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Search for metastable heavy charged particles with large ionisation energy loss in pp collisions at √s=8 TeV using the ATLAS experiment

Aad G.
•
Abbott B.
•
Abdallah J.
altro
Zwalinski L.
2015
  • journal article

Periodico
THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS
Abstract
Many extensions of the Standard Model predict the existence of charged heavy long-lived particles, such as R-hadrons or charginos. These particles, if produced at the Large Hadron Collider, should be moving non-relativistically and are therefore identifiable through the measurement of an anomalously large specific energy loss in the ATLAS pixel detector. Measuring heavy long-lived particles through their track parameters in the vicinity of the interaction vertex provides sensitivity to metastable particles with lifetimes from 0.6 ns to 30 ns. A search for such particles with the ATLAS detector at the Large Hadron Collider is presented, based on a data sample corresponding to an integrated luminosity of 18.4 fb-1 of pp collisions at √s = 8 TeV. No significant deviation from the Standard Model background expectation is observed, and lifetime-dependent upper limits on R-hadrons and chargino production are set. Gluino R-hadrons with 10 ns lifetime and masses up to 1185 GeV are excluded at 95% confidence level, and so are charginos with 15 ns lifetime and masses up to 482 GeV. © 2015, CERN for the benefit of the ATLAS collaboration.
DOI
10.1140/epjc/s10052-015-3609-0
WOS
WOS:000363330800007
Archivio
http://hdl.handle.net/11390/1096275
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84978026007
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84974851705&partnerID=40&md5=aa560b16ca29e291cff716b77e5b0654
Diritti
metadata only access
Scopus© citazioni
29
Data di acquisizione
Jun 7, 2022
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Web of Science© citazioni
23
Data di acquisizione
Mar 28, 2024
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