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 B_{SL} which suggests a large branching ratio for the decay $b \to sg$ 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. 
Alexey A. Petrov (University of Massachusetts)