Search for long-lived charginos based on a disappearing-track signature using 136 fb- of pp collisions at [square root]s : = 13 TeV with the ATLAS detector

Abstract: A search for long-lived charginos produced either directly or in the cascade decay of heavy prompt gluino states is presented. The search is based on proton–proton collision data collected at a centre-of-mass energy of s√ = 13 TeV between 2015 and 2018 with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 136 fb−1. Long-lived charginos are characterised by a distinct signature of a short and then disappearing track, and are reconstructed using at least four measurements in the ATLAS pixel detector, with no subsequent measurements in the silicon-microstrip tracking volume nor any associated energy deposits in the calorimeter. The final state is complemented by a large missing transverse-momentum requirement for triggering purposes and at least one high-transverse-momentum jet. No excess above the expected backgrounds is observed. Exclusion limits are set at 95% confidence level on the masses of the chargino and gluino for different chargino lifetimes. Chargino masses up to 660 (210) GeV are excluded in scenarios where the chargino is a pure wino (higgsino). For charginos produced during the cascade decay of a heavy gluino, gluinos with masses below 2.1 TeV are excluded for a chargino mass of 300 GeV and a lifetime of 0.2 ns

Object Details

• Alternative title: 13 TeV with the ATLAS detector
• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch
• Notes: The European physical journal. C, Particles and fields. - 82, 7 (2022) , 606, ISSN: 1434-6052

Contributors, Places and Time

• Event: Veröffentlichung
• (where): Freiburg
• (who): Universität
• (when): 2023
• Creator: ATLAS Collaboration CERN, [Study Group] ; Argyropoulos, Spyridon ; Becherer, Fabian ; Gargiulo, Simona ; Guth, Manuel ; Heidegger, Constantin ; Heidegger, Kim K. ; Herten, Gregor ; Hohn, David ; Hönig, Jan Cedric ; Jakobs, Karl ; Jenni, Peter ; Jiggins, Stephen ; Klapdor-Kleingrothaus, Thorwald ; Knue, Andrea ; Köneke, Karsten ; Kuprash, Oleg ; Landgraf, Ulrich ; Lang, Valerie ; Lösle, Alena ; Magerl, Veronika ; Moskalets, Tetiana ; Parzefall, Ulrich ; Plesanovs, Vladislavs ; Rodríguez Rodríguez, Arturo ; Roland, Benoit ; Rottler, Benjamin ; Rühr, Frederik ; Rúriková, Zuzana ; Sammel, Dirk ; Sauerburger, Frank ; Schleicher, Katharina E. ; Scholer, Patrick ; Schumacher, Markus ; Solomon, Shalu ; Sperlich, Dennis ; Weiser, Christian ; Wiik-Fuchs, Liv ; Winter, Benedict T. ; Zanzi, Daniele ; Zimmermann, Stephanie ; Heinemann, Beate ; et al
• Contributor: Experimentelle Teilchenphysik, Abt. Prof. Heinemann ; Experimentelle Teilchenphysik, Abt. Prof. Dr. Gregor Herten ; Experimentelle Teilchenphysik, Abt. Prof. Karl Jakobs ; Experimentelle Teilchenphysik, Abt. Prof. Schumacher

Further information

• DOI: 10.1140/epjc/s10052-022-10489-5
• URN: urn:nbn:de:bsz:25-freidok-2338382
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 14.08.2025, 10:52 AM CEST