Speaker
Saiyad Ashanujjaman
(TTP & IAP, KIT)
Description
The discovery of the 125 GeV Higgs boson marked the final piece of the Standard Model (SM), but no new particles have been observed since. However, multi-lepton anomalies at the LHC hint at a new scalar between 145–155 GeV, decaying mainly to WW, with no corresponding ZZ signal—suggesting a neutral $SU(2)_L$ triplet. Recasting ATLAS Run-2 di-photon data reveals a 4σ excess near 152 GeV and a preferred di-photon branching ratio of (0.7 ± 0.2)%. If confirmed, this would be the strongest evidence yet for new physics at the LHC.
Author
Saiyad Ashanujjaman
(TTP & IAP, KIT)
