Charged Higgs bosons produced either in top-quark decays or in association with a top quark, subsequently decaying via 𝐻± →𝜏±⁢𝜈𝜏, are searched for in 140  fb−1 of proton-proton collision data at √𝑠 =13  TeV recorded with the ATLAS detector. Depending on whether the top quark is produced together with the 𝐻± decays hadronically or semileptonically, the search targets 𝜏 +jets or 𝜏 +lepton final states, in both cases with a 𝜏-lepton decaying into a neutrino and hadrons. No significant excess over the Standard Model background expectation is observed. For the mass range of 80 ≤𝑚𝐻± ≤3000  GeV, upper limits at 95% confidence level are set on the production cross section of the charged Higgs boson times the branching fraction ℬ⁡(𝐻± →𝜏±⁢𝜈𝜏) in the range 4.5 pb–0.4 fb. In the mass range 80–160 GeV, assuming the Standard Model cross section for 𝑡⁢ ¯ 𝑡 production, this corresponds to upper limits between 0.27% and 0.02% on ℬ⁡(𝑡 →𝑏⁢𝐻±) ×ℬ⁡(𝐻± →𝜏±⁢𝜈𝜏).

Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N. j., et al. (2025). Search for charged Higgs bosons produced in top-quark decays or in association with top quarks and decaying via 𝐻± →𝜏±⁢𝜈𝜏 in 13 TeV 𝑝⁢𝑝 collisions with the ATLAS detector. PHYSICAL REVIEW D, 111(7), 072006-1-072006-31 [10.1103/physrevd.111.072006].

Search for charged Higgs bosons produced in top-quark decays or in association with top quarks and decaying via 𝐻± →𝜏±⁢𝜈𝜏 in 13 TeV 𝑝⁢𝑝 collisions with the ATLAS detector

Alfonsi, F.;Ballabene, E.;Bellagamba, L.;Bianco, G.;Boscherini, D.;Bruni, A.;Carratta, G.;Corchia, F.  A.;Cremonini, D.;De Castro, S.;Fabbri, F.;Fabbri, L.;Franchini, M.;Gabrielli, A.;Giacobbe, B.;Lasagni Manghi, F.;Levrini, G.;Nechaeva, S.;Polini, A.;Rinaldi, L.;Romano, M.;Sanzani, E.;Sbarra, C.;Sbrizzi, A.;Semprini-Cesari, N.;Sioli, M.;Todome, K.;Valentinetti, S.;Villa, M.;Vittori, C.;Vivarelli, I.;Zoccoli, A.;
2025

Abstract

Charged Higgs bosons produced either in top-quark decays or in association with a top quark, subsequently decaying via 𝐻± →𝜏±⁢𝜈𝜏, are searched for in 140  fb−1 of proton-proton collision data at √𝑠 =13  TeV recorded with the ATLAS detector. Depending on whether the top quark is produced together with the 𝐻± decays hadronically or semileptonically, the search targets 𝜏 +jets or 𝜏 +lepton final states, in both cases with a 𝜏-lepton decaying into a neutrino and hadrons. No significant excess over the Standard Model background expectation is observed. For the mass range of 80 ≤𝑚𝐻± ≤3000  GeV, upper limits at 95% confidence level are set on the production cross section of the charged Higgs boson times the branching fraction ℬ⁡(𝐻± →𝜏±⁢𝜈𝜏) in the range 4.5 pb–0.4 fb. In the mass range 80–160 GeV, assuming the Standard Model cross section for 𝑡⁢ ¯ 𝑡 production, this corresponds to upper limits between 0.27% and 0.02% on ℬ⁡(𝑡 →𝑏⁢𝐻±) ×ℬ⁡(𝐻± →𝜏±⁢𝜈𝜏).
2025
Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N. j., et al. (2025). Search for charged Higgs bosons produced in top-quark decays or in association with top quarks and decaying via ��± →��±⁢���� in 13 TeV ��⁢�� collisions with the ATLAS detector. PHYSICAL REVIEW D, 111(7), 072006-1-072006-31 [10.1103/physrevd.111.072006].
Aad, G.; Aakvaag, E.; Abbott, B.; Abdelhameed, S.; Abeling, K.; Abicht, N.  j.; Abidi, S.  h.; Aboelela, M.; Aboulhorma, A.; Abramowicz, H.; Abulaiti,...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1045526
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