Determination of the HQET Parameters from the $B \to X_sγ$ Decay

Details Determination of the HQET Parameters from the $B \to X_sγ$ Decay Determination of the HQET Parameters from the $B \to X_sγ$ Decay

1996-08-21

arxiv.org/abs/hep-ph/9608389v2

Phys.Rev. D55 (1997) 2833-2836

Physics

High Energy Physics

High Energy Physics - Phenomenology

IR renormalon ambiguity is included

Scientific paper

10.1103/PhysRevD.55.2833

We combine the resummations for radiative corrections and for the heavy quark expansion to study the inclusive radiative decay $B \to X_s\gamma$. The infrared renormalon ambiguity is also taken into account. Including both theoretical and experimental uncertainties, we determine the allowed domain for the HQET parameters ${\bar \Lambda}$ and $\lambda_1$ centered at ${\bar \Lambda}=0.65$ GeV and $\lambda_1=-0.71$ GeV$^2$.

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