Measuring the CP Violating Phase in Bs Mixing Using Bs -> J/ψ f_0(980)

Details Measuring the CP Violating Phase in Bs Mixing Using Bs -> J/ψ f_0(980) Measuring the CP Violating Phase in Bs Mixing Using Bs -> J/ψ f_0(980)

2009-09-29

arxiv.org/abs/0909.5442v2

Physics

High Energy Physics

High Energy Physics - Experiment

30 pages 22 figures

Scientific paper

We show that the decay Bs -> J/psi f0(980), f0(980)->pi+ pi- can be used to measure the CP violating phase in Bs mixing, -2\beta_s, and estimate the sensitivity as +/- 0.050 rad, for 2/fb of LHCb data. After adding in the related Bs -> J/psi eta', \eta' -> rho gamma mode, the sensitivity improves to +/- 0.044 rad. Use of these CP eigenstates obviates the need for a transversity analysis that must be used in the case of Bs -> J/psi phi decays.

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