-1) and N-J/psi = 1924 +/- 77 (stat.) +/- 144 (syst.). The measured production cross sections are sigma(J/psi) (vertical bar y vertical bar < 0.9) = 10.7 +/- 1.0 (stat.) +/- 1.6 (syst.)(-2.3)(+1.6) (syst.pol.) mu b and sigma(J/psi) (2.5 < y < 4) = 6.31 +/- 0.25 (stat.) +/- 0.76 (syst.)(-1.96)(+0.95) (syst.pol.) mu b. The differential cross sections, in transverse momentum and rapidity, of the J/psi were also measured. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved.

引用

页码：442 / 455

页数：14

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