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Results are presented for the leading two-loop contributions of O(alpha_t alpha_s) to the masses and mixing effects in the Higgs sector of the MSSM with complex parameters. They are obtained in the Feynman-diagrammatic approach using…

High Energy Physics - Phenomenology · Physics 2008-11-26 S. Heinemeyer , W. Hollik , H. Rzehak , G. Weiglein

We generalize the analytical expressions for the two-loop leading-log neutral Higgs boson masses and mixing angles to the case of general left- and right-handed soft supersymmetry breaking stop and sbottom masses and left--right mixing mass…

High Energy Physics - Phenomenology · Physics 2008-11-26 M. Carena , M. Quiros , C. E. M. Wagner

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…

High Energy Physics - Phenomenology · Physics 2014-10-03 S. Borowka

The leading electroweak MSSM two-loop corrections to the $\rho$-parameter are calculated. They are obtained by evaluating the two-loop self-energies of the Z and the W boson at O(Gf^2 m_t^4) in the limit of heavy scalar quarks. A very…

High Energy Physics - Phenomenology · Physics 2007-05-23 S. Heinemeyer , G. Weiglein

We compute the two-loop QCD corrections to the neutral Higgs-boson masses in the MSSM, including the effect of non-vanishing external momenta in the self-energies. We obtain corrections of O(alpha_t*alpha_s) and O(alpha*alpha_s), i.e., all…

High Energy Physics - Phenomenology · Physics 2015-06-23 G. Degrassi , S. Di Vita , P. Slavich

The mass of the Higgs boson in the Split Supersymmetric Standard Model is calculated, including all one-loop threshold effects and the renormalization group evolution of the Higgs quartic coupling through two-loops. The two-loop corrections…

High Energy Physics - Phenomenology · Physics 2011-01-13 Michael Binger

The top-Yukawa-coupling enhanced two-loop corrections to the charged Higgs-boson mass in the real MSSM are presented. The contributing two-loop self-energies are calculated in the Feynman- diagrammatic approach in the gaugeless limit with…

High Energy Physics - Phenomenology · Physics 2015-07-10 Wolfgang Hollik , Sebastian Paßehr

We review various effective potential methods which have been useful to compute the Higgs mass spectrum and couplings of the minimal supersymmetric standard model. We compare results where all-loop next-to-leading-log corrections are…

High Energy Physics - Phenomenology · Physics 2007-05-23 M. Quirós

We provide a full one-loop calculation of the self energies and tadpoles of the neutral Higgs bosons of the NMSSM. In addition, we compute the two-loop O(alpha_t*alpha_s+alpha_b*alpha_s) corrections to the neutral Higgs boson masses in the…

High Energy Physics - Phenomenology · Physics 2009-11-09 G. Degrassi , P. Slavich

We compute the upper bound on the mass of the lightest Higgs boson in the Minimal Supersymmetric Standard Model in a model-independent way, including leading (one-loop) and next-to-leading order (two-loop) radiative corrections. We find…

High Energy Physics - Phenomenology · Physics 2011-05-05 J. A. Casas , J. R. Espinosa , M. Quirós , A. Riotto

Within the minimal supersymmetric extension of the Standard Model, the mass of the light CP-even Higgs boson is computed to three-loop accuracy, taking into account the next-to-next-to-leading order effects from supersymmetric Quantum…

High Energy Physics - Phenomenology · Physics 2008-11-26 R. V. Harlander , P. Kant , L. Mihaila , M. Steinhauser

Recent results for the leading $\mathcal{O}{\left(\alpha_t^2\right)}$ two-loop corrections to the Higgs-boson masses of the MSSM with complex parameters are presented. The strategy of the Feynman-diagrammatic, analytical calculation is…

High Energy Physics - Phenomenology · Physics 2015-04-16 Wolfgang Hollik , Sebastian Paßehr

We present the impact of two-loop corrections on the mass of the lightest Higgs boson in the Minimal R-symmetric Supersymmetric Standard Model (MRSSM). These shift the Higgs boson mass up by typically 5 GeV or more. The dominant corrections…

High Energy Physics - Phenomenology · Physics 2015-04-22 Philip Diessner , Jan Kalinowski , Wojciech Kotlarski , Dominik Stöckinger

We improve the determination of the Higgs-boson mass in the MSSM with heavy superpartners, by computing the two-loop threshold corrections to the quartic Higgs coupling that involve both the strong and the electroweak gauge couplings.…

High Energy Physics - Phenomenology · Physics 2019-11-15 Emanuele Bagnaschi , Giuseppe Degrassi , Sebastian Paßehr , Pietro Slavich

We present the currently most precise predictions for the $W$-boson mass and the leptonic effective mixing angle $\sin^2\theta_{\text{eff}}$ in the aligned Two-Higgs-Doublet Model. The evaluation includes the full one-loop result, all known…

High Energy Physics - Phenomenology · Physics 2022-12-21 Stephan Hessenberger , Wolfgang Hollik

We evaluate O(alpha_b alpha_s) corrections in the MSSM Higgs boson sector, including an analysis of the renormalization in the bottom/scalar bottom sector. For mu < 0 the genuine two-loop corrections to the mass of the lightest Higgs boson…

High Energy Physics - Phenomenology · Physics 2007-05-23 S. Heinemeyer , W. Hollik , H. Rzehak , G. Weiglein

In supersymmetric models with minimal particle content and without left-right squark mixing, the conventional wisdom is that the 125.6 GeV Higgs boson mass implies top squark masses of O(10) TeV, far beyond the reach of colliders. This…

High Energy Physics - Phenomenology · Physics 2013-10-02 Jonathan L. Feng , Philipp Kant , Stefano Profumo , David Sanford

In this article we provide explicit computations of the quantum corrections to the lightest CP-even Higgs Boson mass in the real version of the Minimal Supersymmetric Standard Model. We compute the contributions coming from the SUSY-QCD…

High Energy Physics - Phenomenology · Physics 2019-04-01 E. A. Reyes R. , A. R. Fazio

The masses of the neutral CP-even Higgs bosons in the Minimal Supersymmetric Standard Model (MSSM) are predicted on the basis of explicit Feynman-diagrammatic calculations. The results, containing the complete diagrammatic one-loop…

High Energy Physics - Phenomenology · Physics 2011-03-02 S. Heinemeyer , W. Hollik , G. Weiglein

We present an improved calculation of the light CP-even Higgs boson pole mass in the MSSM based on the FlexibleEFTHiggs hybrid method. The calculation resums large logarithms to all orders and includes power-suppressed terms at fixed order.…

High Energy Physics - Phenomenology · Physics 2023-08-08 Thomas Kwasnitza , Dominik Stöckinger , Alexander Voigt