Электронный каталог

Статья

Aad, G.
Search for a Resonance Decaying into a Scalar Particle and a Higgs Boson in the Final State with Two Bottom Quarksa and Two Photons in Proton-Proton Collisions at *%s=13 TeV with the ATLAS Detector / G.Aad, F.Ahmadov, I.N.Aleksandrov, V.A.Bednyakov, I.R.Boyko, G.A.Chelkov, A.Cheplakov, M.V.Chizhov, D.V.Dedovich, M.Demichev, M.I.Gostkin, S.N.Karpov, Z.M.Karpova, U.Kruchonak, V.Kukhtin, E.Ladygin, V.Lyubushkin, T.Lyubushkina, S.Malyukov, M.Mineev, E.Plotnikova, I.N.Potrap, N.A.Rusakovich, M.Shiyakova, A.Soloshenko, S.Turchikhin, T.Turtuvshin, A.Vasyukov, I.Yeletskikh, A.Zhemchugov, N.I.Zimine, Y.Kulchitsky, [ATLAS Collab.] // Journal of High Energy Physics [Electronic resource]. – 2024. – Vol. 2024, No. 11. – P. 047. – URL: https://doi.org/10.1007/JHEP11(2024)047. – Bibliogr.: 98.

A search for the resonant production of a heavy scalar X decaying into a Higgs boson and a new lighter scalar S, through the process X → S(→bb^-)H(→γγ), where the two photons are consistent with the Higgs boson decay, is performed. The search is conducted using an integrated luminosity of 140 fb*−*1 of proton-proton collision data at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider. The search is performed over the mass range 170 ≤ m&sub(X) ≤ 1000 GeV and 15 ≤ m&sub(S) ≤ 500 GeV. Parameterised neural networks are used to enhance the signal purity and to achieve continuous sensitivity in a domain of the (m&sub(X), m&sub(S)) plane. No signifcant excess above the expected background is found and 95% CL upper limits are set on the cross section times branching ratio, ranging from 39 fb to 0.09 fb. The largest deviation from the background-only expectation occurs for (m&sub(X), m&sub(S)) = (575, 200) GeV with a local (global) signifcance of 3.5 (2.0) standard deviations.



ОИЯИ = ОИЯИ (JINR)2024