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Measurement of branching ratio and B_{s}^{0} lifetime in the decay B_{s}^{0}→J/ψf_{0}(980) at CDF

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Aaltonen, T., Álvarez González, B., Amerio, S., Amidei, D., Anastassov, A., Annovi, A., Antos, J., Apollinari, G., Appel, J., Apresyan, A. et al.
(2011) Measurement of branching ratio and B_{s}^{0} lifetime in the decay B_{s}^{0}→J/ψf_{0}(980) at CDF. Physical Review D, Vol. 84 (No. 5). doi:10.1103/PhysRevD.84.052012

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Official URL: http://dx.doi.org/10.1103/PhysRevD.84.052012

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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.

Item Type: Journal Article
Divisions: Faculty of Science > Physics
Journal or Publication Title: Physical Review D
Publisher: American Physical Society
ISSN: 1550-7998
Official Date: 2011
Dates:
DateEvent
2011UNSPECIFIED
Volume: Vol. 84
Number: No. 5
DOI: 10.1103/PhysRevD.84.052012
Status: Peer Reviewed
Publication Status: Published

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