Measurement of branching ratio and Bs0 lifetime in the decay Bs0→J/ψf0(980) at CDF Academic Article uri icon


  • We present a study of Bs0 decays to the CP-odd final state J/ψf 0(980) with J/ψ→μ+μ- and f 0(980)→π+π-. Using pp̄ collision data with an integrated luminosity of 3.8fb-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/ψ and →K+K- to be Rf0 /=0.257±0.020(stat)±0.014(syst), which is the most precise determination of this quantity to date. © 2011 American Physical Society.

altmetric score

  • 5.768

author list (cited authors)

  • Aaltonen, T., González, B., Amerio, S., Amidei, D., Anastassov, A., Annovi, A., ... Zucchelli, S.

citation count

  • 51

publication date

  • September 2011