A Theoretical Prediction of the Bs-Meson Lifetime Difference
نویسندگان
چکیده
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 (∆ΓBs/ΓBs) = (4.7 ± 1.5 ± 1.6) × 10−2, obtained from the ratio of matrix elements R(mb) = 〈B̄0 s |QS |B0 s 〉/〈B̄0 s |QL|B s 〉 = −0.93(3)+0.00 −0.01. R(mb) was evaluated from the two relevant B-parameters BMS S (mb) = 0.86(2) +0.02 −0.03 and B MS Bs (mb) = 0.91(3) −0.06 , which we computed in our simulation. PACS: 13.75Lb, 11.15.Ha, 12.38.Gc.
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