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Next-to-Leading Order QCD corrections to the Lifetime Difference of $B_s$ Mesons

Alexander Lenz
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Abstract

In this talk we present a calculation of the dacay rate difference in the neutral $B_s-\bar{B}_s$ system, $ΔΓ_{B_s}$, in next-to-leading order (NLO) QCD. We find a sizeable decrease compared to leading-order (LO) estimates: $ (ΔΓ/Γ)_{B_s} = (f_{B_s}/210 MeV)^2 [0.006 B(m_b) + 0.150 B_S(m_b) - 0.0063]$ in terms of the bag parameters $B$ and $B_S$ in the NDR scheme. We put special emphasize on the theoretical and physical implications of this quantity.

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Alexander Lenz. 1999-06-10. Next-to-Leading Order QCD corrections to the Lifetime Difference of $B_s$ Mesons. https://arxiv.org/abs/hep-ph/9906317

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