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      Measurement of an excess of\(\overline{B}\to {D}^{\mathbf{(}*\mathbf{)}}{\tau }^{\mathbf{-}}{\overline{\nu }}_{\tau }\)decays and implications for charged Higgs bosons

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      Physical Review D
      American Physical Society (APS)

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          Review of Particle Physics

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            Weak transition form factors between heavy mesons

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              Estimate of\(\mathcal{B}(\overline{B}\to {X}_{s}\gamma )\)at\(O({\alpha }_{s}^{2})\)

              Combining our results for various O(alpha[s]) corrections to the weak radiative B-meson decay, we are able to present the first estimate of the branching ratio at the next-to-next-to-leading order in QCD. We find B(B[over ]-->X[s]gamma)=(3.15+/-0.23) x 10(-4) for Egamma>1.6 GeV in the B[over ]-meson rest frame. The four types of uncertainties:nonperturbative (5%), parametric (3%), higher-order (3%), and m(c)-interpolation ambiguity (3%) have been added in quadrature to obtain the total error.
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                Author and article information

                Journal
                PRVDAQ
                Physical Review D
                Phys. Rev. D
                American Physical Society (APS)
                1550-7998
                1550-2368
                October 2013
                October 31 2013
                : 88
                : 7
                Article
                10.1103/PhysRevD.88.072012
                137870ef-2ac8-4013-86bc-28b9d4b600f6
                © 2013

                http://link.aps.org/licenses/aps-default-license

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