We present a study of B-s(0) decays to the CP-odd final state J/psi f(0)(980) with J/psi -> mu(+)mu(-) and f(0)(980) -> pi(+)pi(-). Using p(p) over bar $ collision data with an integrated luminosity of 3.8 fb(-1) collected by the CDF II detector at the Tevatron we measure a B-s(0) lifetime of tau(B-s(0) -> J/psi f(0)(980)) = 1.70(-0.11)(+0.12)(stat) +/- 0.03(syst)ps. This is the first measurement of the B-s(0) lifetime in a decay to a CP eigenstate and corresponds in the standard model to the lifetime of the heavy B-s(0) eigenstate. We also measure the product of branching fractions of B-s(0) -> J/psi f(0)(980) and f(0)(980) -> pi(+)pi(-) relative to the product of branching fractions of B-s(0) -> J/psi phi and phi -> K+K- to be R-f0/phi = 0.257 +/- 0: 020(stat) +/- 0.014(syst), which is the most precise determination of this quantity to date.

Measurement of branching ratio and B-s(0) lifetime in the decay B-s(0) -> J/psi f(0)(980) at CDF / T., A., B. A., G., S., A., D., A., A., A., A., A., J., A., G., A., J. A., A., A., A., T., A., A., A., J., A., W., A., B., A., A., A., F., A., W., B., A., B.G., V. E., B., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 84:(2011), p. 052012. [10.1103/physrevd.84.052012]

Measurement of branching ratio and B-s(0) lifetime in the decay B-s(0) -> J/psi f(0)(980) at CDF

S. D. Cecco;GIAGU, Stefano;IORI, Maurizio;MARGAROLI, Fabrizio;
2011

Abstract

We present a study of B-s(0) decays to the CP-odd final state J/psi f(0)(980) with J/psi -> mu(+)mu(-) and f(0)(980) -> pi(+)pi(-). Using p(p) over bar $ collision data with an integrated luminosity of 3.8 fb(-1) collected by the CDF II detector at the Tevatron we measure a B-s(0) lifetime of tau(B-s(0) -> J/psi f(0)(980)) = 1.70(-0.11)(+0.12)(stat) +/- 0.03(syst)ps. This is the first measurement of the B-s(0) lifetime in a decay to a CP eigenstate and corresponds in the standard model to the lifetime of the heavy B-s(0) eigenstate. We also measure the product of branching fractions of B-s(0) -> J/psi f(0)(980) and f(0)(980) -> pi(+)pi(-) relative to the product of branching fractions of B-s(0) -> J/psi phi and phi -> K+K- to be R-f0/phi = 0.257 +/- 0: 020(stat) +/- 0.014(syst), which is the most precise determination of this quantity to date.
2011
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of branching ratio and B-s(0) lifetime in the decay B-s(0) -> J/psi f(0)(980) at CDF / T., A., B. A., G., S., A., D., A., A., A., A., A., J., A., G., A., J. A., A., A., A., T., A., A., A., J., A., W., A., B., A., A., A., F., A., W., B., A., B.G., V. E., B., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 84:(2011), p. 052012. [10.1103/physrevd.84.052012]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/491956
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