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One-loop renormalisation of the NMSSM in SloopS 2: the Higgs sector | | G. Bélanger
; V. Bizouard
; F. Boudjema
; G. Chalons
; | | Date: |
5 May 2017 | | Abstract: | We present a full one-loop renormalisation of the Higgs sector of the
Next-to-Minimal- Supersymmetric-Standard-Model (NMSSM) and its implementation
within SloopS, a code for the automated computations of one-loop processes in
theories beyond the Stan- dard Model. The present work is the sequel to the
study we performed on the renor- malisation of the sectors of the NMSSM
comprising neutralinos, charginos and sfermions thereby completing the full
one-loop renormalisation of the NMSSM. We have investi- gated several
renormalisation schemes based on alternative choices (on-shell or DR) of the
physical parameters. Special attention is paid to the issue of the mixing
between physical fields. To weigh the impact of the different renormalisation
schemes, the partial widths for the decays of the Higgs bosons into
supersymmetric particles are computed at one-loop. In many decays large
differences between the schemes are found. We discuss the origin of these
differences. In particular we study two contrasting scenarios. The first model
is MSSM-like with a small value for the mixing between the doublet and sin-
glet Higgs superfields while the second model has a moderate value for this
mixing. We critically discuss the issue of the reconstruction of the underlying
parameters and their counterterms in the case of a theory with a large number
of parameters, such as the NMSSM, from a set of physical parameters. In the
present study this set corresponds to the minimum set of masses for the
implementation of the on-shell schemes. | | Source: | arXiv, 1705.2209 | | Services: | Forum | Review | PDF | Favorites | |
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