Measurement of the $B_{s}^{0} ightarrow J/\psi \eta$ lifetime

Roel Aaij, Bernardo Adeva, Marco Adinolfi, Ziad Ajaltouni, Simon Akar, Johannes Albrecht, Federico Alessio, Michael Alexander, Suvayu Ali, Georgy Alkhazov, Paula Alvarez Cartelle, Antonio Augusto Alves Jr. (+746 others)
Measurement of the B 0 s → J /ψη lifetime .The LHCb Collaboration a r t i c l e i n f o a b s t r a c t Editor: M. Doser This paper is dedicated to the memory of our friend and colleague Ailsa Sparkes Using a data set corresponding to an integrated luminosity of 3 fb −1 , collected by the LHCb experiment in pp collisions at centre-of-mass energies of 7 and 8 TeV, the effective lifetime in the B 0 s → J /ψη decay mode, τ eff , is measured to be τ eff = 1.479 ± 0.034 (stat) ± 0.011 (syst) ps.
more » ... ming CP conservation, τ eff corresponds to the lifetime of the light B 0 s mass eigenstate. This is the first measurement of the effective lifetime in this decay mode.
doi:10.18154/rwth-2016-10961 fatcat:gmjicxz5zndatj7xi2n7w6dvkm