Search for Heavy Neutral Leptons in Decays of W Bosons Using a Dilepton Displaced Vertex in s=13  TeV pp Collisions with the ATLAS Detector

Search for Heavy Neutral Leptons in Decays of W Bosons Using a Dilepton Displaced Vertex in s=13  TeV pp Collisions with the ATLAS Detector

A search for a long-lived, heavy neutral lepton ( N ) in 139  fb-1 of s=13  TeV pp collision data collected by the ATLAS detector at the Large Hadron Collider is reported. The N is produced via W → N μ or W → N e and decays into two charged leptons and a neutrino, forming a displaced vertex. The N m...

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Veröffentlicht in:Phys.Rev.Lett 2023, Vol.131 (6)
Hauptverfasser: Aad, G, Abbott, B, Abbott, D.C, Abed Abud, A, Abeling, K, Abhayasinghe, D.K, Abidi, S.H, Aboulhorma, A, Abramowicz, H, Abreu, H, Abulaiti, Y, Abusleme Hoffman, A.C, Acharya, B.S, Achkar, B, Adam, L, Adam Bourdarios, C, Adamczyk, L, Adamek, L, Addepalli, S.V, Adelman, J, Adiguzel, A, Adorni, S, Adye, T, Affolder, A.A, Afik, Y, Agaras, M.N, Agarwala, J, Aggarwal, A, Agheorghiesei, C, Aguilar-Saavedra, J.A, Ahmad, A, Ahmadov, F, Ahmed, W.S, Ai, X, Aielli, G, Aizenberg, I, Akbiyik, M, Åkesson, T.P.A, Akimov, A.V, Al Khoury, K, Alberghi, G.L, Albert, J, Albicocco, P, Alconada Verzini, M.J, Alderweireldt, S, Aleksa, M, Aleksandrov, I.N, Alexa, C, Alexopoulos, T, Alfonsi, A, Alfonsi, F, Alhroob, M, Ali, B, Ali, S, Aliev, M, Alimonti, G, Allaire, C, Allbrooke, B.M.M, Allport, P.P, Aloisio, A, Alonso, F, Alpigiani, C, Alunno Camelia, E, Alvarez Estevez, M, Alviggi, M.G, Amaral Coutinho, Y, Ambler, A, Ambroz, L, Amelung, C, Amidei, D, Amor dos Santos, S.P, Amoroso, S, Amos, K.R, Amrouche, C.S, Ananiev, V, Anastopoulos, C, Andari, N, Andeen, T, Anders, J.K, Andrean, S.Y, Andreazza, A, Angelidakis, S, Angerami, A, Anisenkov, A.V, Annovi, A, Antel, C, Anthony, M.T, Antipov, E, Antonelli, M, Antrim, D.J.A, Anulli, F, Aoki, M, Aparisi Pozo, J.A, Aparo, M.A, Aperio Bella, L, Appelt, C, Aranzabal, N, Araujo Ferraz, V, Arcangeletti, C, Arce, A.T.H
Format: Artikel
Sprache:eng
Schlagworte:
High Energy Physics - Experiment
Physics
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Zusammenfassung:A search for a long-lived, heavy neutral lepton ( N ) in 139  fb-1 of s=13  TeV pp collision data collected by the ATLAS detector at the Large Hadron Collider is reported. The N is produced via W → N μ or W → N e and decays into two charged leptons and a neutrino, forming a displaced vertex. The N mass is used to discriminate between signal and background. No signal is observed, and limits are set on the squared mixing parameters of the N with the left-handed neutrino states for the N mass range 3  GeV
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.131.061803