Bs0 Physics at Cdf

Physics

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Scientific paper

We present new measurements on the Bs0 system from the CDF experiment obtained with more than 1.0 fb-1 of data. Using the Bs0 -> J/ψ \varphi decay mode, we measure an average lifetime τ and decay width difference ΔΓ of BsL and BsH eigen-states. Applying flavor tagging to that decay, we also obtain bounds on the CP phase βs, analogous to the angle β in the B0 system. Additional sensitivity to βs is obtained through the measurement of the semileptonic decay asymmetry ASLs We also use fully and partially reconstructed Bs0 -> Ds π decays to obtain a new precise measurement of the average Bs0 lifetime.

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