We measure the mean lifetime τ=2/(ΓL+ΓH) and the decay-width difference ΔΓ=ΓL-ΓH of the light and heavy mass eigenstates of the Bs0 meson, BsL0 and BsH0, in Bs0→J/ψ decays using 1.7fb-1 of data collected with the CDF II detector at the Fermilab Tevatron pp̄ collider. Assuming CP conservation, a good approximation for the Bs0 system in the standard model, we obtain ΔΓ=0.076-0.063+0. 059(stat)±0.006(syst)ps-1 and τ=1.52±0.04(stat)±0. 02(syst)ps, the most precise measurements to date. Our constraints on the weak phase and ΔΓ are consistent with CP conservation

CDF Collaboration, T. Aaltonen, A. Abulencia, J. Adelman, T. Akimoto, M. G. Albrow, et al. (2008). Measurement of Lifetime and Decay-Width Difference in B0(s) --> J/psi phi Decays. PHYSICAL REVIEW LETTERS, 100(12), 1-7 [10.1103/PhysRevLett.100.121803].

Measurement of Lifetime and Decay-Width Difference in B0(s) --> J/psi phi Decays

CASTRO, ANDREA;DENINNO, MARIA MADDALENA;MOGGI, NICCOLO';MUSSINI, MANUEL;RIMONDI, FRANCO;ZUCCHELLI, STEFANO
2008

Abstract

We measure the mean lifetime τ=2/(ΓL+ΓH) and the decay-width difference ΔΓ=ΓL-ΓH of the light and heavy mass eigenstates of the Bs0 meson, BsL0 and BsH0, in Bs0→J/ψ decays using 1.7fb-1 of data collected with the CDF II detector at the Fermilab Tevatron pp̄ collider. Assuming CP conservation, a good approximation for the Bs0 system in the standard model, we obtain ΔΓ=0.076-0.063+0. 059(stat)±0.006(syst)ps-1 and τ=1.52±0.04(stat)±0. 02(syst)ps, the most precise measurements to date. Our constraints on the weak phase and ΔΓ are consistent with CP conservation
2008
CDF Collaboration, T. Aaltonen, A. Abulencia, J. Adelman, T. Akimoto, M. G. Albrow, et al. (2008). Measurement of Lifetime and Decay-Width Difference in B0(s) --> J/psi phi Decays. PHYSICAL REVIEW LETTERS, 100(12), 1-7 [10.1103/PhysRevLett.100.121803].
CDF Collaboration; T. Aaltonen; A. Abulencia; J. Adelman; T. Akimoto; M. G. Albrow; B. Álvarez González; S. Amerio; D. Amidei; A. Anastassov; A. Annov...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/71790
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