Measurement of branching ratio and B[subscript s][superscript 0] lifetime in the decay B[subscript s][superscript 0]→J/ψf0(980) at CDF
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Aaltonen-2011-Measurement of branching ratio and.pdf
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Author(s)
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Paus, Christoph M. E.
Bauer, Gerry P
Makhoul, Khaldoun
Alternative Title
Measurement of branching ratio and Bs0 lifetime in the decay Bs0→J/ψf0(980) at CDF
Date Issued
September 2011
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
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.84.052012
