Compact Muon Solenoid
LHC, CERN
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| CMS-PAS-HIN-19-011 | ||
| Measurement of $\mathrm{B_s^0}$ and $\mathrm{B^+}$ meson yields in PbPb collisions at ${\sqrt {\smash [b]{s_{_{\mathrm {NN}}}}}} = $ 5.02 TeV | ||
| CMS Collaboration | ||
| June 2020 | ||
| Abstract: The $\mathrm{B_s^0}$ and $\mathrm{B^+}$ production cross sections are measured in PbPb collisions at a center-of-mass energy per nucleon pair of 5.02 TeV. The data sample, collected by the CMS detector at the LHC, corresponds to an integrated luminosity of 1.7 nb$^{-1}$. The mesons are reconstructed in the exclusive decay channels $\mathrm{B_s^0}\rightarrow{J}/\psi\,\phi(1020)$ and $\mathrm{B^+}\rightarrow{J}/\psi\,K^{+}$. The $\mathrm{B_s^0}$ meson is observed with a statistical significance in excess of 5 standard deviations for the first time in nucleus-nucleus collisions. The measurements are performed as a function of the transverse momentum of the B mesons, in the interval 7-50 GeV$/c$, and of the PbPb collision centrality. The ratio of production yields of $\mathrm{B_s^0}$ and $\mathrm{B^+}$ is also presented. | ||
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Links:
CDS record (PDF) ;
inSPIRE record ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, Submitted to PLB. The superseded preliminary plots can be found here. |
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Compact Muon Solenoid LHC, CERN |
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