Search for massive, long-lived particles using multitrack displaced vertices or displaced lepton pairs in pp collisions at s√=8 TeV with the ATLAS detector

Barton, Adam and Beattie, Michael and Borissov, Guennadi and Bouhova-Thacker, Evelina Vassileva and Dearnaley, William and Fox, Harald and Grimm, Kathryn Ann Tschann and Henderson, Robert Charles William and Hughes, Gareth and Jones, Roger William Lewis and Kartvelishvili, Vakhtang and Long, Robin Eamonn and Love, Peter Allan and Maddocks, Harvey and Skinner, Malcolm and Smizanska, Maria and Walder, James William and Wharton, Andy (2015) Search for massive, long-lived particles using multitrack displaced vertices or displaced lepton pairs in pp collisions at s√=8  TeV with the ATLAS detector. Physical Review D, 92 (7). ISSN 1550-7998

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Abstract

Many extensions of the Standard Model posit the existence of heavy particles with long lifetimes. This article presents the results of a search for events containing at least one long-lived particle that decays at a significant distance from its production point into two leptons or into five or more charged particles. This analysis uses a data sample of proton-proton collisions at s√=8  TeV corresponding to an integrated luminosity of 20.3 fb−1 collected in 2012 by the ATLAS detector operating at the Large Hadron Collider. No events are observed in any of the signal regions, and limits are set on model parameters within supersymmetric scenarios involving R-parity violation, split supersymmetry, and gauge mediation. In some of the search channels, the trigger and search strategy are based only on the decay products of individual long-lived particles, irrespective of the rest of the event. In these cases, the provided limits can easily be reinterpreted in different scenarios.

Item Type:
Journal Article
Journal or Publication Title:
Physical Review D
ID Code:
78030
Deposited By:
Deposited On:
28 Jan 2016 10:56
Refereed?:
Yes
Published?:
Published
Last Modified:
04 Aug 2020 03:30