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Measurement of the B± Meson Nuclear Modification Factor in Pb-Pb Collisions at sNN =5.02 TeV

Abstract: The differential production cross sections of B± mesons are measured via the exclusive decay channels B±?J/?K±??+?-K± as a function of transverse momentum in pp and Pb-Pb collisions at a center-of-mass energy sNN=5.02 TeV per nucleon pair with the CMS detector at the LHC. The pp(Pb-Pb) data set used for this analysis corresponds to an integrated luminosity of 28.0 pb-1 (351 ?b-1). The measurement is performed in the B± meson transverse momentum range of 7 to 50 GeV/c, in the rapidity interval |y|<2.4. In this kinematic range, a strong suppression of the production cross section by about a factor of 2 is observed in the Pb-Pb system in comparison to the expectation from pp reference data. These results are found to be roughly compatible with theoretical calculations incorporating beauty quark diffusion and energy loss in a quark-gluon plasma.

 Fuente: Phys. Rev. Lett. Vol. 119, Iss. 15, Art. Num. 152301 (2017)

 Editorial: American Physical Society

 Fecha de publicación: 01/10/2017

 Nº de páginas: 17

 Tipo de publicación: Artículo de Revista

 DOI: 10.1103/PhysRevLett.119.152301

 ISSN: 0031-9007,1079-7114

 Url de la publicación: https://doi.org/10.1103/PhysRevLett.119.152301