Centrality, rapidity and transverse momentum dependence of J/ψ suppression in Pb-Pb collisions at √sNN= 2.76TeV

ALICE Collaboration

doi:10.1016/j.physletb.2014.05.064

Centrality, rapidity and transverse momentum dependence of J/ψ suppression in Pb-Pb collisions at √s_NN= 2.76TeV

ALICE Collaboration

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

The inclusive J/ψ nuclear modification factor (_RAA) in Pb-Pb collisions at √s_NN=2.76TeV has been measured by ALICE as a function of centrality in the ^{e +e -} decay channel at mid-rapidity (|y| < 0.8) and as a function of centrality, transverse momentum and rapidity in the ^{μ +μ -} decay channel at forward-rapidity (2.5 < y < 4). The J/ψ yields measured in Pb-Pb are suppressed compared to those in pp collisions scaled by the number of binary collisions. The _RAA integrated over a centrality range corresponding to 90% of the inelastic Pb-Pb cross section is 0.72 ± 0.06(stat.) ± 0.10(syst.) at mid-rapidity and 0.58 ± 0.01(stat.) ± 0.09(syst.) at forward-rapidity. At low transverse momentum, significantly larger values of _RAA are measured at forward-rapidity compared to measurements at lower energy. These features suggest that a contribution to the J/ψ yield originates from charm quark (re)combination in the deconfined partonic medium.

Original language	English
Pages (from-to)	314-327
Number of pages	14
Journal	Physics Letters B
Volume	734
DOIs	https://doi.org/10.1016/j.physletb.2014.05.064
Publication status	Published - 27 Jun 2014

Keywords

Experimental results
J/ψ suppression
Quark gluon plasma
Quarkonium
Relativistic heavy ion collisions

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10.1016/j.physletb.2014.05.064

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@article{0f84c1475eb1433b9816be78fceaa121,

title = "Centrality, rapidity and transverse momentum dependence of J/ψ suppression in Pb-Pb collisions at √sNN= 2.76TeV",

abstract = "The inclusive J/ψ nuclear modification factor (RAA) in Pb-Pb collisions at √sNN=2.76TeV has been measured by ALICE as a function of centrality in the e +e - decay channel at mid-rapidity (|y| < 0.8) and as a function of centrality, transverse momentum and rapidity in the μ +μ - decay channel at forward-rapidity (2.5 < y < 4). The J/ψ yields measured in Pb-Pb are suppressed compared to those in pp collisions scaled by the number of binary collisions. The RAA integrated over a centrality range corresponding to 90% of the inelastic Pb-Pb cross section is 0.72 ± 0.06(stat.) ± 0.10(syst.) at mid-rapidity and 0.58 ± 0.01(stat.) ± 0.09(syst.) at forward-rapidity. At low transverse momentum, significantly larger values of RAA are measured at forward-rapidity compared to measurements at lower energy. These features suggest that a contribution to the J/ψ yield originates from charm quark (re)combination in the deconfined partonic medium.",

keywords = "Experimental results, J/ψ suppression, Quark gluon plasma, Quarkonium, Relativistic heavy ion collisions",

author = "B. Abelev and J. Adam and D. Adamov{\'a} and Aggarwal, {M. M.} and {Aglieri Rinella}, G. and M. Agnello and Agocs, {A. G.} and A. Agostinelli and N. Agrawal and Z. Ahammed and N. Ahmad and {Ahmad Masoodi}, A. and I. Ahmed and Ahn, {S. U.} and S. Basu and Bertens, {R. A.} and C. Bianchin and S. Bjelogrlic and M. Botje and A. Caliva and M. Chojnacki and P. Christakoglou and T. Chujo and {de Rooij}, R. and A. Dobrin and A. Dubla and A. Grelli and M. Krzewicki and Kuijer, {P. G.} and {La Pointe}, {S. L.} and E. Leogrande and Lodato, {D. F.} and J. Luo and A. Mischke and S. Muhuri and G. Nooren and {Oliveira Da Silva}, {A. C.} and T. Peitzmann and N. Poljak and M. Reicher and E. Rocco and {Rodriguez Manso}, A. and Snellings, {R. J M} and D. Thomas and {van Leeuwen}, M. and M. Veldhoen and M. Verweij and H. Yang and F. Zhou and Y. Zhou and {ALICE Collaboration}",

year = "2014",

month = jun,

day = "27",

doi = "10.1016/j.physletb.2014.05.064",

language = "English",

volume = "734",

pages = "314--327",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

}

TY - JOUR

T1 - Centrality, rapidity and transverse momentum dependence of J/ψ suppression in Pb-Pb collisions at √sNN= 2.76TeV

AU - Abelev, B.

