The dominant electroweak two-loop corrections to the precision observables
M_W and s_w^eff are calculated in the MSSM. They are obtained by evaluating the
two-loop Yukawa contributions of O(alpha_t^2), O(alpha_t alpha_b), O(alpha_b^2)
to the quantity Delta rho. The result, involving the contributions from
Standard Model fermions, sfermions, Higgs bosons and higgsinos, is derived in
the gauge-less limit for arbitrary values of the lightest CP-even Higgs boson
mass. A thorough discussion of the parameter relations enforced by
supersymmetry is given, and two different renormalization schemes are applied.
Compared to the previously known result for the quark-loop contribution we find
a shift of up to +8 MeV in M_W and -4 * 10^-5 in s_w^eff. Detailed numerical
estimates of the remaining uncertainties of M_W and s_w^eff from unknown
higher-order contributions are obtained for different values of the
supersymmetric mass scale.
Description
Electroweak Precision Observables: Two-Loop Yukawa Corrections of
Supersymmetric Particles
%0 Generic
%1 haestier2005electroweak
%A Haestier, J.
%A Heinemeyer, S.
%A Stöckinger, D.
%A Weiglein, G.
%D 2005
%K W boson electroweak higgs quark top
%R 10.1088/1126-6708/2005/12/027
%T Electroweak Precision Observables: Two-Loop Yukawa Corrections of
Supersymmetric Particles
%U http://arxiv.org/abs/hep-ph/0508139
%X The dominant electroweak two-loop corrections to the precision observables
M_W and s_w^eff are calculated in the MSSM. They are obtained by evaluating the
two-loop Yukawa contributions of O(alpha_t^2), O(alpha_t alpha_b), O(alpha_b^2)
to the quantity Delta rho. The result, involving the contributions from
Standard Model fermions, sfermions, Higgs bosons and higgsinos, is derived in
the gauge-less limit for arbitrary values of the lightest CP-even Higgs boson
mass. A thorough discussion of the parameter relations enforced by
supersymmetry is given, and two different renormalization schemes are applied.
Compared to the previously known result for the quark-loop contribution we find
a shift of up to +8 MeV in M_W and -4 * 10^-5 in s_w^eff. Detailed numerical
estimates of the remaining uncertainties of M_W and s_w^eff from unknown
higher-order contributions are obtained for different values of the
supersymmetric mass scale.
@misc{haestier2005electroweak,
abstract = {The dominant electroweak two-loop corrections to the precision observables
M_W and s_w^eff are calculated in the MSSM. They are obtained by evaluating the
two-loop Yukawa contributions of O(alpha_t^2), O(alpha_t alpha_b), O(alpha_b^2)
to the quantity Delta rho. The result, involving the contributions from
Standard Model fermions, sfermions, Higgs bosons and higgsinos, is derived in
the gauge-less limit for arbitrary values of the lightest CP-even Higgs boson
mass. A thorough discussion of the parameter relations enforced by
supersymmetry is given, and two different renormalization schemes are applied.
Compared to the previously known result for the quark-loop contribution we find
a shift of up to +8 MeV in M_W and -4 * 10^-5 in s_w^eff. Detailed numerical
estimates of the remaining uncertainties of M_W and s_w^eff from unknown
higher-order contributions are obtained for different values of the
supersymmetric mass scale.},
added-at = {2013-08-05T18:06:29.000+0200},
author = {Haestier, J. and Heinemeyer, S. and Stöckinger, D. and Weiglein, G.},
biburl = {https://www.bibsonomy.org/bibtex/25b47f137d2a5d89388f02adada464e6a/kreczko},
description = {Electroweak Precision Observables: Two-Loop Yukawa Corrections of
Supersymmetric Particles},
doi = {10.1088/1126-6708/2005/12/027},
interhash = {c4b5c1fbe4ec2e425537ebb2777738f8},
intrahash = {5b47f137d2a5d89388f02adada464e6a},
keywords = {W boson electroweak higgs quark top},
note = {arxiv:hep-ph/0508139},
timestamp = {2014-07-27T00:02:59.000+0200},
title = {Electroweak Precision Observables: Two-Loop Yukawa Corrections of
Supersymmetric Particles},
url = {http://arxiv.org/abs/hep-ph/0508139},
year = 2005
}