A search is presented for a new scalar resonance, X, decaying to a standard model Higgs boson and another new scalar particle, Y, in the final state where the Higgs boson decays to a b (b) over bar pair, while the Y particle decays to a pair of photons. The search is performed in the mass range 240-1000 GeV for the resonance X, and in the mass range 70-800 GeV for the particle Y, using proton-proton collision data collected by the CMS experiment at root s = 13 TeV, corresponding to an integrated luminosity of 132 fb(-1). In general, the data are found to be compatible with the standard model expectation. Observed (expected) upper limits at 95% confidence level on the product of the production cross section and the relevant branching fraction are extracted for the X -> YH process, and are found to be within the range of 0.05-2.69 (0.08-1.94) fb, depending on m(X) and m(Y). The most significant deviation from the background-only hypothesis is observed for X and Y masses of 300 and 77 GeV, respectively, with a local (global) significance of 3.33 (0.65) standard deviations.

Search for a new scalar resonance decaying to a Higgs boson and another new scalar particle in the final state with two bottom quarks and two photons in proton-proton collisions at $$\sqrt{s}=13$$ TeV

Alexe, C.;Bruschini, D.;Ligabue, F.;
2025

Abstract

A search is presented for a new scalar resonance, X, decaying to a standard model Higgs boson and another new scalar particle, Y, in the final state where the Higgs boson decays to a b (b) over bar pair, while the Y particle decays to a pair of photons. The search is performed in the mass range 240-1000 GeV for the resonance X, and in the mass range 70-800 GeV for the particle Y, using proton-proton collision data collected by the CMS experiment at root s = 13 TeV, corresponding to an integrated luminosity of 132 fb(-1). In general, the data are found to be compatible with the standard model expectation. Observed (expected) upper limits at 95% confidence level on the product of the production cross section and the relevant branching fraction are extracted for the X -> YH process, and are found to be within the range of 0.05-2.69 (0.08-1.94) fb, depending on m(X) and m(Y). The most significant deviation from the background-only hypothesis is observed for X and Y masses of 300 and 77 GeV, respectively, with a local (global) significance of 3.33 (0.65) standard deviations.
2025
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
   Search for Higgs bosons decaying to charm quarks
   HIGCC
   European Commission
   Horizon 2020 Framework Programme
   724704

   Advanced Multi-Variate Analysis for New Physics Searches at the LHC
   AMVA4NewPhysics
   European Commission
   Horizon 2020 Framework Programme
   675440

   Direct and indirect searches for new physics in events with top quarks using LHC proton-proton collisions at the CMS detector
   LHCTOPVLQ
   European Commission
   Horizon 2020 Framework Programme
   752730
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/160545
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