Search for heavy, long-lived, charged particles with large ionisation energy loss in <i>pp</i> collisions at √s=13 TeV using the ATLAS experiment and the full Run 2 dataset



Aad, G, Abbott, B, Abbott, DC, Abud, A Abed, Abeling, K, Abhayasinghe, DK, Abidi, SH, Aboulhorma, A, Abramowicz, H, Abreu, H
et al (show 2845 more authors) (2023) Search for heavy, long-lived, charged particles with large ionisation energy loss in <i>pp</i> collisions at √s=13 TeV using the ATLAS experiment and the full Run 2 dataset. JOURNAL OF HIGH ENERGY PHYSICS, 2023 (6). 158-.

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Abstract

<jats:title>A<jats:sc>bstract</jats:sc> </jats:title><jats:p>This paper presents a search for hypothetical massive, charged, long-lived particles with the ATLAS detector at the LHC using an integrated luminosity of 139 fb<jats:sup><jats:italic>−</jats:italic>1</jats:sup> of proton–proton collisions at <jats:inline-formula><jats:alternatives><jats:tex-math>$$ \sqrt{s} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> </mml:math></jats:alternatives></jats:inline-formula> = 13 TeV. These particles are expected to move significantly slower than the speed of light and should be identifiable by their high transverse momenta and anomalously large specific ionisation losses, d<jats:italic>E/</jats:italic>d<jats:italic>x</jats:italic>. Trajectories reconstructed solely by the inner tracking system and a d<jats:italic>E/</jats:italic>d<jats:italic>x</jats:italic> measurement in the pixel detector layers provide sensitivity to particles with lifetimes down to <jats:inline-formula><jats:alternatives><jats:tex-math>$$ \mathcal{O} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>O</mml:mi> </mml:math></jats:alternatives></jats:inline-formula>(1) ns with a mass, measured using the Bethe–Bloch relation, ranging from 100 GeV to 3 TeV. Interpretations for pair-production of <jats:italic>R</jats:italic>-hadrons, charginos and staus in scenarios of supersymmetry compatible with these particles being long-lived are presented, with mass limits extending considerably beyond those from previous searches in broad ranges of lifetime.</jats:p>

Item Type: Article
Uncontrolled Keywords: Beyond Standard Model, Exotics, Hadron-Hadron Scattering, Supersymmetry
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 25 Jul 2023 14:25
Last Modified: 18 Mar 2024 03:57
DOI: 10.1007/JHEP06(2023)158
Open Access URL: https://link.springer.com/article/10.1007/JHEP06(2...
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3171906