Speaker
Description
Many BSM models predict the existence of additional Higgs-like scalar bosons, including the two-Higgs-doublet model, the Next-to-Minimal Supersymmetric Standard Model, and the Two-Real-Singlet-Model, among others. The existence of these particles would be consistent with a first order phase transition during the early universe, which could explain the matter-antimatter asymmetry we observe in the universe. Searches for these particles via the X to SH process, where X and S are BSM Higgs-like scalar bosons, have been performed by the ATLAS and CMS experiments in multiple final states using the Run 2 dataset. Excesses of this process were observed in the two photon, two b-quark final state by both the ATLAS and CMS experiments using their Run 2 datasets in different regions of the two dimensional mass plane, strongly motivating the extension of these analyses with the newly collected Run 3 data. This talk will present the first Run 3 ATLAS search for X to SH in the two b-quark, two photon final state, where a combination of the Run 2 and partial Run 3 dataset is performed.
