New moment relations for the soft function g17, combined with a 2016 global fit of HQET parameters, tighten the resolved photon contribution to the B -> X_s gamma total rate to about [-0.3,+1.6]% but widen the CP-asymmetry window to [-1.9,+3.3]%.
B -> Xs gamma - Current Status
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abstract
Our current knowledge of BR(B -> Xs gamma) is briefly summarized, with particular attention to uncertain non-perturbative effects.
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2019 1verdicts
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Reevaluating Uncertainties in $\bar B\to X_s\gamma$ Decay
New moment relations for the soft function g17, combined with a 2016 global fit of HQET parameters, tighten the resolved photon contribution to the B -> X_s gamma total rate to about [-0.3,+1.6]% but widen the CP-asymmetry window to [-1.9,+3.3]%.