Two-loop contributions to electroweak precision observables in the MSSM

2005/06/24 by J. Haestier, D. Stöckinger, Haestier, J. +6
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/0506259

Talk given by D.S. at the 2005 International Linear Collider Workshop - Stanford, USA. 6 pages, 5 figures, misprint corrected

openalex publication_date 2005/06/24 · arxiv created 2005/07/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The evaluation of the two-loop MSSM-contributions to the electroweak precision observables M_W and s_w^eff at order(alpha_t²), order(alpha_t alpha_b), order(alpha_b²) is presented. These contributions enter via Delta(rho), and it is explained in detail how one can retain the true, non-vanishing value of the MSSM Higgs boson mass M_h in spite of using the gauge-less limit in the calculation. The numerical results can be sizeable, in particular for strong squark mixing. By comparing the results in the on-shell and DR-bar renormalization schemes, the remaining theoretical uncertainty is found to be small.

Related

• Precision Observables in the MSSM: Leading Electroweak Two-loop Corrections
• Precision Observables in the MSSM: Status and Perspectives
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