Extending the Limits in the Hunt for Long-lived Heavy Neutral Leptons with the ATLAS Experiment at the Large Hadron Collider at CERN

Extending the Limits in the Hunt for Long-lived Heavy Neutral Leptons with the ATLAS Experiment at the Large Hadron Collider at CERN
Author: Christian Appelt
Publisher:
Total Pages: 0
Release: 2024*
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Englische Version: A search for a long-lived, heavy neutral lepton ($\mathcal{N}$) in 139~fb$ {-1}$ of $\sqrt{s}=13$~TeV $pp$ collision data collected between 2015 and 2018 by the ATLAS detector at the Large Hadron Collider is presented. The $\mathcal{N}$ is assumed to be produced via $W \rightarrow \mathcal{N} \mu$ or $W \rightarrow \mathcal{N} e$ and decays into two charged leptons and a neutrino, forming a unique displaced vertex signature. A novel technique is used to reconstruct the $\mathcal{N}$ mass that discriminates between signal and background. No signal is observed, and limits are set on the squared mixing parameters of the $\mathcal{N}$ with the left-handed neutrino states for the $\mathcal{N}$ mass range $3$~GeV~$


Extending the Limits in the Hunt for Long-lived Heavy Neutral Leptons with the ATLAS Experiment at the Large Hadron Collider at CERN
Language: en
Pages: 0
Authors: Christian Appelt
Categories:
Type: BOOK - Published: 2024* - Publisher:

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Englische Version: A search for a long-lived, heavy neutral lepton ($\mathcal{N}$) in 139~fb$ {-1}$ of $\sqrt{s}=13$~TeV $pp$ collision data collected between 2
A Search for Displaced Leptons in the ATLAS Detector
Language: en
Pages: 146
Authors: Lesya Horyn
Categories: Science
Type: BOOK - Published: 2022-02-07 - Publisher: Springer Nature

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This thesis presents a search for long-lived particles decaying into displaced electrons and/or muons with large impact parameters. This signature provides uniq
Particle Physics Reference Library
Language: en
Pages: 1083
Authors: Christian W. Fabjan
Categories: Elementary particles (Physics).
Type: BOOK - Published: 2020 - Publisher: Springer Nature

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This second open access volume of the handbook series deals with detectors, large experimental facilities and data handling, both for accelerator and non-accele
Electroweak Interactions and Unified Theories
Language: en
Pages: 616
Authors: J. Thanh Van Tran
Categories: Dark matter (Astronomy)
Type: BOOK - Published: 1988 - Publisher: Atlantica Séguier Frontières

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Search for Type-III Seesaw Heavy Leptons in Leptonic Final States in Pp Collisions at [square Root]s
Language: en
Pages: 0
Authors: [Study Group] ATLAS Collaboration CERN
Categories:
Type: BOOK - Published: 2022 - Publisher:

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Abstract: A search for the pair production of heavy leptons as predicted by the type-III seesaw mechanism is presented. The search uses proton-proton collision