Search for tt[bar]H/A → tt[bar]tt[bar] production in the multilepton final state in proton–proton collisions at √s = 13 TeV with the ATLAS detector
A search for a new heavy scalar or pseudo-scalar Higgs boson (H/A) produced in association with a pair of top quarks, with the Higgs boson decaying into a pair of top quarks (H/A → tt[bar]) is reported. The search targets a final state with exactly two leptons with same-sign electric charges or at l...
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
2023
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| In: |
Journal of high energy physics
Year: 2023, Issue: 7, Pages: 1-53 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP07(2023)203 |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.1007/JHEP07(2023)203
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| Author Notes: | The ATLAS collaboration* |
MARC
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| 245 | 1 | 0 | |a Search for tt[bar]H/A → tt[bar]tt[bar] production in the multilepton final state in proton–proton collisions at √s = 13 TeV with the ATLAS detector |c The ATLAS collaboration* |
| 246 | 3 | 0 | |a sqrt |
| 246 | 3 | 3 | |a Search for tt[bar]H/A → tt[bar]tt[bar] production in the multilepton final state in proton–proton collisions at square root s = 13 TeV with the ATLAS detector |
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| 500 | |a Veröffentlicht: 26. Juli 2023 | ||
| 500 | |a *The ATLAS collaboration: G. Aad, L.M. Baltes, F. Bartels, F.L. Castillo, M.M. Czurylo, F. Del Rio, S.J. Dittmeier, M. Dunford, S. Franchino, M. Klassen, T. Mkrtchyan, P.S. Ott, D.F. Rassloff, S. Rodriguez Bosca, C. Sauer, A. Schoening, H.-C. Schultz-Coulon, V. Sothilingam, P. Starovoitov, L. Vigani, S.M. Weber, M. Wessels, J. Zinsser [und sehr viele weitere Personen] | ||
| 500 | |a Im Titel stehen der 2., 4. und 6. Buchstabe "t" mit einem Oberstrich | ||
| 500 | |a Im Titel steht der Buchstabe "s" unter dem Wurzelsymbol | ||
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| 520 | |a A search for a new heavy scalar or pseudo-scalar Higgs boson (H/A) produced in association with a pair of top quarks, with the Higgs boson decaying into a pair of top quarks (H/A → tt[bar]) is reported. The search targets a final state with exactly two leptons with same-sign electric charges or at least three leptons. The analysed dataset corresponds to an integrated luminosity of 139 fb−1 of proton-proton collisions collected at a centre-of-mass energy of 13 TeV with the ATLAS detector at the LHC. Two multivariate classifiers are used to separate the signal from the background. No significant excess of events over the Standard Model expectation is observed. The results are interpreted in the context of a type-II two-Higgs-doublet model. The observed (expected) upper limits at 95% confidence level on the tt[bar]H/A production cross-section times the branching ratio of H/A → tt[bar] range between 14 (10) fb and 6 (5) fb for a heavy Higgs boson with mass between 400 GeV and 1000 GeV, respectively. Assuming that only one particle, either the scalar H or the pseudo-scalar A, contributes to the tt[bar]tt[bar] final state, values of tan β below 1.2 or 0.5 are excluded for a mass of 400 GeV or 1000 GeV, respectively. These exclusion ranges increase to tan β below 1.6 or 0.6 when both particles are considered. | ||
| 650 | 4 | |a Beyond Standard Model | |
| 650 | 4 | |a Hadron-Hadron Scattering | |
| 650 | 4 | |a Top Physics | |
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