We present a study of Bs0 decays to the CP-odd final state J/ψf0(980) with J/ψ→μ+μ- and f0(980)→π+π-. Using pp̅ collision data with an integrated luminosity of 3.8  fb-1 collected by the CDF II detector at the Tevatron we measure a Bs0 lifetime of τ(Bs0→J/ψf0(980))=1.70-0.11+0.12(stat)±0.03(syst)ps. This is the first measurement of the Bs0 lifetime in a decay to a CP eigenstate and corresponds in the standard model to the lifetime of the heavy Bs0 eigenstate. We also measure the product of branching fractions of Bs0→J/ψf0(980) and f0(980)→π+π- relative to the product of branching fractions of Bs0→J/ψϕ and ϕ→K+K- to be Rf0/ϕ=0.257±0.020(stat)±0.014(syst), which is the most precise determination of this quantity to date.

T. AALTONEN, B. ÁLVAREZ GONZÁLEZ, S. AMERIO, D. AMIDEI, A. ANASTASSOV, A. ANNOVI, et al. (2011). Measurement of Branching Ratio and B0(s) Lifetime in the Decay B)_s -> j/psi f_0(980) at CDF. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 84, 052012-1-052012-14 [10.1103/PhysRevD.84.052012].

Measurement of Branching Ratio and B0(s) Lifetime in the Decay B)_s -> j/psi f_0(980) at CDF

BRIGLIADORI, LUCA;CASTRO, ANDREA;DENINNO, MARIA MADDALENA;MAZZANTI, PAOLO;MOGGI, NICCOLO';MUSSINI, MANUEL;RIMONDI, FRANCO;ZUCCHELLI, STEFANO
2011

Abstract

We present a study of Bs0 decays to the CP-odd final state J/ψf0(980) with J/ψ→μ+μ- and f0(980)→π+π-. Using pp̅ collision data with an integrated luminosity of 3.8  fb-1 collected by the CDF II detector at the Tevatron we measure a Bs0 lifetime of τ(Bs0→J/ψf0(980))=1.70-0.11+0.12(stat)±0.03(syst)ps. This is the first measurement of the Bs0 lifetime in a decay to a CP eigenstate and corresponds in the standard model to the lifetime of the heavy Bs0 eigenstate. We also measure the product of branching fractions of Bs0→J/ψf0(980) and f0(980)→π+π- relative to the product of branching fractions of Bs0→J/ψϕ and ϕ→K+K- to be Rf0/ϕ=0.257±0.020(stat)±0.014(syst), which is the most precise determination of this quantity to date.
2011
T. AALTONEN, B. ÁLVAREZ GONZÁLEZ, S. AMERIO, D. AMIDEI, A. ANASTASSOV, A. ANNOVI, et al. (2011). Measurement of Branching Ratio and B0(s) Lifetime in the Decay B)_s -> j/psi f_0(980) at CDF. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 84, 052012-1-052012-14 [10.1103/PhysRevD.84.052012].
T. AALTONEN; B. ÁLVAREZ GONZÁLEZ; S. AMERIO; D. AMIDEI; A. ANASTASSOV; A. ANNOVI; J. ANTOS; G. APOLLINARI; J. APPEL; T. ARISAWA; A. ARTIKOV; J. ASAADI...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/119214
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