Loop effects and non-decoupling property of SUSY QCD in $g b\to tH^{-}$

Details Loop effects and non-decoupling property of SUSY QCD in $g b\to tH^{-}$ Loop effects and non-decoupling property of SUSY QCD in $g b\to tH^{-}$

2002-02-04

arxiv.org/abs/hep-ph/0202016v2

Phys.Rev. D66 (2002) 015007

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 5 PS figures. A proof of non-decouplings of SUSY-QCD, Comments on corresponding QCD correction and references added

Scientific paper

10.1103/PhysRevD.66.015007

One-loop SUSY QCD radiative correction to $gb \to tH^{-}$ cross section is calculated in the Minimal Supersymmetric Standard Model. We found that SUSY QCD is non-decoupling if the gluino mass and the parameter $\mu$, $A_t$ or $A_b$ are at the same order and get large. The non-decoupling contribution can be enhanced by large $\tan\beta$ and therefore large corrections to the hadronic production rates at the Tevatron and LHC are expected in the large $\tan\beta$ limit. The fundamental reason for such non-decoupling behavior is found to be some couplings in the loops being proportional to SUSY mass parameters.

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