Search for decays of stopped, long-lived particles from 7 TeV pp collisions with the ATLAS detector

The ATLAS Collaboration

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

New metastable massive particles with electric and colour charge are features of many theories beyond the Standard Model. A search is performed for long-lived gluino-based R-hadrons with the ATLAS detector at the LHC using a data sample corresponding to an integrated luminosity of 31 pb-1. We search for evidence of particles that have come to rest in the ATLAS detector and decay at some later time during the periods in the LHC bunch structure without proton-proton collisions. No significant deviations from the expected backgrounds are observed, and a cross-section limit is set. It can be interpreted as excluding gluino-based R-hadrons with masses less than 341 GeV at the 95 % C. L., for lifetimes from 10-5 to 103 seconds and a neutralino mass of 100 GeV.

Original languageEnglish (US)
Pages (from-to)1-21
Number of pages21
JournalEuropean Physical Journal C
Volume72
Issue number4
DOIs
StatePublished - Apr 2012

Fingerprint

Hadrons
hadrons
Protons
Detectors
collisions
protons
detectors
decay
electric charge
Luminance
luminosity
Color
deviation
color
life (durability)
cross sections

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Engineering (miscellaneous)

Cite this

Search for decays of stopped, long-lived particles from 7 TeV pp collisions with the ATLAS detector. / The ATLAS Collaboration.

In: European Physical Journal C, Vol. 72, No. 4, 04.2012, p. 1-21.

Research output: Contribution to journalArticle

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title = "Search for decays of stopped, long-lived particles from 7 TeV pp collisions with the ATLAS detector",
abstract = "New metastable massive particles with electric and colour charge are features of many theories beyond the Standard Model. A search is performed for long-lived gluino-based R-hadrons with the ATLAS detector at the LHC using a data sample corresponding to an integrated luminosity of 31 pb-1. We search for evidence of particles that have come to rest in the ATLAS detector and decay at some later time during the periods in the LHC bunch structure without proton-proton collisions. No significant deviations from the expected backgrounds are observed, and a cross-section limit is set. It can be interpreted as excluding gluino-based R-hadrons with masses less than 341 GeV at the 95 {\%} C. L., for lifetimes from 10-5 to 103 seconds and a neutralino mass of 100 GeV.",
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AU - Alexandre, G.

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AB - New metastable massive particles with electric and colour charge are features of many theories beyond the Standard Model. A search is performed for long-lived gluino-based R-hadrons with the ATLAS detector at the LHC using a data sample corresponding to an integrated luminosity of 31 pb-1. We search for evidence of particles that have come to rest in the ATLAS detector and decay at some later time during the periods in the LHC bunch structure without proton-proton collisions. No significant deviations from the expected backgrounds are observed, and a cross-section limit is set. It can be interpreted as excluding gluino-based R-hadrons with masses less than 341 GeV at the 95 % C. L., for lifetimes from 10-5 to 103 seconds and a neutralino mass of 100 GeV.

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