In the seesaw-extended NMSSM, a ~96 GeV scalar can reproduce both the LEP bbbar and CMS diphoton excesses while the sneutrino dark matter passes all current constraints, in three parameter regions.
Search for a light radion at HL-LHC and ILC250
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abstract
With the data collected by LHC at 13 TeV, the CMS collaboration has searched for low mass resonances decaying into two photons. This has resulted in the observation of 3 sd excess around 95 GeV, reminiscent of an indication obtained at LEP2 by combining the Higgs boson searches of the four LEP experiments. These observations, marginally significant, motivate the present study which shows how HL-LHC and ILC250 could search for a radion, the lightest new particle predicted within the Randall Sundrum (RS) model. ILC operating at a centre of mass energy of 250 GeV and with an integrated luminosity surpassing LEP2 by three orders of magnitude, could become the ideal machine to study a light radion and to observe, with very high accuracy, how it mixes with the Higgs boson and modifies the various couplings.
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The 96 GeV Diphoton Excess in the Seesaw Extensions of the Natural NMSSM
In the seesaw-extended NMSSM, a ~96 GeV scalar can reproduce both the LEP bbbar and CMS diphoton excesses while the sneutrino dark matter passes all current constraints, in three parameter regions.