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.

(2017). Measurement of the B± Meson Nuclear Modification Factor in Pb-Pb Collisions at √sNN=5.02  TeV [journal article - articolo]. In PHYSICAL REVIEW LETTERS. Retrieved from http://hdl.handle.net/10446/140532

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

Re, V.;Vai, I.;
2017-01-01

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.
articolo
2017
Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Erö, J.; Flechl, M.; Friedl, M.; F...espandi
(2017). Measurement of the B± Meson Nuclear Modification Factor in Pb-Pb Collisions at √sNN=5.02  TeV [journal article - articolo]. In PHYSICAL REVIEW LETTERS. Retrieved from http://hdl.handle.net/10446/140532
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10446/140532
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