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Author  |
ATLAS Collaboration (Aad, G. et al); Aikot, A.; Amos, K.R.; Bouchhar, N.; Cabrera Urban, S.; Cantero, J.; Carrion Martinez, C.; Castillo Gimenez, V.; Chitishvili, M.; Costa, M.J.; Curcio, F.; Didenko, M.; Escobar, C.; Fiorini, L.; Fuster, J.; Garcia, C.; Garcia Navarro, J.E.; Gonzalez de la Hoz, S.; Hofer, J.; Jimenez Ortega, M.; 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.; Poveda, J.; Rubio Jimenez, A.; Ruiz-Martinez, A.; Saibel, A.; Salt, J.; Sanchez Sebastian, V.; Senthilkumar, V.; Soldevila, U.; Sanchez, J.; Taylor Vara, R.J.; Torro Pastor, E.; Valero, A.; Valiente Moreno, E.; Valls Ferrer, J.A.; Varriale, L.; Villaplana Perez, M.; Vincent, M.; Vos, M.; Wandall-Christensen, K.; Zakareishvili, T. |
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Title |
Search for the production of a Higgs boson in association with a single top quark in 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 |
10 |
Issue |
10 |
Pages |
093 - 70pp |
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Keywords |
Hadron-Hadron Scattering |
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Abstract |
A search for the production of a Higgs boson in association with a single top quark, tH, is presented. The analysis uses proton-proton collision data corresponding to an integrated luminosity of 140 fb(-1) at a centre-of-mass energy of 13TeV, collected by the ATLAS detector at the LHC. The search targets Higgs-boson decays into b (b) over bar, WW*, ZZ*, and tau tau, accompanied by an isolated lepton (electron or muon) from the top-quark decay. Multivariate techniques are employed to enhance the separation between signal and background processes. The observed signal strength, mu(tH), defined as the ratio between the measured cross-section and the predicted Standard Model value, is mu(tH) = 8.1 +/- 2.6 (stat.) +/- 2.0 (syst.). The significance of the observed (expected) signal above the background-only expectation is 2.8 (0.4) standard deviations. The corresponding observed (expected) upper limit at the 95% confidence level on the tH cross-section is found to be 13.9 (6.1) times the value predicted by the Standard Model. An interpretation with an inverted sign of the top-quark Yukawa coupling is performed, and the signal strength and corresponding limit are reported. |
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Address |
[Desai, A. M.; Fewell, M. P.; Gallagher, J.; Grant, C. M.; Green, M. J.; Jackson, P.; Kong, A. X. Y.; Kull, J.; Pandya, H. D.; Purnell, H. I.; 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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English |
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Notes |
WOS:001638776600001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
7052 |
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