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dc.contributor.authorKhachatryan, Vardan
dc.contributor.authorSirunyan, A. M.
dc.contributor.authorTumasyan, A. R.
dc.contributor.authorAdam, Wolfgang
dc.contributor.authorBergauer, Thomas
dc.contributor.authorBaarmand, Marc M.
dc.contributor.authorHohlmann, Marcus
dc.contributor.authorKalakhety, H.
dc.contributor.authorYumiceva, Francisco X.
dc.contributor.authorDragicevic, Marko
dc.date.accessioned2015-04-02T18:17:07Z
dc.date.available2015-04-02T18:17:07Z
dc.date.issued2015-01-20
dc.identifier.citationKhachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., . . . Woods, N. (2015). Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at s =8TeV. Physical Review D - Particles, Fields, Gravitation and Cosmology, 91(1) .en_US
dc.identifier.urihttp://hdl.handle.net/11141/522
dc.description.abstractA 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 18.5fb-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 0.5-200fb. 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 2-40cm, the upper limits on the cross section are typically 0.5-3fb. The above limits are the most stringent on these channels to date.en_US
dc.language.isoen_USen_US
dc.rightsThis published article is available in accordance with the publisher's policy. It may be subject to U.S. Copyright Law.en_US
dc.rights.urihttp://journals.aps.org/authors/transfer-of-copyright-agreementen_US
dc.titleSearch for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at s√=8  TeVen_US
dc.typeArticleen_US
dc.identifier.doi10.1103/PhysRevD.91.012007


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