Search for Light Scalars in the TRSM at the LHC

Abstract

We study the production of Beyond the Standard Model light scalar states in association with a vector boson ($V{h}_2$, with $V=W^{\pm },Z$) at the LHC. We consider the scenario where the Standard Model scalar sector is extended by two real scalar singlets, where these additional scalars have mass $M_i\le M_{h_{125}}$. In this work, the scalar boson $h_2$ decays via $h_2\to h_1{h}_1\to 4b$, while the associated vector boson decays either into a pair of oppositely charged leptons or into a single charged lepton and a neutrino. We analyze the signal using LHC detector parameterizations and evaluate its statistical significance at a center-of-mass energy of 13.6~TeV for integrated luminosities of 300~fb${}^{-1}$ and 3000~fb${}^{-1}$ corresponding to the LHC Run 3 and High Luminosity LHC, respectively. Our preliminary results indicate promising discovery prospects for this channel serving as a complementary probe of extended scalar sectors.\\ RBI-ThPhys-2026-04, COMETA-2026-04

9 pages, 2 figures, CORFU2025: Workshop on the Standard Model and Beyond