Speakers
Description
Identifying Lorentz-boosted Higgs bosons through their hadronic decay products provides a powerful approach to studying Higgs interactions and searching for new physics at the LHC. This talk presents recent CMS developments in transformer-based jet tagging and their applications to Higgs physics. The Particle Transformer exploits particle-level information and correlations to identify complex, multiprong H→WW* decays while controlling correlations with jet mass. Its performance and calibration using Lund jet plane reweighting are discussed, followed by its application to the first dedicated search for high-transverse-momentum Higgs production in the H→WW channel, including fully hadronic and semileptonic final states. The talk then presents a search for heavy resonances decaying to a Higgs boson and a photon, with H→bb reconstructed as a single large-radius jet, together with the complementary Zγ channel. Using 138 fb⁻¹ of proton–proton collision data at √s = 13 TeV, advanced bb tagging and jet-mass regression improve the sensitivity of the resonance search. No significant excess is observed, and stringent limits are set for resonance masses between 0.7 and 3.5 TeV. These results illustrate how advanced jet identification expands access to boosted Higgs signatures and searches for physics beyond the standard model.
