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| Titel: | Search for flavour-changing neutral current interactions of the top quark and the Higgs boson in events with a pair of τ-leptons in pp collisions at √s=13 TeV with the ATLAS detector |
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| Mitwirkende: | Aad, Georges [VerfasserIn]  |
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| | Baltes, Lisa Marie [VerfasserIn] |
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| | Bartels, Falk [VerfasserIn] |
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| | Castillo, Florencia Luciana [VerfasserIn] |
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| | Czurylo, Marta [VerfasserIn] |
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| | Rio, Fernando del [VerfasserIn] |
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| | Dittmeier, Sebastian [VerfasserIn] |
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| | Dunford, Monica [VerfasserIn] |
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| | Franchino, Silvia [VerfasserIn] |
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| | Klassen, Martin [VerfasserIn] |
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| | Krishnan, Anjali [VerfasserIn] |
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| | Mkrtchyan, Tigran [VerfasserIn] |
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| | Ott, Philipp [VerfasserIn] |
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| | Rassloff, Damir Fabrice [VerfasserIn] |
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| | Rodriguez Bosca, Sergi [VerfasserIn] |
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| | Sauer, Christof [VerfasserIn] |
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| | Schöning, André [VerfasserIn] |
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| | Schultz-Coulon, Hans-Christian [VerfasserIn] |
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| | Sothilingam, Varsiha [VerfasserIn] |
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| | Stamen, Rainer [VerfasserIn] |
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| | Starovoitov, Pavel [VerfasserIn] |
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| | Vigani, Luigi [VerfasserIn] |
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| | Weber, Sebastian [VerfasserIn] |
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| | Wessels, Martin [VerfasserIn] |
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| | Yue, Xiaoguang [VerfasserIn] |
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| | Zinßer, Joachim [VerfasserIn] |
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| Körperschaft: | ATLAS Collaboration [VerfasserIn] |
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| Verf.angabe: | the ATLAS Collaboration: G. Aad, F. Bartels, M.M. Czurylo, S.J. Dittmeier, M. Dunford, S. Franchino, M. Klassen, A. Krishnan, T. Mkrtchyan, D.F. Rassloff, S. Rodriguez Bosca, C. Sauer, A. Schoening, H.-C. Schultz-Coulon, R. Stamen, P. Starovoitov, L. Vigani, S.M. Weber, M. Wessels, X. Yue, J. Zinßer ... [und 2873 weitere Personen] |
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| E-Jahr: | 2023 |
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| Jahr: | June 23, 2023 |
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| Umfang: | 57 S. |
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| Fussnoten: | Gesehen am 29.04.2024 |
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| Titel Quelle: | Enthalten in: Journal of high energy physics |
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| Ort Quelle: | Berlin : Springer, 1997 |
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| Jahr Quelle: | 2023 |
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| Band/Heft Quelle: | (2023), 6, Artikel-ID 155, Seite 1-57 |
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| ISSN Quelle: | 1029-8479 |
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| Abstract: | Abstract: A search for flavour-changing neutral current (FCNC) tqH interactions involving a top quark, another up-type quark (q = u, c), and a Standard Model (SM) Higgs boson decaying into a τ -lepton pair (H → τ +τ −) is presented. The search is based on a dataset of pp collisions at √s = 13 TeV that corresponds to an integrated luminosity of 139 fb−1 recorded with the ATLAS detector at the Large Hadron Collider. Two processes are considered: single top quark FCNC production in association with a Higgs boson (pp → tH), and top quark pair production in which one of top quarks decays into W b and the other decays into qH through the FCNC interactions. The search selects events with two hadronically decaying τ -lepton candidates (τhad) or at least one τhad with an additional lepton (e, μ), as well as multiple jets. Event kinematics is used to separate signal from the background through a multivariate discriminant. A slight excess of data is observed with a significance of 2.3σ above the expected SM background, and 95% CL upper limits on the t → qH branching ratios are derived. The observed (expected) 95% CL upper limits set on the t → cH and t → uH branching ratios are 9.4 × 10−4 (4.8+2.2−1.4 × 10−4) and 6.9 × 10−4 (3.5+1.5−1.0 × 10−4), respectively. The corresponding combined observed (expected) upper limits on the dimension-6 operator Wilson coefficients in the effective tqH couplings are Ccφ < 1.35 (0.97) and Cuφ < 1.16 (0.82). |
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| DOI: | doi:10.1007/JHEP06(2023)155 |
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| URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
kostenfrei: Volltext: https://doi.org/10.1007/JHEP06(2023)155 |
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| | kostenfrei: Volltext: https://link.springer.com/article/10.1007/JHEP06(2023)155 |
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| | DOI: https://doi.org/10.1007/JHEP06(2023)155 |
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| Datenträger: | Online-Ressource |
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| Sprache: | eng |
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| Sach-SW: | Flavour Changing Neutral Currents |
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| | Hadron-Hadron Scattering |
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| | Higgs Physics |
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| | Top Physics |
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| K10plus-PPN: | 1887332200 |
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| Verknüpfungen: | → Zeitschrift |
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Search for flavour-changing neutral current interactions of the top quark and the Higgs boson in events with a pair of τ-leptons in pp collisions at √s=13 TeV with the ATLAS detector / Aad, Georges [VerfasserIn]; June 23, 2023 (Online-Ressource)
