SUSY-QCD decoupling properties in H+ -> t \bar b decay

Details SUSY-QCD decoupling properties in H+ -> t \bar b decay SUSY-QCD decoupling properties in H+ -> t \bar b decay

2001-05-10

arxiv.org/abs/hep-ph/0105097v1

Phys.Rev.D64:115003,2001

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 33 pages, 7 figure included. Uses cite.sty

Scientific paper

10.1103/PhysRevD.64.115003

The SUSY-QCD radiative corrections to the \Gamma (H+ -> t \bar b) partial decay width are analyzed within the Minimal Supersymmetric Standard Model at the one-loop level, {\mathcal O}(\alpha_s), and in the decoupling limit. We present the analytical expressions of these corrections in the large SUSY masses limit and study the decoupling behaviour of these corrections in various limiting cases. We find that if the SUSY mass parameters are large and of the same order, the one loop SUSY-QCD corrections {\it do not decouple}. The non-decoupling contribution is enhanced by \tan \beta and therefore large corrections are expected in the large \tan \beta limit. In contrast, we also find that the SUSY-QCD corrections decouple if the masses of either the squarks or the gluinos are separately taken large.

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