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Search for long-lived, weakly interacting particles that decay to displaced hadronic jets in proton-proton collisions at root s=8 TeV with the ATLAS detector
KTH, School of Engineering Sciences (SCI), Physics.
KTH, School of Engineering Sciences (SCI), Physics.
KTH, School of Engineering Sciences (SCI), Physics.ORCID iD: 0000-0002-8913-0981
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Number of Authors: 2825
2015 (English)In: Physical Review D. Particles and fields, ISSN 0556-2821, E-ISSN 1089-4918, Vol. 92, no 1, 012010Article in journal (Refereed) Published
Abstract [en]

A search for the decay of neutral, weakly interacting, long-lived particles using data collected by the ATLAS detector at the LHC is presented. This analysis uses the full data set recorded in 2012: 20.3fb-1 of proton-proton collision data at s=8TeV. The search employs techniques for reconstructing decay vertices of long-lived particles decaying to jets in the inner tracking detector and muon spectrometer. Signal events require at least two reconstructed vertices. No significant excess of events over the expected background is found, and limits as a function of proper lifetime are reported for the decay of the Higgs boson and other scalar bosons to long-lived particles and for Hidden Valley Z′ and Stealth SUSY benchmark models. The first search results for displaced decays in Z′ and Stealth SUSY models are presented. The upper bounds of the excluded proper lifetimes are the most stringent to date.

Place, publisher, year, edition, pages
2015. Vol. 92, no 1, 012010
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-172924DOI: 10.1103/PhysRevD.92.012010ISI: 000358032700004ScopusID: 2-s2.0-84939165431OAI: diva2:850650
Knut and Alice Wallenberg FoundationSwedish Research Council

QC 20150902

Available from: 2015-09-02 Created: 2015-09-02 Last updated: 2015-09-02Bibliographically approved

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Lund-Jensen, BengtMorley, Anthony K.Strandberg, Jonas
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