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Author  |
ATLAS Collaboration (Aad, G. et al); Aikot, A.; Amos, K.R.; Bouchhar, N.; Cabrera Urban, S.; Cantero, J.; Castillo Gimenez, V.; Chitishvili, M.; Costa, M.J.; Curcio, F.; Didenko, M.; Escobar, C.; Fiorini, L.; Fuster, J.; Garcia, C.; Garcia Navarro, J.E.; Gomez Delegido, A.J.; Gonzalez de la Hoz, S.; Hofer, J.; Lacasta, C.; Lanzac Berrocal, M.; Marti-Garcia, S.; Martinez Agullo, P.; Melini, D.; Mitsou, V.A.; Monsonis Romero, L.; Moreno Llacer, M.; Munoz Perez, D.; Navarro-Gonzalez, J.; Poveda, J.; Rubio Jimenez, A.; Ruiz-Martinez, A.; Saibel, A.; Salt, J.; Sanchez Sebastian, V.; Senthilkumar, V.; Soldevila, U.; Sanchez, J.; Torro Pastor, E.; Valero, A.; Valiente Moreno, E.; Valls Ferrer, J.A.; Varriale, L.; Villaplana Perez, M.; Vos, M.; Zakareishvili, T. |
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Title |
Search for Higgs boson decays into a pair of pseudoscalar particles in the γγτhadτhad final state using pp collisions at √s=13 TeV with the ATLAS detector |
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Journal Article |
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Year |
2025 |
Publication |
Journal of High Energy Physics |
Abbreviated Journal |
J. High Energy Phys. |
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Volume |
03 |
Issue |
3 |
Pages |
190 - 39pp |
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Keywords |
Hadron-Hadron Scattering |
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Abstract |
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 tau-lepton pair, is presented. Hadronic decays of the tau-leptons are considered and reconstructed using a dedicated tagger for collimated tau-lepton pairs. The search uses 140 fb(-1) of proton-proton collision data at a centre-of-mass energy of root s = 13TeV 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 significant 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 gamma gamma tau tau final state, B(H -> aa -> gamma gamma tau tau), ranging from 0.2% to 2%, depending on the a-boson mass hypothesis. |
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Address |
[Fewell, M. P.; Gallagher, J.; Grant, C. M.; Green, M. J.; Jackson, P.; Kong, A. X. Y.; Pandya, H. D.; Ruggeri, T. A.; Saha, S.; Ting, E. X. L.; White, M. J.] Univ Adelaide, Dept Phys, Adelaide, SA, Australia |
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Publisher |
Springer |
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Language |
English |
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Notes |
WOS:001489934000001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
6818 |
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