Speaker
Michel Hernandez Villanueva
(Cinvestav)
Description
The lifetime of the $B^0_s$ meson is measured in the decay channel $B^0_s\to J/\psi \pi^+\pi^-$ with $|M_{ \pi^+\pi^-} -980|<100\, $MeV, which is mainly CP-odd and dominated by the $f_0(980)$ resonance. Usnig $10.4\ \rm fb^{−1}$ of data collected with the D0 detector in Run II of the Tevatron, the lifetime of the $B^0_s$ meson is measured to be $\tau(B^0_s) = (1.696 \pm 0.141\, {\rm(stat)}\, \pm 0.049\, {\rm(syst)}) \,$ps. Neglecting CP violation in $B^0_s/\bar B^0_s$ mixing, the measurement can be translated into the width of the heavy mass eigenstate of the $B^0_s$, $\Gamma_H =( 0.590 \pm 0.049\,{\rm (stat)}\, \pm0.017 \, {\rm(syst)})\,\rm ps^{−1}$.
Primary authors
Bob.hirosky DZERO.PHYSICS.COORDINATOR
(DZero Experiment, Fermilab)
Boris.tuchming DZERO.PHYSICS.COORDINATOR
(DZero Experiment, Fermilab)
