Measurement of the $\mathrm{B}_{s}^{0}$ meson nuclear modification factor in PbPb collisions at $\sqrt{\smash[b]{s_{_{\mathrm{NN}}}}} = 5.02\,\mathrm{Te\hspace{-1pt}V}$

The production cross sections of $\mathrm{B}_{s}^{0}$ mesons and charge conjugates are measured in pp and PbPb collisions via the exclusive decay channel $\mathrm{B}_{s}^{0}\to\mathrm{J}\hspace{-1pt}/\hspace{-1pt}\psi\hspace{2pt}\phi\to\mu^{+}\mu^{-}\mathrm{K}^{+}\mathrm{K}^{-}$ at a center-of-mass energy $\sqrt{\smash[b]{s_{_{\mathrm{NN}}}}} = 5.02\,\mathrm{Te\hspace{-1pt}V}$ per nucleon pair and within the rapidity range ($|y|<2.4$) using the CMS detector at the LHC. The proton-proton (pp) measurement is performed as a function of transverse momentum of the $\mathrm{B}_{s}^{0}$ meson in the range of 7 to 50$\hspace{2pt}\mathrm{Ge\hspace{-1pt}V}\hspace{-2pt}/\hspace{-1pt}c$ and is compared to the predictions of next-to-leading order perturbative calculations. $\mathrm{B}_{s}^{0}$ production yield in PbPb collisions is measured in two $p_{\mathrm{T}}$ intervals, 7 to 15 and 15 to 50$\hspace{2pt}\mathrm{Ge\hspace{-1pt}V}\hspace{-2pt}/\hspace{-1pt}c$, and compared to the pp production yield in the same kinematic region. The nuclear modification factor, comparing $\mathrm{B}_{s}^{0}$ meson yields in PbPb and pp collisions, was extracted and a comparison with the $\mathrm{B}^{+}$ mesons was made. An indication of less suppression in production yield for $\mathrm{B}_{s}^{0}$ mesons than for $\mathrm{B}^{+}$ mesons in the PbPb system is seen but the difference is not significant within the current experimental uncertainties.