Quarkonia suppression in PbPb collisions at √sNN=2.76 TeV

被引：14

作者：

Kumar, Vineet ^{[1
,2
]}

Shukla, Prashant ^{[1
,2
]}

Vogt, Ramona ^{[3
,4
]}

机构：

[1] Bhabha Atom Res Ctr, Div Nucl Phys, Bombay 400085, Maharashtra, India

[2] Homi Bhabha Natl Inst, Bombay, Maharashtra, India

[3] Lawrence Livermore Natl Lab, Nucl & Chem Sci Div, Livermore, CA 94551 USA

[4] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

来源：

PHYSICAL REVIEW C | 2015年 / 92卷 / 02期

关键词：

J/PSI SUPPRESSION; GLUON PLASMA; HEAVY; DEPENDENCE; CENTRALITY; RAPIDITY; STATES; CHARM;

D O I：

10.1103/PhysRevC.92.024908

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We estimate the modification of quarkonia yields due to different processes in the medium produced in PbPb collisions at LHC energy. The quarkonia and heavy flavor cross sections calculated up to next-to-leading order (NLO) are used in the study. Shadowing corrections are obtained with the NLO EPS09 parametrization. A kinetic model is employed which incorporates quarkonia suppression inside a QGP, suppression due to hadronic comovers, and regeneration from charm pairs. The quarkonia dissociation cross section due to gluon collisions has been considered and the regeneration rate has been obtained using the principle of detailed balance. The modification in quarkonia yields due to collisions with hadronic comovers has been estimated assuming that the comovers are pions. The manifestations of these effects on the nuclear modification factors for both J/psi and Upsilon in different kinematic regions has been demonstrated for PbPb collisions at root s(NN) = 2.76 TeV in comparison with the measurements. Both the suppression and regeneration due to a deconfined medium strongly affect the low and intermediate p(T) range. The large observed suppression of J/psi at p(T) > 10 GeV/c exceeds the estimates of suppression by gluon dissociation.

引用

页数：9

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