Update of the flavour-physics constraints in the NMSSM

TL;DR

This paper updates the constraints from flavour-changing processes on the NMSSM parameter space, highlighting the impact of various observables and scenarios, including MSSM-like and light CP-odd Higgs cases, on model viability.

Contribution

It provides an updated analysis of flavour constraints in the NMSSM and incorporates these into the NMSSMTools package for improved testing.

Findings

Strong limits with large , light charged Higgs, or resonant pseudoscalar.

Constraints significantly restrict parameter space in specific scenarios.

Analysis clarifies the role of supersymmetric contributions in flavour-changing processes.

Abstract

We consider the impact of several flavour-changing observables in the $B$- and the Kaon sectors on the parameter space of the NMSSM, in a minimal flavour violating version of this model. Our purpose consists in updating our previous results in arXiv:0710.3714 and designing an up-to-date flavour test for the public package NMSSMTools. We provide details concerning our implementation of the constraints in a series of brief reviews of the current status of the considered channels. Finally, we present a few consequences of these flavour constraints for the NMSSM, turning to two specific scenarios: one is characteristic of the MSSM-limit and illustrates the workings of charged-Higgs and genuinely supersymmetric contributions to flavour-changing processes; the second focus is a region where a light CP-odd Higgs is present. Strong limits are found whenever an enhancement factor - large $\tan\beta$, light $H^{\pm}$, resonant pseudoscalar - comes into play.