Repository logo

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

Published version

Repository DOI

Change log


Aad, G 
Abbott, B 
Abbott, DC 
Abed Abud, A 
Abeling, K 


jats:titleAjats:scbstract</jats:sc> </jats:title>jats:pThis paper presents a search for hypothetical massive, charged, long-lived particles with the ATLAS detector at the LHC using an integrated luminosity of 139 fbjats:supjats:italic−</jats:italic>1</jats:sup> of proton–proton collisions at jats:inline-formulajats:alternativesjats:tex-math$$ \sqrt{s} $$</jats:tex-math><mml:math xmlns:mml=""> mml:msqrt mml:mis</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, djats:italicE/</jats:italic>djats:italicx</jats:italic>. Trajectories reconstructed solely by the inner tracking system and a djats:italicE/</jats:italic>djats:italicx</jats:italic> measurement in the pixel detector layers provide sensitivity to particles with lifetimes down to jats:inline-formulajats:alternativesjats:tex-math$$ \mathcal{O} $$</jats:tex-math><mml:math xmlns:mml=""> mml:miO</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:italicR</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>



Beyond Standard Model, Exotics, Hadron-Hadron Scattering, Supersymmetry

Journal Title

Journal of High Energy Physics

Conference Name

Journal ISSN


Volume Title



Springer Science and Business Media LLC