Analysis ofB(B¯→Xsγ)at Next-to-Next-to-Leading Order with a Cut on Photon Energy

2006/10/05 by Thomas Becher, Matthias Neubert · 5 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1103/physrevlett.98.022003

published as Phys.Rev.Lett.98:022003,2007 · 4 pages, 1 figure

arxiv created 2006/10/05 · openalex publication_date 2007/01/12 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

By combining a recent estimate of the total B\ensuremath→X_s\ensuremathγ branching fraction at O(\ensuremathα_s²) with a detailed analysis of the effects of a cut E_\ensuremathγ\ensuremath≥1.6 GeV on photon energy, a prediction for the partial B\ensuremath→X_s\ensuremathγ branching fraction at next-to-next-to-leading order in renormalization-group improved perturbation theory is obtained, in which contributions from all relevant scales are factorized. The result B(B\ensuremath→X_s\ensuremathγ)=(2.98\ifmmode±\else\textpm\fi0.26)\ifmmode×\else\texttimes\fi10^\ensuremath-4 is about 1.4\ensuremathσ lower than the experimental world average. This opens a window for significant new physics contributions in rare radiative B decays.

Citations

• Fermionic next-to-next-to leading logarithmic corrections tob→sγ
• Threshold Resummation in Momentum Space from Effective Field Theory

Cited by

• Bound on minimal universal extra dimensions fromB¯→Xsγ
• Fitting the phenomenological MSSM
• Collider aspects of flavor physics at high Q
• B→Vγbeyond QCD factorization
• Measurements of [script B]([overline B]⁰ → Λ_c⁺[overline p]) and [script B](B^- → Λ_c⁺[overline p]π^-) and studies of Λ_c⁺π^- resonances