Momentum Dependent Two-Loop Corrections to the Neutral Higgs Boson Masses in the MSSM
Abstract
The momentum dependent two-loop contributions of the order $\mathcal{O}$($\alpha_s \alpha_t$) to the masses in the Higgs-boson sector of the MSSM are computed. Adopting the Feynman-diagrammatic approach and using a mixed on-shell/$\overline{DR}$ renormalization scheme, the new corrections can directly be matched onto the higher-order corrections included in the code FeynHiggs. Two-loop diagrams involving several mass scales are evaluated with the program SecDec. The combination of the new momentum dependent two-loop contribution with the existing one- and two-loop corrections leads to an improved prediction of the light MSSM Higgs-boson mass with reduced theoretical uncertainty. The resulting shifts in the lightest Higgs-boson mass $M_h$ can extend up to the level of the current experimental uncertainty of about 500 MeV in the scenario considered in these proceedings.
- Publication:
-
Proceedings of "Loops and Legs in Quantum Field Theory
- Pub Date:
- 2014
- DOI:
- 10.48550/arXiv.1410.0505
- arXiv:
- arXiv:1410.0505
- Bibcode:
- 2014dwpp.workE..33B
- Keywords:
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- High Energy Physics - Phenomenology
- E-Print:
- 8 pages, 3 figures, contribution to the proceedings of the Loops and Legs 2014 conference