Search for heavy neutral leptons in decays of W bosons using leptonic and semi-leptonic displaced vertices in root s=13 TeV pp collisions with the ATLAS detector

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F25%3A00388208" target="_blank" >RIV/68407700:21220/25:00388208 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21240/25:00388208 RIV/68407700:21340/25:00388208 RIV/68407700:21670/25:00388208
Result on the web
<a href="https://doi.org/10.1007/JHEP07(2025)196" target="_blank" >https://doi.org/10.1007/JHEP07(2025)196</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/JHEP07(2025)196" target="_blank" >10.1007/JHEP07(2025)196</a>

Result language
angličtina
Original language name
Search for heavy neutral leptons in decays of W bosons using leptonic and semi-leptonic displaced vertices in root s=13 TeV pp collisions with the ATLAS detector
Original language 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 root 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.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10303 - Particles and field physics

Project
<a href="/en/project/EH22_008%2F0004632" target="_blank" >EH22_008/0004632: Fundamental constituents of matter through frontier technologies</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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