Measurement of the B± Meson Nuclear Modification Factor in Pb-Pb Collisions at sNN =5.02 TeV
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 t...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
American Physical Society
2017
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/63027/1/63027_Measurement%20of%20the%20B%C2%B1%20Meson%20Nuclear%20Modification%20Factor%20_article.pdf http://irep.iium.edu.my/63027/2/63027_Measurement%20of%20the%20B%C2%B1%20Meson%20Nuclear%20Modification%20Factor%20_scopus.pdf http://irep.iium.edu.my/63027/ https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.119.152301 |
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| Summary: | 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. |
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