2 HIGGS DOUBLET MODEL PREDICTIONS FOR B-]X-S-GAMMA IN NLO QCD - ART. NO. 074004

The decay (B) over bar-->X(s)gamma is studied at next to leading order in QCD in a class of models containing at least two Higgs doublets an d with only one charged Higgs boson nondecoupled at low energy. The tw o-loop matching condition is calculated and it is found to agree with existing results. The complete dependence of the Wilson coefficients o n the matching scale is given. The size of the next to leading order c orrections is extensively discussed. Results for branching ratios, pos sible CP asymmetries, and lower bounds on the charged Higgs boson mass are presented when the convergence of the perturbative series appears fast enough to yield reliable predictions. Regions in the parameter s pace of these models where the next to leading order calculation is st ill not a good approximation of the final result for these observables are singled out. [S0556-2821(98)07217-8]