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Theoretical Uncertainties and Phenomenological Aspects of B->Xsg Decay

A. Buras
M. Misiak
M. Munz
S. Pokorski
Journal / Anthology

Nuclear Physics B
Year: 1994
Volume: 424
Page range: 374-398

We analyze uncertainties in the theoretical prediction for the inclusive branching ratio BR[B-> Xsg]. We find that the dominant uncertainty in the leading order expression comes from its m-dependence. We discuss a next-to-leading order calculation B-> Xsg in general terms and check to what extent the m-dependence can be reduced in such a calculation. We present constraints on the Standard and Two-Higgs-Doublet Model parameters coming from the measurement of b->sg decay. The current theoretical uncertainties do not allow one to definitively restrict the Standard Model parameters much beyond the limits coming from other experiments. The bounds on the Two-Higgs-Doublet Model remain very strong, though significantly weaker than the ones present in the recent literature. In the Two-Higgs-Doublet Model case, the b->sg, Z->bb and b->crvr processes are enough to give the most restrictive bounds in the MH+-tanB plane.

*Science > Physics > Quantum Physics