New Regions in the NMSSM with a 125 GeV Higgs

Understand

It is pointed out that mixing effects in the CP-even scalar sector of the NMSSM can give 6-8 GeV correction to the SM-like Higgs mass in moderate or large $\tan\beta$ regions with a small value of the singlet-higgs-higgs superfields coupling $\lambda\sim\mathcal{O}(0.1)$.

• This effect comes mainly from the mixing of the SM-like Higgs with lighter singlet.
• In the same parameter range, the mixing of the heavy doublet Higgs with the singlet may strongly modify the couplings of the singlet-like and the 125 GeV scalars.
• Firstly, the LEP bounds on a light singlet can be evaded for a large range of its masses.