Effect of heavy-quark energy loss on the muon differential production cross section in Pb-Pb collisions at √SNN=5.5 TeV

被引：10

作者：

del Valle, Z. Conesa ^{[1
]}

Dainese, A. ^{[2
]}

Ding, H. -T. ^{[3
]}

Garcia, G. Martinez ^{[1
]}

Zhou, D. C. ^{[3
]}

机构：

[1] Univ Nantes, Ecole Mines, Subatech CNRS IN2P3, Nantes, France

[2] Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Padua, Italy

[3] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China

来源：

PHYSICS LETTERS B | 2008年 / 663卷 / 03期

基金：

中国国家自然科学基金;

关键词：

quark-gluon plasma; relativistic heavy-ion collisions; heavy quarks; weak gauge bosons; muons;

D O I：

10.1016/j.physletb.2008.03.073

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the nuclear modification factors R-AA and R-CP of the high transverse momentum (5 < p(t) < 60 GeV/c) distribution of muons in Pb-Pb collisions at LHC energies. We consider two pseudo-rapidity ranges covered by the LHC experiments: |eta| < 2.5 and 2.5 < eta < 4. Muons from semi-leptonic decays of heavy quarks (c and b) and from leptonic decays of weak gauge bosons (W and Z) are the main contributions to the muon p(t) distribution above a few GeV/c. We compute the heavy quark contributions using available pQCD-based programs. We include the nuclear shadowing modification of the parton distribution functions and the in-medium radiative energy loss for heavy quarks, using the mass-dependent BDMPS quenching weights. Muons from W and Z leptonic decays, that dominate the yield at high p(t), can be used as a medium-blind reference to observe the medium-induced suppression of beauty quarks. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：202 / 208

页数：7

共 40 条

[1] Transverse momentum and centrality dependence of High-pT nonphotonic electron suppression in Au plus Au collisions at √SNN=200 GeV [J].

Abelev, B. I. ;

Aggarwal, M. M. ;

Ahammed, Z. ;

Anderson, B. D. ;

Arkhipkin, D. ;

Averichev, G. S. ;

Bai, Y. ;

Balewski, J. ;

Barannikova, O. ;

Barnby, L. S. ;

Baudot, J. ;

Baumgart, S. ;

Belaga, V. V. ;

Bellingeri-Laurikainen, A. ;

Bellwied, R. ;

Benedosso, F. ;

Betts, R. R. ;

Bhardwaj, S. ;

Bhasin, A. ;

Bhati, A. K. ;

Bichsel, H. ;

Bielcik, J. ;

Bielcikova, J. ;

Bland, L. C. ;

Blyth, S-L. ;

Bombara, M. ;

Bonner, B. E. ;

Botje, M. ;

Bouchet, J. ;

Brandin, A. V. ;

Bravar, A. ;

Burton, T. P. ;

Bystersky, M. ;

Cadman, R. V. ;

Cai, X. Z. ;

Caines, H. ;

de la Barca Sanchez, M. Calderon ;

Callner, J. ;

Catu, O. ;

Cebra, D. ;

Chajecki, Z. ;

Chaloupka, P. ;

Chattopadhyay, S. ;

Chen, H. F. ;

Chen, J. H. ;

Chen, J. Y. ;

Cheng, J. ;

Cherney, M. ;

Chikanian, A. ;

Christie, W. .

PHYSICAL REVIEW LETTERS, 2007, 98 (19)

[2]

ABREU S, ARXIV07110974

[3] Collisional dissociation of heavy mesons in dense QCD matter [J].

Adil, Azfar ;

Vitev, Ivan .

PHYSICS LETTERS B, 2007, 649 (2-3) :139-146

[4]

Adler, 2006, PHYS REV LETT, V97

[5] ALICE:: Physics Performance Report, Volume II [J].

Alessandro, B. ;

Antinori, F. ;

Belikov, J. A. ;

Blume, C. ;

Dainese, A. ;

Foka, P. ;

Giubellino, P. ;

Hippolyte, B. ;

Kuhn, C. ;

Martinez, G. ;

Monteno, M. ;

Morsch, A. ;

Nayak, T. K. ;

Nystrand, J. ;

Noriega, M. Lopez ;

Paic, G. ;

Pluta, J. ;

Ramello, L. ;

Revol, J-P ;

Safarik, K. ;

Schukraft, J. ;

Schutz, Y. ;

Scomparin, E. ;

Snellings, R. ;

Baillie, O. Villalobos ;

Vercellin, E. ;

Cortese, P. ;

Dellacasa, G. ;

Ramello, L. ;

Sitta, M. ;

Ahmad, N. ;

Ahmad, S. ;

Ahmad, T. ;

Bari, W. ;

Irfan, M. ;

Zafar, M. ;

Botje, M. ;

Kuijer, P. G. ;

Snellings, R. ;

Belogianni, A. ;

Christakoglou, P. ;

Ganoti, P. ;

Petridis, A. ;

Roukoutakis, F. ;

Spyropoulou-Stassinaki, M. ;

Vassiliou, M. ;

Bruno, G. E. ;

Cali, I. A. ;

Caselle, M. ;

De Cataldo, G. .

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 2006, 32 (10) :1295-2040

[6] LEPTONIC DECAY OF HEAVY FLAVORS - A THEORETICAL UPDATE [J].

ALTARELLI, G ;

CABIBBO, N ;

CORBO, G ;

MAIANI, L ;

MARTINELLI, G .

NUCLEAR PHYSICS B, 1982, 208 (03) :365-380

[7] High-precision QCD at hadron colliders: Electroweak gauge boson rapidity distributions at next-to-next-to leading order [J].

Anastasiou, C ;

Dixon, L ;

Melnikov, K ;

Petriello, F .

PHYSICAL REVIEW D, 2004, 69 (09) :27

[8]

ANTINORI F, ALICEINT2006015

[9] Testing the color charge and mass dependence of parton energy loss with heavy-to-light ratios at BNL RHIC and CERN LHC [J].

Armesto, N ;

Dainese, A ;

Salgado, CA ;

Wiedemann, UA .

PHYSICAL REVIEW D, 2005, 71 (05) :1-10

[10] How sensitive are high-pT electron spectra at RHIC to heavy quark energy loss? [J].

Armesto, Nestor ;

Cacciari, Matteo ;

Dainese, Andrea ;

Salgado, Carlos A. ;

Wiedemann, Urs Achim .

PHYSICS LETTERS B, 2006, 637 (06) :342-346

← 1 2 3 4 →