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Evidence of b-Jet Quenching in PbPb Collisions at sNN=2.76TeV

S. Chatrchyan et al. (CMS Collaboration)
Phys. Rev. Lett. 113, 132301 – Published 22 September 2014; Erratum Phys. Rev. Lett. 115, 029903 (2015)
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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 80250GeV/c, and within pseudorapidity |η|<2. The nuclear modification factor (RAA) 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 RAA 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.

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  • Received 15 December 2013

DOI:https://doi.org/10.1103/PhysRevLett.113.132301

This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

© 2014 CERN, for the CMS Collaboration

Erratum

Erratum: Evidence of b-Jet Quenching in PbPb Collisions at sNN=2.76TeV [Phys. Rev. Lett. 113, 132301 (2014)]

S. Chatrchyan et al. and CMS Collaboration
Phys. Rev. Lett. 115, 029903 (2015)

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The Stopping Power of Hot Nuclear Matter

Published 22 September 2014

LHC experiments show that the quark-gluon plasma stops jets made of light and heavy quarks equally well, offering insights into a state of matter thought to have existed in the early Universe.

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Vol. 113, Iss. 13 — 26 September 2014

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