Speaker
Description
Investigation for exotic decays of the scalar boson into a pair of light CP-even scalar particles, $ p p\to H_2 V \to H_1 H_1$, where the $H_1$-boson promptly decays into b-quarks and has a mass in the range of $20-60$ GeV, is presented within the framework of the Two Real Singlet Model (TRSM). This model extends the Standard Model by introducing two real scalar singlets that interact with Standard Model particles through their mixing with the Higgs boson, resulting in three CP-even Higgs states $h_i (i=1,2,3)$. The search is conducted in events where the Higgs boson is produced in association with a $W$- and $Z$-boson, leading to distinct signatures: either one charged lepton (electron or muon) and missing transverse energy or two charged leptons, accompanied by multiple jets from b-quark decays. A systematic scan over the TRSM parameter space is performed, taking into account all available theoretical and experimental bounds, to identify regions with potentially observable signals. Using Monte Carlo (MC) analysis, we evaluate the signal-to-background ratio for the final states $4b + l^+ + v_l$, $ 4b+l^-+\bar{v_l}$, and $\ 4b + l^+ l^-$ so that, the sensitivity of the ATLAS and CMS experiments at a collision energy of 13 TeV and an integrated luminosity of $139$ fb$^{-1}$ is assessed for these signals.
