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Measurement of Lifetime and Decay-Width Difference in Bs0 -> J/ψϕ Decays

CollaborationWith : Clark, Allan Geoffrey / Hamilton, Andrew / Lefevre, Régis / Sfyrla, Anna / Shreyber, Irina / Vallecorsa, Sofia / Wu, Xin
Published in Physical Review Letters. 2008, vol. 100, no. 12, p. 121803
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 B0s meson, B0sL and B0sH, in B0s→J/ψϕ decays using 1.7  fb−1 of data collected with the CDF II detector at the Fermilab Tevatron pp¯ collider. Assuming CP conservation, a good approximation for the B0s system in the standard model, we obtain ΔΓ=0.076+0.059−0.063(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.
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CDF COLLABORATION. Measurement of Lifetime and Decay-Width Difference in Bs0 -> J/ψϕ Decays. In: Physical Review Letters, 2008, vol. 100, n° 12, p. 121803. https://archive-ouverte.unige.ch/unige:38507

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Deposited on : 2014-07-07

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