Search for low mass vector resonances decaying into quark-antiquark pairs in proton-proton collisions at root s=13 TeV

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http://hdl.handle.net/10138/234470

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The CMS Collaboration , Sirunyan , A M , Eerola , P , Kirschenmann , H , Pekkanen , J , Voutilainen , M , Havukainen , J , Heikkilä , J K , Järvinen , T , Karimäki , V , Kinnunen , R , Lampén , T , Lassila-Perini , K , Laurila , S , Lehti , S , Lindén , T , Luukka , P , Siikonen , H , Tuominen , E , Tuominiemi , J & Tuuva , T 2018 , ' Search for low mass vector resonances decaying into quark-antiquark pairs in proton-proton collisions at root s=13 TeV ' , Journal of High Energy Physics , vol. 2018 , no. 1 , 097 . https://doi.org/10.1007/JHEP01(2018)097

Title: Search for low mass vector resonances decaying into quark-antiquark pairs in proton-proton collisions at root s=13 TeV
Author: The CMS collaboration; Sirunyan, A. M.; Eerola, P.; Kirschenmann, H.; Pekkanen, J.; Voutilainen, M.; Havukainen, J.; Heikkilä, J.K.; Järvinen, T.; Karimäki, V.; Kinnunen, R.; Lampén, T.; Lassila-Perini, K.; Laurila, S.; Lehti, S.; Lindén, T.; Luukka, P.; Siikonen, H.; Tuominen, E.; Tuominiemi, J.; Tuuva, T.
Contributor organization: Department of Physics
Helsinki Institute of Physics
Date: 2018-01-22
Language: eng
Number of pages: 41
Belongs to series: Journal of High Energy Physics
ISSN: 1029-8479
DOI: https://doi.org/10.1007/JHEP01(2018)097
URI: http://hdl.handle.net/10138/234470
Abstract: A search for narrow vector resonances decaying into quark-antiquark pairs is presented. The analysis is based on data collected in proton-proton collisions at root s = 13 TeV with the CMS detector at the LHC, corresponding to an integrated luminosity of 35.9 fb(-1). The hypothetical resonance is produced with sufficiently high transverse momentum that its decay products are merged into a single jet with two-prong substructure. A signal would be identified as a peak over a smoothly falling background in the distribution of the invariant mass of the jet, using novel jet substructure techniques. No evidence for such a resonance is observed within the mass range of 50-300 GeV. Upper limits at 95% confidence level are set on the production cross section, and presented in a mass-coupling parameter space. The limits further constrain simplified models of dark matter production involving a mediator interacting between quarks and dark matter particles through a vector or axial-vector current. In the framework of these models, the results are the most sensitive to date, extending for the first time the search region to masses below 100 GeV.
Subject: 114 Physical sciences
Jet substructure
Hadron-Hadron scattering (experiments)
Dark matter
Jets
DARK-MATTER
P(P)OVER-BAR COLLISIONS
PARTICLES
COLLIDER
COMPUTATION
DIJETS
BOSONS
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: publishedVersion


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