O α s α t $$ \mathcal{O}\left({\alpha}_s{\alpha}_t\right) $$ (non)decoupling effects within the top-sector of the MSSM

Matching coefficients for α s and m b to O ( α 2 s ) in the MSSM

We compute the exact two-loop matching coefficients for the strong coupling constant αs and the bottom-quark mass mb within the Minimal Supersymmetric Standard Model (MSSM), taking into account O(αs) contributions from Supersymmetric Quantum Chromodynamics (SQCD). We find that the explicit mass pattern of the supersymmetric particles has a significant impact on the predictions of αs and mb at h...

Higgs Decay to Top Quarks at O ( α 2 s )

Three-loop corrections to the scalar and pseudo-scalar current correlator are calculated. By applying the large momentum expansion mass terms up to order (m2/q2)4 are evaluated analytically. As an application O(αs) corrections to the decay of a scalar and pseudo-scalar Higgs boson into top quarks are considered. It is shown that for a Higgs mass not far above the tt̄ threshold these higher order...

TOP QUARK PRODUCTION TO O ( α 2 s ) † ‡

O ( α s ) radiative corrections to polarized top decay into a charged Higgs t ( ↑ ) → H + + b

O(α s) radiative corrections to polarized top decay into a charged Higgs t(↑) → H + + b Abstract We calculate the O(α s) radiative corrections to polarized top quark decay into a charged Higgs and a bottom quark in Two-Higgs-Doublet-Models for nonzero bottom quark masses m b = 0. The radiative corrections to the polarization asymmetry parameter of the decay can become as large as 25 %. We provi...

T ∆(B−V)I ∆α ∆(B−V)O ∆α ∆(B−R)I ∆α ∆(B−R)O ∆α ∆(V −R)I ∆α ∆(V −R)O ∆α Break