Role of gauge invariance in B -> V gamma radiative weak decays

Abstract

The role of gauge invariance in calculating B -> V gamma radiative weak decays is clarified. It is shown that the gauge invariance severely restricts the contributions mediated by the usual weak non-leptonic Hamiltonian dominated by u and c quaks with one photon attachment. Such contributions are found to be almost negligible.

5 pages, Revtex, no figures

References in corpus (4)

• Systematic approach to exclusive B ->V l^+l^-, V gamma decays
• The Radiative Decays B -> V gamma at Next-to-Leading Order in QCD
• Branching Ratios for $B\to K^{\ast }\gamma$ and $B\to \rho \gamma$ Decays in Next-to-Leading Order in the Large Eneregy Effective Theory
• On vanishing of the factorizable $c\bar{c}$ contribution in the radiative $B\to K^{\ast }\gamma$ decay

Cited by in corpus (2)

• Counting contact terms in $B\to V\gamma$ decays
• Form factors and branching ratio for the B -> l nu gamma decay