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.

Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Andrejkovic, J.W., Benato, L., et al. (2025). 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 √s=13 TeV. JOURNAL OF HIGH ENERGY PHYSICS(12) [10.1007/JHEP12(2025)178].

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 √s=13 TeV

Ciocci, M. A.;Turini, N.;
2025-01-01

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
Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Andrejkovic, J.W., Benato, L., et al. (2025). 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 √s=13 TeV. JOURNAL OF HIGH ENERGY PHYSICS(12) [10.1007/JHEP12(2025)178].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/1324157
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