Measurement of Lifetime and Decay-Width Difference in B{sub s}{sup 0}{yields}J/{psi}{phi} Decays
- Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki (Finland)
- University of Illinois, Urbana, Illinois 61801 (United States)
We measure the mean lifetime {tau}=2/({gamma}{sub L}+{gamma}{sub H}) and the decay-width difference {delta}{gamma}={gamma}{sub L}-{gamma}{sub H} of the light and heavy mass eigenstates of the B{sub s}{sup 0} meson, B{sub sL}{sup 0} and B{sub sH}{sup 0}, in B{sub s}{sup 0}{yields}J/{psi}{phi} decays using 1.7 fb{sup -1} of data collected with the CDF II detector at the Fermilab Tevatron pp collider. Assuming CP conservation, a good approximation for the B{sub s}{sup 0} system in the standard model, we obtain {delta}{gamma}=0.076{sub -0.063}{sup +0.059}(stat){+-}0.006(syst) ps{sup -1} and {tau}=1.52{+-}0.04(stat){+-}0.02(syst) ps, the most precise measurements to date. Our constraints on the weak phase and {delta}{gamma} are consistent with CP conservation.
- OSTI ID:
- 21123780
- Journal Information:
- Physical Review Letters, Vol. 100, Issue 12; Other Information: DOI: 10.1103/PhysRevLett.100.121803; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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