Speaker
Mr
Junquan TAO
(IHEP/CAS)
Description
Some BSM, such as NMSSM and 2HDM, predict modified and extended Higgs sector, possibly with additional low mass (m_h<125GeV) scalars/pseudoscalars. Considering the results of the Higgs boson searches from the LHC, we study the lightest scalar Higgs boson h1 in the Next-to-Minimal Supersymmetric Standard Model by restricting the next-to-lightest scalar Higgs boson h2 to be the observed to the 125 GeV state. We find that the signal rate in the two-photon final state for the NMSSM Higgs boson h1 with the mass range from about 80 GeV to about 122 GeV can be enhanced by a factor of up to 3.5 when the Higgs boson h2 is required to be compatible with the excess from latest LHC results. With 8TeV data of 19.7 fb-1 integrated luminosity, a search for a new resonance decaying into two photons is performed on CMS, for the diphoton invariant mass range between 80 and 110 GeV. The expected and observed 95% confidence level upper limits on the product of the cross-section with the branching ratio into two photons are presented. No significant excess with respect to the expected limit is observed.Based on the CMS results, the interpretations with 2HDM are performed. We have found that some sensitivity in the VBF and VH production modes is expected even simply recasting an existing Run 1 CMS analysis. A lighter (than the 125 GeV Higgs boson) neutral scalar or pseudo-scalar particle is not completely excluded by present bounds and searches.
Primary author
Mr
Junquan TAO
(IHEP/CAS)
Co-author
Ms
Sijing Zhang
(league member)
