Measurement of branching ratio and B0s lifetime in the decay B0s → J/ψ f0(980) at CDF

Aaltonen, T.

doi:10.1103/PhysRevD.84.052012

Title: Measurement of branching ratio and B⁰_s lifetime in the decay B⁰_s → J/ψ f₀(980) at CDF

Journal Article · Fri Sep 30 00:00:00 EDT 2011 · Physical Review. D, Particles, Fields, Gravitation and Cosmology

DOI:https://doi.org/10.1103/PhysRevD.84.052012· OSTI ID:1018743

Aaltonen, T. ^[1]

et al.

We present a study of Bs0 decays to the CP-odd final state J/ψ f₀(980) with J/ψ → µ⁺µ^- and f₀(980) → π⁺π^-. Using pp̄ 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(B⁰_s → J/ψ f₀(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 B⁰_s → J/ψ f₀(980) and f₀(980) → π⁺π^- relative to the product of branching fractions of B⁰_s → J/ψφ and φ→K⁺K^- to be R_{f_0/ψ} = 0.257 ± 0.020(stat) ± 0.014(syst), which is the most precise determination of this quantity to date.

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Research Organization:: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Contributing Organization:: CDF Collaboration

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 1018743

Report Number(s):: FERMILAB-PUB-11-279-E; arXiv eprint number arXiv:1106.3682; TRN: US1103451

Journal Information:: Physical Review. D, Particles, Fields, Gravitation and Cosmology, Vol. 84, Issue 5; ISSN 1550-7998

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 59 works

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Title: Measurement of branching ratio and B⁰_s lifetime in the decay B⁰_s → J/ψ f₀(980) at CDF