Evidence of b-jet quenching in PbPb collisions at sqrt(s[NN]) = 2.76 TeV - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physical Review Letters Year : 2014

Evidence of b-jet quenching in PbPb collisions at sqrt(s[NN]) = 2.76 TeV

S. Chatrchyan
  • Function : Author
P. Busson
R. Granier de Cassagnac
C. Mironov
P. Paganini
J.-L. Agram
C. Collard
E. Conte
P. van Hove
D. Contardo
M. Gouzevitch
M. Lethuillier
V. Sordini
P. Verdier

Abstract

The production of jets associated to bottom quarks is measured for the first time in PbPb collisions at a center-of-mass energy of 2.76 TeV per nucleon pair. Jet spectra are reported in the transverse momentum (pt) range of 80-250 GeV, and within pseudorapidity abs(eta < 2). The nuclear modification factor (R[AA]) calculated from these spectra shows a strong suppression in the b-jet yield in PbPb collisions relative to the yield observed in pp collisions at the same energy. The suppression persists to the largest values of pt studied, and is centrality dependent. The R[AA] is about 0.4 in the most central events, similar to previous observations for inclusive jets. This implies that jet quenching does not have a strong dependence on parton mass and flavor in the jet pt range studied.

Dates and versions

in2p3-00919539 , version 1 (17-12-2013)

Identifiers

Cite

S. Chatrchyan, S. Baffioni, F. Beaudette, P. Busson, C. Charlot, et al.. Evidence of b-jet quenching in PbPb collisions at sqrt(s[NN]) = 2.76 TeV. Physical Review Letters, 2014, 113, pp.132301. ⟨10.1103/PhysRevLett.113.132301⟩. ⟨in2p3-00919539⟩
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