Towards a next-to-leading logarithmic result in $B \to X_s \gamma$

Christoph Greub; Tobias Hurth

Towards a next-to-leading logarithmic result in $B \to X_s \gamma$

High Energy Physics - Phenomenology 2007-05-23 v1

Authors: Christoph Greub , Tobias Hurth

Abstract

The calculation of the $O(\a_s)$ virtual corrections to the matrix element of the inclusive decay $b \to s \gamma$ is reported. These contributions drastically reduce the large renormalization scale dependence of the leading logarithmic calculation. Combining these results with the preliminary result for the Wilson coefficient $C_7(m_b)$ calculated recently by Chetyrkin, Misiak, and M\"unz, we estimate the branching ratio to be $BR(B \to X_s \gamma)=(3.25 \pm 0.50) \times 10^{-4}$ .

Keywords

$B \to X_s \gamma$ $O(\a_s)$ corrections branching ratio $C_7(m_b)$ renormalization scale

Cite

@article{arxiv.hep-ph/9608449,
  title  = {Towards a next-to-leading logarithmic result in $B \to X_s \gamma$},
  author = {Christoph Greub and Tobias Hurth},
  journal= {arXiv preprint arXiv:hep-ph/9608449},
  year   = {2007}
}

Comments

5 pages, 1 figure included, uses sprocl.sty and psfig.sty. Submitted for the DPF96 proceedings

Towards a next-to-leading logarithmic result in $B \to X_s \gamma$

Abstract

Keywords

Cite

Comments

Related papers