Please use this identifier to cite or link to this item:
https://hdl.handle.net/20.500.11851/12013
Title: | Search for Heavy Right-Handed Majorana Neutrinos in the Decay of Top Quarks Produced in Proton-Proton Collisions at √<i>s</I>=13 Tev With the Atlas Detector | Authors: | Aad, G. Aakvaag, E. Abbott, B. Abdelhameed, S. Abeling, K. Abicht, N. J. Zwalinski, L. |
Keywords: | [No Keyword Available] | Publisher: | Amer Physical Soc | Abstract: | 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 root s = 13 TeV collected during Run 2. This search targets t (t) over bar 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) over bar 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. | Description: | Nasella, Laura/0000-0002-4871-784X; Calafiura, Paolo/0000-0002-1692-1678; Abbott, Braden/0000-0002-5888-2734; Petersen, Troels/0000-0003-0221-3037; Kretzschmar, Jan/0000-0002-8515-1355; Ventura, Andrea/0000-0002-3368-3413; Carmignani, Joseph (Joe)/0000-0002-1705-1061; D'Auria, Saverio/0000-0003-3393-6318; Fernandez-Martinez, Pablo/0000-0002-7818-6971; Ragusa, Francesco/0000-0002-4064-0489; Mazzeo, Elena/0000-0002-8406-0195; Aboulhorma, Asmaa/0000-0002-9987-2292; Camplani, Alessandra/0000-0002-6386-9788; Abramowicz, Halina/0000-0001-5329-6640; Abdelhameed, Sara/0000-0002-0287-5869; Gwilliam, Carl/0000-0002-9401-5304; Stanislaus, Beojan/0000-0001-9007-7658; Haley, Joseph/0000-0002-6938-7405; Sala, Alessandro/0000-0003-0824-7326; Carbone, Antonio/0000-0002-4117-3800; Abicht, Nils Julius/0000-0001-5763-2760; Aad, Georges/0000-0002-6665-4934; Rompotis, Nikolaos/0000-0003-2577-1875 | URI: | https://doi.org/10.1103/PhysRevD.110.112004 | ISSN: | 2470-0010 2470-0029 |
Appears in Collections: | Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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