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

Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Asilar, Ece and Bergauer, Thomas and Md. Ali, Mohd. Adli (2017) Measurement of the B± Meson Nuclear Modification Factor in Pb-Pb Collisions at sNN =5.02 TeV. Physical Review Letters, 119 (15). pp. 152301-1. ISSN 0031-9007 E-ISSN 1079-7114

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Abstract

The differential production cross sections of B� mesons are measured via the exclusive decay channels B� → J=ψK� → μþμ−K� as a function of transverse momentum in pp and Pb-Pb collisions at a centerof-mass energy ffiffiffiffiffiffiffiffi sNN p ¼ 5.02 TeV per nucleon pair with the CMS detector at the LHC. The ppðPb PbÞ data set used for this analysis corresponds to an integrated luminosity of 28.0 pb−1 (351 μb−1). The measurement is performed in the B� meson transverse momentum range of 7 to 50 GeV=c, in the rapidity interval jyj < 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.

Item Type:	Article (Journal)
Additional Information:	7861/63027
Uncontrolled Keywords:	Measurement of the B± Meson Nuclear; Modification Factor in Pb-Pb Collisions; sNN =5.02 TeV
Subjects:	Q Science > Q Science (General) Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science
Depositing User:	Engku Norulizati Engku Aziz
Date Deposited:	07 May 2018 16:33
Last Modified:	21 Jun 2018 11:00
URI:	http://irep.iium.edu.my/id/eprint/63027

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