Quarkonia suppression in PbPb collisions at sNN=2.76 TeV

Kumar, Vineet; Shukla, Prashant; Vogt, Ramona

doi:10.1103/PhysRevC.92.024908

Title: Quarkonia suppression in PbPb collisions at $\sqrt{s_{N N}} = 2.76$ TeV

Journal Article · Fri Aug 14 00:00:00 EDT 2015 · Physical Review C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.92.024908· OSTI ID:1399757

Kumar, Vineet ^[1]; Shukla, Prashant ^[1]; Vogt, Ramona ^[2]

Bhabha Atomic Research Center, Mumbai (India); Homi Bhabha National Institute, Mumbai (India)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Univ. of California, Davis, CA (United States)

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/ψ and Υ in different kinematic regions has been demonstrated for PbPb collisions at √^sNN = 2.76 TeV in comparison with the measurements. Both the suppression and regeneration due to a deconfined medium strongly affect the low and intermediate pT range. As a result, the large observed suppression of J/ψ at p_T > 10GeV/c exceeds the estimates of suppression by gluon dissociation.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1399757

Alternate ID(s):: OSTI ID: 1210113

Report Number(s):: LLNL-JRNL-737145; PRVCAN; TRN: US1702852

Journal Information:: Physical Review C, Nuclear Physics, Vol. 92, Issue 2; ISSN 0556-2813

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 13 works

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