Universality of nonperturbative QCD effects in radiative B-decays

Abstract

We demonstrate, by an explicit one-loop calculation, that at leading twist the nonperturbative effects in B -> gamma l nu, B -> gamma gamma and B -> gamma l+ l- radiative decays are contained in a common multiplicative factor (Λ_B(E_γ), where E_γis the energy of the photon). We argue that this result holds also at higher orders. Ratios of the amplitudes for these processes do not depend on scales below the mass of the B-meson (M_B), and can be calculated as perturbative series in α_s(M_B)

arXiv comment14 pages, 4 figures. Accepted for publication in Phys. Lett. B

References in corpus (16)

• Weak Decays Beyond Leading Logarithms
• An effective field theory for collinear and soft gluons: heavy to light decays
• QCD Factorization for $B\to \pi \pi$ Decays: Strong Phases and CP Violation in the Heavy Quark Limit
• QCD factorization for exclusive, non-leptonic B meson decays: General arguments and the case of heavy-light final states
• QCD Factorization in B -> pi K, pi pi Decays and Extraction of Wolfenstein Parameters
• Soft-collinear effective theory and heavy-to-light currents beyond leading power
• Symmetry-breaking corrections to heavy-to-light B meson form factors at large recoil
• Systematic approach to exclusive B ->V l^+l^-, V gamma decays
• Asymptotics of Heavy-Meson Form Factors
• Calculation of two-loop virtual corrections to b --> s l+ l- in the standard model
• Radiative leptonic decays of B mesons in QCD
• Infrared factorization in inclusive B meson decays
• Study of $B_{s,d}\to l^{+}{l}^{-}\gamma$ Decays
• The Double Radiative Decays $B\to \gamma \gamma$ in the Heavy Quark Limit
• Radiative Dileptonic Decays of B Mesons
• Charge Asymmetry and Photon Energy Spectrum in the Decay $B_s\to l^{+}{l}^{-}\gamma$

Cited by in corpus (15)

• The Zero-Bin and Mode Factorization in Quantum Field Theory
• The B-Meson Distribution Amplitude in QCD
• Factorization and Sudakov Resummation in Leptonic Radiative B Decay
• Rare radiative leptonic decays B_{d,s}-> l^+l^-γ
• QCD factorization for the four-body leptonic $B$-meson decays
• Study of $B_s\to {\ell }^{+}{\ell }^{-}\gamma$ decays in covariant quark model
• Operator product expansion for B-meson distribution amplitude and dimension-5 HQET operators
• Three-particle contributions to the renormalisation of B-meson light-cone distribution amplitudes
• Bs to mu mu gamma from Bs to mu mu
• Evolution equation for the B-meson distribution amplitude in the heavy-quark effective theory in coordinate space
• Spectator interactions in B -> V gamma decays and QCD factorisation
• Polarized forward-backward asymmetries of leptons in (B_s -> l^+ l^- gamma) decay
• Double-lepton polarizations in (B -> l^+ l^- gamma) decay
• Study of $B_s^0\to l^{+}{l}^{-}\gamma$ decays in the nonuniversal Z' model
• Can contribution from magnetic-penguin operator with real photon to $B_s\to {\ell }^{+}{\ell }^{-}\gamma$ in the standard model be neglected?