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

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/c, and within pseudorapidity |?|<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.

 Fuente: Phys. Rev. Lett. Vol. 113, Num. 13, Pag. 132301 (2014)

 Editorial: American Physical Society

 Fecha de publicación: 01/09/2014

 Nº de páginas: 16

 Tipo de publicación: Artículo de Revista

 DOI: 10.1103/PhysRevLett.113.132301

 ISSN: 0031-9007,1079-7114

 Proyecto español: FPA2014-55295-C3-1-R ; FPA 2011-28694-C02-01

 Url de la publicación: https://doi.org/10.1103/PhysRevLett.113.132301

Autoría

CHATRCHYAN, SERGUEI

JAVIER ANDRES BROCHERO CIFUENTES

MARCOS FERNANDEZ GARCIA

ALBERTO GRAZIANO

MARIA AMPARO LOPEZ VIRTO

RAFAEL JOSE MARCO DE LUCAS

FRANCISCA JAVIELA MUÑOZ SANCHEZ

ANA YAIZA RODRIGUEZ MARRERO