Two-loop Higgs mass calculations in supersymmetric models beyond the MSSM with SARAH and SPheno

Abstract:We provide the two-loop corrections to the Higgs boson masses of the CPviolating NMSSM in the Feynman diagrammatic approach with vanishing external momentum at O(α t α s ). The adopted renormalization scheme is a mixture between DR and on-shell conditions. Additionally, the renormalization of the top/stop sector is provided both for the DR and the on-shell scheme. The calculation is performed in the gaugeless limit. We find that the two-loop corrections compared to the one-loop corrections are of the order of 5-10%, depending on the top/stop renormalization scheme. The theoretical error on the Higgs boson masses is reduced due to the inclusion of these higher order corrections.

Section: Jhep05(2015)128mentioning

confidence: 99%

Two-loop contributions of the order O α t α s $$ \mathcal{O}\left({\alpha}_t{\alpha}_s\right) $$ to the masses of the Higgs bosons in the CP-violating NMSSM

Mühlleitner

Nhung

Rzehak

et al. 2015

“…SARAH [91][92][93][94] and SPheno [95][96][97][98][99] were used for model building and spectrum generation respectively. The spectra generated by SPheno include complete two-loop corrections to Higgs mass even from NH parameters [100,101]. The numerical study is performed in three different set-ups of non-vanishing vevs.…”

Section: Resultsmentioning

confidence: 99%

Exploring charge and color breaking vacuum in non-holomorphic MSSM

Beuria

Dey

2017

Non-Holomorphic MSSM (NHSSM) shows various promising features that are not easily obtained in MSSM. However, the additional Non-Holomorphic (NH) trilinear interactions that attribute to the interesting phenomenological features, also modify the effective scalar potential of the model significantly. We derive analytic constraints involving trilinear parameters A t and A b that exclude global charge and color breaking minima (CCB). Since the analytic constraints are obtained considering specific directions in the multi-dimensional field space, we further probe the applicability of these constraints by exhaustive scan over NH parameter space with two different regimes of tan β and delineate the nature of metastability by considering vacuum expectation values for third generation squarks. We adhere to a natural scenario by fixing Higgsino mass parameter (µ) to a low value and estimate the allowed ranges of NH trilinear parameters by considering vacuum stability and observed properties of Higgs as the determining criteria.

“…The latter focuses on the CP-conserving NMSSM, while NMSSMCALC allows for CP-violation but specializes in corrections to the Higgs spectrum. Multi-purpose programs can also be used in connection to the (complex) NMSSM and allow for a number of similar manipulations, provided the implementation of a model-file as input: this applies to SPHENO [35][36][37][38] or FlexibleSUSY [39,40] -which are usually coupled to SARAH [41][42][43][44] to produce their input file. The Higgs-sector of the complex NMSSM and its phenomenology have been previously considered in several earlier works [45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63].…”

Section: Jhep06(2015)052mentioning

confidence: 99%

A new tool for the study of the CP-violating NMSSM

Domingo

2015

Supersymmetric extensions of the Standard Model open up the possibility for new types of CP-violation. We consider the case of the Next-to-Minimal Supersymmetric Standard Model where, beyond the phases from the soft lagrangian, CP-violation could enter the Higgs sector directly at tree-level through complex parameters in the superpotential. We develop a series of Fortran subroutines, cast within the public tool NMSSMTools and allowing for a phenomenological analysis of the CP-violating NMSSM. This new tool performs the computation of the masses and couplings of the various new physics states in this model: leading corrections to the sparticle masses are included; the precision for the Higgs masses and couplings reaches the full one-loop and leading two-loop order. The two-body Higgs and top decays are also attended. We use the public tools HiggsBounds and HiggsSignals to test the Higgs sector. Additional subroutines check the viability of the sparticle spectrum in view of LEP-limits and constrain the phases of the model via a confrontation to the experimentally measured Electric Dipole Moments. These tools will be made publicly available in the near future. In this paper, we detail the workings of our code and illustrate its use via a comparison with existing results. We also consider some consequences of CP-violation for the NMSSM Higgs sector.