Journal
PHYSICAL REVIEW LETTERS
Volume 114, Issue 22, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.114.221801
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Funding
- Deutsche Forschungsgemeinschaft (DFG) [FOR 1873, Sonderforschungsbereich Transregio 9]
- State Committee of Science of Armenia [13-1c153]
- Volkswagen Stiftung Program [86426]
- Swiss National Science Foundation
- National Science Centre (Poland) research project [DEC-2014/13/B/ST2/03969]
- U.S. Department of Energy, Division of High Energy Physics [DE-AC02-06CH11357]
- U.S. National Science Foundation [PHY-1417354]
- MIUR [2010YJ2NYW 006]
- STFC [ST/L000474/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/L000474/1] Funding Source: researchfish
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Weak radiative decays of the B mesons belong to the most important flavor changing processes that provide constraints on physics at the TeV scale. In the derivation of such constraints, accurate standard model predictions for the inclusive branching ratios play a crucial role. In the current Letter we present an update of these predictions, incorporating all our results for the O(alpha(2)(s)) and lower-order perturbative corrections that have been calculated after 2006. New estimates of nonperturbative effects are taken into account, too. For the CP- and isospin-averaged branching ratios, we find B-s gamma = (3.36 +/- 0.23) x 10(-4) and B-d gamma = (1.73(-0.22)(+0.12)) x 10(-5), for E-gamma > 1.6 GeV. Both results remain in agreement with the current experimental averages. Normalizing their sum to the inclusive semileptonic branching ratio, we obtain R-gamma = (B-s gamma + B-d gamma)/B-clv= (3.31 +/- 0.22) x 10(-3). A new bound from B-s gamma on the charged Higgs boson mass in the two-Higgs-doublet-model II reads M-H +/- > 480 GeV at 95% C.L.
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