Search

In 2018, the CMS collaboration reported a di-photon excess around 95.3 GeV with a local significance of 2.8 $\sigma$. Interestingly, the CMS collaboration also reported a di-tau excess recently at 95$\sim$100 GeV with a local significance of 2.6$\sim$3.1 $\sigma$. Besides, an $b\bar{b}$ excess at 98 GeV with 2.3$\sigma$ local significance was reported with LEP data about twenty years ago. In this work, we consider interpreting these excesses together with a light Higgs boson in the next-to-minimal supersymmetric standard model (NMSSM). We conclude that it is difficult to satisfy the 125 GeV Higgs data and the 95$\sim$100 GeV excesses both well in NMSSM, and with the latter satisfied at 2$\sigma$ level, the former can be about $42\%$ at most. An approximate equation of global fit to the three excesses is derived, and two representative types of surviving samples are analyzed in detail. Since the mass regions of these excesses are near the Z boson, we also consider checking the light Higgs boson in the $t\bar{t}$-associated channels. The detailed results may be useful for further checking the low-mass-region excesses in the future., Comment: 7 pages, 4 figures, 2 tables