We measure the mean lifetime tau=2/(Gamma(L)+Gamma(H)) and the decay-width difference Delta Gamma=Gamma(L)-Gamma(H) of the light and heavy mass eigenstates of the B-s(0) meson, B-sL(0) and B-sH(0), in B-s(0)-> J/psi phi decays using 1.7 fb(-1) of data collected with the CDF II detector at the Fermilab Tevatron p (p) over bar collider. Assuming CP conservation, a good approximation for the B-s(0) system in the standard model, we obtain Delta Gamma=(0.076(-0.063)(+0.059)(stat)+/- 0.006(syst)) ps(-1) and tau=(1.52 +/- 0.04(stat)+/- 0.02(syst)) ps, the most precise measurements to date. Our constraints on the weak phase and Delta Gamma are consistent with CP conservation.

T., A., A., A., J., A., T., A., M. G., A., B. A., G., et al. (2008). Measurement of lifetime and decay-width difference in B-s(0)-> J/psi phi decays. PHYSICAL REVIEW LETTERS, 100(12), 121803-1-121803-7 [10.1103/PhysRevLett.100.121803].

Measurement of lifetime and decay-width difference in B-s(0)-> J/psi phi decays

CIOCCI, MARIA AGNESE;
2008-01-01

Abstract

We measure the mean lifetime tau=2/(Gamma(L)+Gamma(H)) and the decay-width difference Delta Gamma=Gamma(L)-Gamma(H) of the light and heavy mass eigenstates of the B-s(0) meson, B-sL(0) and B-sH(0), in B-s(0)-> J/psi phi decays using 1.7 fb(-1) of data collected with the CDF II detector at the Fermilab Tevatron p (p) over bar collider. Assuming CP conservation, a good approximation for the B-s(0) system in the standard model, we obtain Delta Gamma=(0.076(-0.063)(+0.059)(stat)+/- 0.006(syst)) ps(-1) and tau=(1.52 +/- 0.04(stat)+/- 0.02(syst)) ps, the most precise measurements to date. Our constraints on the weak phase and Delta Gamma are consistent with CP conservation.
2008
T., A., A., A., J., A., T., A., M. G., A., B. A., G., et al. (2008). Measurement of lifetime and decay-width difference in B-s(0)-> J/psi phi decays. PHYSICAL REVIEW LETTERS, 100(12), 121803-1-121803-7 [10.1103/PhysRevLett.100.121803].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/37306
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