Measurement of $f_s/f_u$ variation with proton-proton collision energy and $B$-meson kinematics

LHCb collaboration, R. Aaij, C. Abellán Beteta +903

The ratio of the ${\mathrm{B}}_{\mathrm{s}}^0$ and ${\mathrm{B}}^{+}$ fragmentation fractions $f_{\mathrm{s}}$ and $f_u$ is studied with $B_{\mathrm{s}}^0\to \mathrm{J}/\psi \varphi$ and $B^+\to\mathrm{J…