Publication Date:
2021-07-01
Description:
A search for long-lived particles, which have come to rest within the ATLAS detector, is presented. The subsequent decays of these particles can produce high-momentum jets, resulting in large out-of-time energy deposits in the ATLAS calorimeters. These de- cays are detected using data collected during periods in the LHC bunch structure when collisions are absent. The analysed dataset is composed of events from proton-proton collisions produced by the Large Hadron Collider at a centre-of-mass energy of $$ sqrt{s} $$ s = 13 TeV and recorded by the ATLAS experiment during 2017 and 2018. The dataset used for this search corresponds to a total live time of 579 hours. The results of this search are used to derive lower limits on the mass of gluino R-hadrons, assuming a branching fraction $$ mathcal{B}left(overset{sim }{g}o qoverline{q}{chi}_1^0
ight) $$ B g ~ → q q ¯ χ 1 0 = 100%, with masses of up to 1.4 TeV excluded for gluino lifetimes of 10−5 to 103 s.
Print ISSN:
1126-6708
Electronic ISSN:
1029-8479
Topics:
Physics
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