Abstract : The lifetime of the $B^{0}_{s}$ meson is measured in the decay channel $B^{0}_{s} \to J/\psi\mbox{ }\pi^+ \pi^-$ with $880 \leq M_{\pi^+\pi^-} \leq 1080$ MeV/$c^2$, which is mainly a CP-odd state and dominated by the $f_{0}(980)$ resonance. In 10.4 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 $\tau(B^{0}_{s}) = 1.70\pm 0.14 \mbox{ (stat)} \pm 0.05 \mbox{ (syst) ps}$. Neglecting CP violation in $B_s^0/\bar{B}_s^0$ mixing, the measurement can be translated into the width of the heavy mass eigenstate of the $B^0_s$, $\Gamma_H = 0.59 \pm 0.05 \mbox{ (stat)} \pm 0.02 \mbox{ (syst)} \mbox{ ps$^{-1}$}$.
http://hal.in2p3.fr/in2p3-01283982
Contributeur : Dominique Girod
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Soumis le : lundi 7 mars 2016 - 11:17:34
Dernière modification le : lundi 9 avril 2018 - 12:22:07
V.M. Abazov, F. Badaud, Ph. Gris, G. Grenier, T. Kurca, et al.. $B^{0}_{s}$ lifetime measurement in the CP-odd decay channel $B^{0}_{s} \to J/\psi\mbox{ }f_{0}(980)$. Physical Review D, American Physical Society, 2016, 96, pp.012001. 〈10.1103/PhysRevD.94.012001〉. 〈in2p3-01283982〉
