Электронный каталог

Статья

Aad, G.
Search for Higgs Boson Decays into a Pair of Pseudoscalar Particles in the *g*g*t&sub(had)*t&sub(had) Final State Using pp Collisions at *%s=13 TeV with the ATLAS Detector / G.Aad, F.Ahmadov, I.N.Aleksandrov, V.A.Bednyakov, I.R.Boyko, G.Chelkov, A.Cheplakov, M.V.Chizhov, D.V.Dedovich, M.Demichev, A.R.Didenko, M.I.Gostkin, S.N.Karpov, Z.M.Karpova, U.Kruchonak, V.Kukhtin, Y.Kulchitsky, E.Ladygin, V.Lyubushkin, T.Lyubushkina, S.Malyukov, M.Mineev, E.Plotnikova, I.N.Potrap, M.Shiyakova, A.Soloshenko, A.Tropina, P.V.Tsiareshka, T.Turtuvshin, A.Vasyukov, I.Yeletskikh, A.Zhemchugov, N.I.Zimine, [ATLAS Collab.]. – Text: electronic // Journal of High Energy Physics. – 2025. – Vol. 2025, No. 3. – P. 190. – URL: https://doi.org/10.1007/JHEP03(2025)190. – Bibliogr.: 79.

A search for exotic decays of the 125 GeV Higgs boson into a pair of new spin-0 particles, H → aa, where one decays into a photon pair and the other into a τ -lepton pair, is presented. Hadronic decays of the τ -leptons are considered and reconstructed using a dedicated tagger for collimated τ -lepton pairs. The search uses 140 fb*−*1 of proton-proton collision data at a centre-of-mass energy of √ s = 13 TeV recorded between 2015 and 2018 by the ATLAS experiment at the Large Hadron Collider. The search is performed in the mass range of the a boson between 10 GeV and 60 GeV. No signifcant excess of events is observed above the Standard Model background expectation. Model-independent upper limits at 95% confidence level are set on the branching ratio of the Higgs boson to the γγττ fnal state, B(H → aa → γγττ ), ranging from 0.2% to 2%, depending on the a-boson mass hypothesis.



ОИЯИ = ОИЯИ (JINR)2025