Search for dark matter in proton-proton collisions at 8 TeV with missing transverse momentum and vector boson tagged jets

V. Khachatryan , A.M Sirunyan , Agnieszka Zagoździńska

Abstract

A search is presented for an excess of events with large missing transverse momentum in association with at least one highly energetic jet, in a data sample of proton-proton collisions at a centre-of-mass energy of 8 TeV. The data correspond to an integrated luminosity of 19.7 fb−1 collected by the CMS experiment at the LHC. The results are interpreted using a set of simplified models for the production of dark matter via a scalar, pseudoscalar, vector, or axial vector mediator. Additional sensitivity is achieved by tagging events consistent with the jets originating from a hadronically decaying vector boson. This search uses jet substructure techniques to identify hadronically decaying vector bosons in both Lorentz-boosted and resolved scenarios. This analysis yields improvements of 80% in terms of excluded signal cross sections with respect to the previous CMS analysis using the same data set. No significant excess with respect to the standard model expectation is observed and limits are placed on the parameter space of the simplified models. Mediator masses between 80 and 400 GeV in the scalar and pseudoscalar models, and up to 1.5 TeV in the vector and axial vector models, are excluded.
 Collective author CMS Collaboration Author V. Khachatryan V. Khachatryan,, - , A.M Sirunyan A.M Sirunyan,, - , Agnieszka Zagoździńska (FEIT / PE) Agnieszka Zagoździńska,, - The Institute of Electronic Systems Total number of authors 2269 Journal series Journal of High Energy Physics, ISSN 1029-8479, [1126-6708] Issue year 2016 Vol 12 No 83 Pages 1-46 Publication size in sheets 2.25 Keywords in English Dark matter Hadron-Hadron scattering (experiments) DOI DOI:10.1007/JHEP12(2016)083 URL https://link.springer.com/article/10.1007/JHEP12(2016)083 Language en angielski Score (nominal) 40 Score Ministerial score = 40.0, 06-04-2017, ArticleFromJournalMinisterial score (2013-2016) = 40.0, 06-04-2017, ArticleFromJournal Publication indicators WoS Impact Factor: 2016 = 6.063 (2) - 2016=4.992 (5) Citation count*
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