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 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.

Measurement of the B± meson nuclear modification factor in Pb-Pb collisions at sNN =5.02 TeV / Sirunyan, A.M., Tumasyan, A., Adam, W., Asilar, E., Bergauer, T., Brandstetter, J., Brondolin, E., Dragicevic, M., Erö, J., Flechl, M., Friedl, M., Frühwirth, R., Ghete, V.M., Hörmann, N., Hrubec, J., Jeitler, M., König, A., Krätschmer, I., Liko, D., Matsushita, T., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 119:15(2017). [10.1103/PhysRevLett.119.152301]

Measurement of the B± meson nuclear modification factor in Pb-Pb collisions at sNN =5.02 TeV

Barone, L.;Cipriani, M.;Del Re, D.;Longo, E.;Marzocchi, B.;Organtini, G.;Paramatti, R.;Rahatlou, S.;Santanastasio, F.;
2017

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 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.
2017
Physics and Astronomy (all); mesons; Pb-Pb collisions
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of the B± meson nuclear modification factor in Pb-Pb collisions at sNN =5.02 TeV / Sirunyan, A.M., Tumasyan, A., Adam, W., Asilar, E., Bergauer, T., Brandstetter, J., Brondolin, E., Dragicevic, M., Erö, J., Flechl, M., Friedl, M., Frühwirth, R., Ghete, V.M., Hörmann, N., Hrubec, J., Jeitler, M., König, A., Krätschmer, I., Liko, D., Matsushita, T., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 119:15(2017). [10.1103/PhysRevLett.119.152301]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1096064
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