Search for the B c + → χc1(3872)π+ decay

Abstract

A search for the decay B c + → χc1(3872)π+ is reported using proton-proton collision data collected with the LHCb detector between 2011 and 2018 at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of 9 fb−1. No significant signal is observed. Using the decay B c + → ψ(2S)π+ as a normalisation channel, an upper limit for the ratio of branching fractions R ψ 2 S χ c 1 3872 = B B c + → χ c 1 3872 π + B B c + → ψ 2 S π + × B χ c 1 3872 → J / ψ π + π − B ψ 2 S → J / ψ π + π − < 0.05 0.06 , is set at the 90 (95)% confidence level.