How to trap a non-standard penguin? Isospin Symmetry Violations in B-decays with Enhanced Chromomagnetic Dipole Operator

A recently proposed Non-Standard Model solution to the problem of low semileptonic branching ratio BSL which suggests a large branching ratio for the decay b → sg is critically examined. It is shown that the effects of the Enhanced Chromomagnetic Dipole Operator might lead to significant violations of isospin symmetry in rare radiative decays of B-mesons. Typeset using REVTEX 1 It has been recently proposed that effects of New Physics associated with the gluonic dipole operator [1] provide an elegant and simple solution to the problem of low semileptonic branching ratio of B-mesons BSL simultaneously solving the problem of charm multiplicity nc. In these models, New Physics particles (e.g. techniscalars or supersymmetric particles) running inside of the penguin diagram loop significantly modify (increase) the Wilson coefficient C11 in front of the gluonic dipole operator O11 = gs 16π mbs̄σ μν 1 2 (1 − γ5)tbGμν in the effective Hamiltonian Heff = 4GF √ 2 [ VcbVcs(C1(μ)Oi(μ)C2(μ)O2(μ))− VtbV ∗ ts ∑