Search for heavy right-handed Majorana neutrinos in the decay of top quarks produced in proton-proton collisions at √s=13 TeV with the ATLAS detector
A search for heavy right-handed Majorana neutrinos is performed with the ATLAS detector at the CERN Large Hadron Collider, using the 140 fb−1 of proton-proton collision data at √𝑠 =13 TeV collected during Run 2. This search targets 𝑡¯𝑡 production, in which both top quarks decay into a bottom quark...
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
2 December 2024
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| In: |
Physical review
Year: 2024, Volume: 110, Issue: 11, Pages: 1-33 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.110.112004 |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevD.110.112004 Verlag, kostenfrei, Volltext: https://journals.aps.org/prd/abstract/10.1103/PhysRevD.110.112004 
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| Author Notes: | G. Aad et al., (ATLAS Collaboration) |
MARC
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| 245 | 1 | 0 | |a Search for heavy right-handed Majorana neutrinos in the decay of top quarks produced in proton-proton collisions at √s=13 TeV with the ATLAS detector |c G. Aad et al., (ATLAS Collaboration) |
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| 246 | 3 | 3 | |a Search for heavy right-handed Majorana neutrinos in the decay of top quarks produced in proton-proton collisions at square root s =13 TeV with the ATLAS detector |
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| 500 | |a ATLAS Collaboration: G. Aad, A. Ackermann, L.M. Baltes, F. Bartels, F. Del Rio, S.J. Dittmeier, M. Dunford, S. Franchino, T. Junkermann, T. Mkrtchyan, P.S. Ott, D.F. Rassloff, L. Sanfilippo, C. Sauer, A. Schoening, H.-C. Schultz-Coulon, V. Sothilingam, R. Stamen, P. Starovoitov, L. Vigani, S. M. Weber, M. Wessels, J. Zinsser [und 2909 weitere] | ||
| 500 | |a Gesehen am 03.07.2025 | ||
| 520 | |a A search for heavy right-handed Majorana neutrinos is performed with the ATLAS detector at the CERN Large Hadron Collider, using the 140 fb−1 of proton-proton collision data at √ =13 TeV collected during Run 2. This search targets ¯ production, in which both top quarks decay into a bottom quark and a boson, where one of the bosons decays hadronically and the other decays into an electron or muon and a heavy neutral lepton. The heavy neutral lepton is identified through a decay into an electron or muon and another boson, resulting in a pair of same-charge same-flavor leptons in the final state. This paper presents the first search for heavy neutral leptons in the mass range of 15-75 GeV using ¯ events. No significant excess is observed over the background expectation, and upper limits are placed on the signal cross sections. Assuming a benchmark scenario of the phenomenological type-I seesaw model, these cross section limits are then translated into upper limits on the mixing parameters of the heavy Majorana neutrino with Standard Model neutrinos. | ||
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