AU - Adam, J.

AU - Adamová, D.

AU - Aggarwal, M. M.

AU - Aglieri Rinella, G.

AU - Agnello, M.

AU - Agocs, A. G.

AU - Agostinelli, A.

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahmad, N.

AU - Ahmad Masoodi, A.

AU - Ahmed, I.

AU - Ahn, S. U.

AU - Basu, S.

AU - Bertens, R. A.

AU - Bianchin, C.

AU - Bjelogrlic, S.

AU - Botje, M.

AU - Caliva, A.

AU - Chojnacki, M.

AU - Christakoglou, P.

AU - Chujo, T.

AU - de Rooij, R.

AU - Dobrin, A.

AU - Dubla, A.

AU - Grelli, A.

AU - Krzewicki, M.

AU - Kuijer, P. G.

AU - La Pointe, S. L.

AU - Leogrande, E.

AU - Lodato, D. F.

AU - Luo, J.

AU - Mischke, A.

AU - Muhuri, S.

AU - Nooren, G.

AU - Oliveira Da Silva, A. C.

AU - Peitzmann, T.

AU - Poljak, N.

AU - Reicher, M.

AU - Rocco, E.

AU - Rodriguez Manso, A.

AU - Snellings, R. J M

AU - Thomas, D.

AU - van Leeuwen, M.

AU - Veldhoen, M.

AU - Verweij, M.

AU - Yang, H.

AU - Zhou, F.

AU - Zhou, Y.

AU - ALICE Collaboration

PY - 2014/6/27

Y1 - 2014/6/27

N2 - The inclusive J/ψ nuclear modification factor (RAA) in Pb-Pb collisions at √sNN=2.76TeV has been measured by ALICE as a function of centrality in the e +e - decay channel at mid-rapidity (|y| < 0.8) and as a function of centrality, transverse momentum and rapidity in the μ +μ - decay channel at forward-rapidity (2.5 < y < 4). The J/ψ yields measured in Pb-Pb are suppressed compared to those in pp collisions scaled by the number of binary collisions. The RAA integrated over a centrality range corresponding to 90% of the inelastic Pb-Pb cross section is 0.72 ± 0.06(stat.) ± 0.10(syst.) at mid-rapidity and 0.58 ± 0.01(stat.) ± 0.09(syst.) at forward-rapidity. At low transverse momentum, significantly larger values of RAA are measured at forward-rapidity compared to measurements at lower energy. These features suggest that a contribution to the J/ψ yield originates from charm quark (re)combination in the deconfined partonic medium.

AB - The inclusive J/ψ nuclear modification factor (RAA) in Pb-Pb collisions at √sNN=2.76TeV has been measured by ALICE as a function of centrality in the e +e - decay channel at mid-rapidity (|y| < 0.8) and as a function of centrality, transverse momentum and rapidity in the μ +μ - decay channel at forward-rapidity (2.5 < y < 4). The J/ψ yields measured in Pb-Pb are suppressed compared to those in pp collisions scaled by the number of binary collisions. The RAA integrated over a centrality range corresponding to 90% of the inelastic Pb-Pb cross section is 0.72 ± 0.06(stat.) ± 0.10(syst.) at mid-rapidity and 0.58 ± 0.01(stat.) ± 0.09(syst.) at forward-rapidity. At low transverse momentum, significantly larger values of RAA are measured at forward-rapidity compared to measurements at lower energy. These features suggest that a contribution to the J/ψ yield originates from charm quark (re)combination in the deconfined partonic medium.

KW - Experimental results

KW - J/ψ suppression

KW - Quark gluon plasma

KW - Quarkonium

KW - Relativistic heavy ion collisions

UR - http://www.scopus.com/inward/record.url?scp=84902007555&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2014.05.064

DO - 10.1016/j.physletb.2014.05.064

M3 - Article

AN - SCOPUS:84902007555

SN - 0370-2693

VL - 734

SP - 314

EP - 327

JO - Physics Letters B

JF - Physics Letters B

ER -

Centrality, rapidity and transverse momentum dependence of J/ψ suppression in Pb-Pb collisions at √s_NN= 2.76TeV

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Keywords

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