Measurement of the B$^+$ hadron production cross section in pp collisions at 13 TeV

The B$^+$ meson differential cross sections, as a function of transverse momentum and rapidity, are measured in pp collisions at center-of-mass energy $\sqrt{s} = 13$ TeV, on the basis of a data sample collected by the CMS experiment, corresponding to an integrated luminosity of 50.8 pb$^{-1}$. The measurement uses the exclusive decay channel $\mathrm{B}^+ \to \mathrm{J}/\psi~\mathrm{K}^+$, with the $\mathrm{J}/\psi$ decaying to a pair of muons. The results are compared with theory calculations and with measurements made at 7 TeV.