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Measurement of branching ratio and B[subscript s][superscript 0] lifetime in the decay B[subscript s][superscript 0]→J/ψf0(980) at CDF

Author(s)
Bauer, Gerry P.; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Makhoul, K.; Paus, Christoph M. E.
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Alternative title
Measurement of branching ratio and Bs0 lifetime in the decay Bs0→J/ψf0(980) at CDF
Terms of use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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Abstract
We present a study of B[subscript s][superscript 0] decays to the CP-odd final state J/ψf[subscript 0](980) with J/ψ→μ+μ- and f0(980)→π[superscript +]π[superscript -]. Using pp̅ collision data with an integrated luminosity of 3.8  fb[superscript -1] collected by the CDF II detector at the Tevatron we measure a B[subscript s][superscript 0] lifetime of τ(B[subscript s][superscript 0]→J/ψf[subscript 0](980))=1.70[subscript -0.11][superscript +0.12](stat)±0.03(syst)ps. This is the first measurement of the B[subscript s][superscript 0] lifetime in a decay to a CP eigenstate and corresponds in the standard model to the lifetime of the heavy B[subscript s][superscript 0] eigenstate. We also measure the product of branching fractions of B[subscript s][superscript 0]→J/ψf[subscript 0](980) and f0(980)→π[superscript +]π[superscript -] relative to the product of branching fractions of B[subscript s][superscript 0]→J/ψϕ and ϕ→K[superscript +]K[superscript -] to be R[subscript f0/ϕ]=0.257±0.020(stat)±0.014(syst), which is the most precise determination of this quantity to date.
Date issued
2011-09
URI
http://hdl.handle.net/1721.1/69191
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review D
Publisher
American Physical Society (APS)
Citation
Aaltonen, T. et al. “Measurement of Branching Ratio and B_{s}^{0} Lifetime in the Decay B_{s}^{0}→J/ψf_{0}(980) at CDF.” Physical Review D 84.5 (2011): n. pag. Web. 24 Feb. 2012. © 2011 American Physical Society
Version: Final published version
ISSN
1550-7998
1089-4918

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