| Title: |
Search for heavy neutral leptons in decays of W bosons using leptonic and semi-leptonic displaced vertices in s = 13 TeV pp collisions with the ATLAS detector |
| Authors: |
Aad, G; Aakvaag, E; Abbott, B; Abdelhameed, S; Abeling, K; Abicht, NJ; Abidi, SH; Aboelela, M; Aboulhorma, A; Abramowicz, H; Abulaiti, Y; Acharya, BS; Ackermann, A; Adam Bourdarios, C; Adamczyk, L; Addepalli, SV; Addison, MJ; Adelman, J; Adiguzel, A; Adye, T; Affolder, AA; Afik, Y; Agaras, MN; Aggarwal, A; Barr, AJ; Bortoletto, D; Bruckler, TL; Chen, M; Conroy, EI; Cooper-Sarkar, AM; Dingley, T; Draguet, MA; Eberwein, GH; Frost, JA; Gallas, EJ; Grabarczyk, RP; Gwenlan, C; Haslbeck, F; Hays, CP; Hodkinson, BH; Homsak, V; Huffman, TB; Karava, K; Koch, SF; Molinatti, U; Nagai, K; Nedic, L; Nickerson, RB; Pacey, HA; Rossi, E; Ruggiero, A; Shipsey, IPJ; Sultan, DMS; Viehhauser, GHA; Weidberg, AR; Yildirim, TP |
| Publisher Information: |
Springer |
| Publication Year: |
2025 |
| Collection: |
Oxford University Research Archive (ORA) |
| Description: |
A search is performed for long-lived heavy neutral leptons (HNLs), produced through the decay of a W boson along with a muon or electron. Two channels are explored: a leptonic channel, in which the HNL decays into two leptons and a neutrino, and a semi-leptonic channel, in which the HNL decays into a lepton and a charged pion. The search is performed with 140 fb−1 of s = 13 TeV proton-proton collision data collected by ATLAS during Run 2 of the Large Hadron Collider. No excess of events is observed; Dirac-like and Majorana-like HNLs with masses below 14.5 GeV and mixing coefficients as small as 10−7 are excluded at the 95% confidence level. The results are interpreted under different assumptions on the flavour of the leptons from the HNL decays. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
https://doi.org/10.1007/jhep07(2025)196 |
| DOI: |
10.1007/jhep07(2025)196 |
| Availability: |
https://doi.org/10.1007/jhep07(2025)196; https://ora.ox.ac.uk/objects/uuid:18e80de4-cbdc-4487-af47-5fcca9b5c8dc |
| Rights: |
info:eu-repo/semantics/openAccess ; CC Attribution (CC BY) |
| Accession Number: |
edsbas.7C467305 |
| Database: |
BASE |