# Measurement of the ${B}^{\pm}$ Meson Nuclear Modification Factor in Pb-Pb Collisions at $\sqrt{{s}_{NN}}=5.02\text{ }\text{ }\mathrm{TeV}$

Abstract : The differential production cross sections of B± mesons are measured via the exclusive decay channels B±→J/ψK±→μ+μ-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  μb-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.
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Article dans une revue
Physical Review Letters, American Physical Society, 2017, 119 (15), pp.152301. 〈10.1103/PhysRevLett.119.152301〉
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https://hal.archives-ouvertes.fr/hal-01669602
Contributeur : Inspire Hep <>
Soumis le : jeudi 13 décembre 2018 - 10:27:35
Dernière modification le : jeudi 13 décembre 2018 - 10:35:15

### Citation

Albert Sirunyan, Armen Tumasyan, Wolfgang Adam, Ece Asilar, Thomas Bergauer, et al.. Measurement of the ${B}^{\pm}$ Meson Nuclear Modification Factor in Pb-Pb Collisions at $\sqrt{{s}_{NN}}=5.02\text{ }\text{ }\mathrm{TeV}$. Physical Review Letters, American Physical Society, 2017, 119 (15), pp.152301. 〈10.1103/PhysRevLett.119.152301〉. 〈hal-01669602〉

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