A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is
Probing penguin coefficients with the lifetime ratio $\tau(B_s)/\tau(B_d)$
We calculate penguin contributions to the lifetime splitting between the Bs and the Bd meson. In the standard model the penguin effects are found to be opposite in sign, but of similar magnitude as the contributions of the current-current operators, despite the smallness of the penguin coefficients. We predict τ(Bs)/τ(Bd)−1=(−1.2±10.0)×10−3(fBs/190MeV)2, where the error stems from hadronic uncertainties. Since penguin coefficients are sensitive to new physics and poorly tested experimentally,doi:10.3204/pubdb-2017-09827 fatcat:rflbm67amzdntbl6zsngdvky5a