%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 }