A search for the decays of stopped long-lived particles at √s = 13 TeV with the ATLAS detector

ATLAS Collaboration

doi:10.1007/JHEP07(2021)173

A search for the decays of stopped long-lived particles at √s = 13 TeV with the ATLAS detector

ATLAS Collaboration

Physics and Astronomy

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Abstract

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 √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 B(g͂→qq̅χ⁰₁) = 100%, with masses of up to 1.4 TeV excluded for gluino lifetimes of 10⁻⁵ to 10³ s.

Original language	English
Article number	173
Number of pages	49
Journal	JHEP
Volume	2021
Issue number	7
DOIs	https://doi.org/10.1007/JHEP07(2021)173
Publication status	Published - 23 Jul 2021

Bibliographical note

48 pages in total, author list starting page 32, 10 figures, 8 tables, published in JHEP. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2018-15

Keywords

Hadron-Hadron scattering (experiments)
hep-ex

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10.1007/JHEP07(2021)173Licence: Creative Commons: Attribution (CC BY)

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Cite this

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title = "A search for the decays of stopped long-lived particles at √s = 13 TeV with the ATLAS detector",

abstract = "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 √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 B(g͂→qq̅χ01) = 100%, with masses of up to 1.4 TeV excluded for gluino lifetimes of 10−5 to 103 s.",

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AU - ATLAS Collaboration

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N1 - 48 pages in total, author list starting page 32, 10 figures, 8 tables, published in JHEP. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2018-15

PY - 2021/7/23

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N2 - 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 √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 B(g͂→qq̅χ01) = 100%, with masses of up to 1.4 TeV excluded for gluino lifetimes of 10−5 to 103 s.

AB - 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 √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 B(g͂→qq̅χ01) = 100%, with masses of up to 1.4 TeV excluded for gluino lifetimes of 10−5 to 103 s.

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DO - 10.1007/JHEP07(2021)173

M3 - Article

SN - 1126-6708

VL - 2021

JO - JHEP

JF - JHEP

IS - 7

M1 - 173

ER -

A search for the decays of stopped long-lived particles at √s = 13 TeV with the ATLAS detector

Abstract

Bibliographical note

Keywords

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Cite this