Projects per year
Abstract
production, in which both top quarks decay into a bottom quark and a 𝑊 boson, where one of the 𝑊 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 𝑊 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 𝑡¯𝑡 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
Original language | English |
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Article number | 112004 |
Pages (from-to) | 1-33 |
Number of pages | 33 |
Journal | Physical Review D |
Volume | 110 |
Issue number | 11 |
Early online date | 1 Dec 2024 |
DOIs | |
Publication status | Published - 2 Dec 2024 |
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Dive into the research topics of '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'. Together they form a unique fingerprint.-
Upgrade of the ATLAS detector at the LHC (2023-26)
Clark, P. (Principal Investigator)
Science and Technology Facilities Council
1/04/23 → 31/03/27
Project: Research
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Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
Science and Technology Facilities Council
1/04/23 → 31/03/26
Project: Research
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Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
Science and Technology Facilities Council
1/10/22 → 31/03/26
Project: Research