Measurement of the ratio of branching fractions mathcal{B}left({B}_c^{+}to {B}_s^0{pi}^{+}right)/mathcal{B}left({B}_c^{+}to J/psi {pi}^{+}right)

Abstract

The ratio of branching fractions of {B}_c^{+}to {B}_s^0{pi}^{+} and {B}_c^{+}to J/psi {pi}^{+} decays is measured with proton-proton collision data of a centre-of-mass energy of 13 TeV. The data were collected with the LHCb experiment during 2016–2018, corresponding to an integrated luminosity of 5.4 fb−1. The {B}_s^0 mesons are reconstructed via the decays {B}_s^0to J/psi phi and {B}_s^0to {D}_s^{-}{pi}^{+} . The ratio of branching fractions is measured to be mathcal{B}left({B}_c^{+}to {B}_s^0{pi}^{+}right)/mathcal{B}left({B}_c^{+}to J/psi {pi}^{+}right)=91pm 10pm 8pm 3 where the first uncertainty is statistical, the second is systematic and the third is due to the knowledge of the branching fractions of the intermediate state decays.