Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/124574
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Type: Journal article
Title: Search for metastable heavy charged particles with large ionisation energy loss in pp collisions at √ s=8 TeV using the ATLAS experiment
Other Titles: Search for metastable heavy charged particles with large ionisation energy loss in pp collisions at root s=8 TeV using the ATLAS experiment
Author: Aad, G.
Abbott, B.
Abdallah, J.
Abdinov, O.
Aben, R.
Abolins, M.
AbouZeid, O.
Abramowicz, H.
Abreu, H.
Abreu, R.
Abulaiti, Y.
Acharyaa, B.
Adamczyka, L.
Adams, D.
Adelman, J.
Adomeit, S.
Adye, T.
Affolder, A.
Agatonovic-Jovin, T.
Agricola, J.
et al.
Citation: European Physical Journal C, 2016; 75(9):407-1-407-25
Publisher: Springer
Issue Date: 2016
ISSN: 1434-6044
Statement of
Responsibility: 
G. Aad, B. Abbott, J. Abdallah, O. Abdinov ... Paul Jackson ... Martin White ... et al.
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.
Rights: © CERN for the benefit of the ATLAS collaboration 2015. This article is published with open access at Springerlink.com
RMID: 0030071621
DOI: 10.1140/epjc/s10052-015-3609-0
Appears in Collections:Physics publications

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