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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/46203
Title: Measurement of branching ratio and Bs0 lifetime in the decay Bs0→J/ψf0(980) at CDF
Authors: Aaltonen, T.; Álvarez González, B.; Casal, Bruno; Cuevas, Javier; Gómez, G.; Palencia, Enrique; Rodrigo, Teresa; Ruiz Jimeno, Alberto; Scodellaro, Luca; Vila, Iván; Vilar, Rocío; Vizán, J.
Issue Date: Sep-2011
Publisher: American Physical Society
Citation: Physical Review D 84(5): 052012 (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.
Description: 14 páginas, 11 figuras, 2 tablas.-- CDF Collaboration: et al.
Publisher version (URL): http://dx.doi.org/10.1103/PhysRevD.84.052012
URI: http://hdl.handle.net/10261/46203
DOI: 10.1103/PhysRevD.84.052012
ISSN: 1550-7998
E-ISSN: 1550-2368
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