A Theoretical Prediction of the Bs-Meson Lifetime Difference
D. Becirevic, D. Meloni, A. Retico, V. Gimenez, V. Lubicz, G. Martinelli
Abstract
We present the results of a quenched lattice calculation of the operator matrix elements relevant for predicting the Bs width difference. Our main result is (ΔΓBs/ΓBs)= (4.7 +/- 1.5 +/- 1.6) 10(-2), obtained from the ratio of matrix elements, R(mb)=< Bs0|QS|Bs0>/< Bs0|QL|Bs0>=-0.93(3)(+0.00)(-0.01). R(mb) was evaluated from the two relevant B-parameters, BSMSbar(mb)=0.86(2)(+0.02)(-0.03) and BBsMSbar(mb) = 0.91(3)(+0.00)(-0.06), which we computed in our simulation.
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