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dc.contributor.authorCMS Collaboration
Adair, A.
Akgun, B.
Ecklund, K.M.
Geurts, F.J.M.
Li, W.
Michlin, B.
Padley, B.P.
Redjimi, R.
Roberts, J.
Zabel, J.
dc.date.accessioned 2015-04-21T13:30:25Z
dc.date.available 2015-04-21T13:30:25Z
dc.date.issued 2015
dc.identifier.citation CMS Collaboration, Adair, A., Akgun, B., et al.. "Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at √s=8  TeV." Physical Review D, 91, (2015) American Physical Society: 12007. http://dx.doi.org/10.1103/PhysRevD.91.012007.
dc.identifier.urihttps://hdl.handle.net/1911/79624
dc.description.abstract A search is performed for long-lived massive neutral particles decaying to quark-antiquark pairs. The experimental signature is a distinctive topology of a pair of jets, originating at a secondary vertex. Events were collected with the CMS detector at the CERN LHC in proton-proton collisions at a center-of-mass energy of 8 TeV. The data analyzed correspond to an integrated luminosity of 18.5  fb−1. No significant excess is observed above standard model expectations. Upper limits at 95% confidence level are set on the production cross section of a heavy neutral scalar particle, H, in the mass range of 200 to 1000 GeV, decaying promptly into a pair of long-lived neutral X particles in the mass range of 50 to 350 GeV, each in turn decaying into a quark-antiquark pair. For X with mean proper decay lengths of 0.4 to 200 cm, the upper limits are typically 0.5–200  fb. The results are also interpreted in the context of an R-parity-violating supersymmetric model with long-lived neutralinos decaying into a quark-antiquark pair and a muon. For pair production of squarks that promptly decay to neutralinos with mean proper decay lengths of 2–40  cm, the upper limits on the cross section are typically 0.5–3  fb. The above limits are the most stringent on these channels to date.
dc.language.iso eng
dc.publisher American Physical Society
dc.rights This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/
dc.title Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at √s=8  TeV
dc.type Journal article
dc.citation.journalTitle Physical Review D
dc.citation.volumeNumber 91
dc.type.dcmi Text
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevD.91.012007
dc.type.publication publisher version
dc.citation.firstpage 12007


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This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
Except where otherwise noted, this item's license is described as This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.