Artículos de revistas
Search for low mass vector resonances decaying into quark-antiquark pairs in proton-proton collisions at root s=13 TeV
Fecha
2018-01-22Registro en:
Journal Of High Energy Physics. New York: Springer, n. 1, 41 p., 2018.
1029-8479
10.1007/JHEP01(2018)097
WOS:000423442300001
WOS000423442300001.pdf
Autor
Yerevan Phys Inst
Inst Hochenergiephys
Inst Nucl Problems
Univ Antwerp
Vrije Univ Brussel
Univ Libre Bruxelles
Univ Ghent
Catholic Univ Louvain
Ctr Brasileiro Pesquisas Fis
Universidade do Estado do Rio de Janeiro (UERJ)
Universidade Estadual Paulista (Unesp)
Universidade Federal do ABC (UFABC)
Bulgaria Acad Sci
Univ Sofia
Beihang Univ
Inst High Energy Phys
Peking Univ
Univ Los Andes
Univ Split
Inst Rudjer Boskovic
Univ Cyprus
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Acad Sci Res & Technol Arab Republ Egypt
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Institución
Resumen
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.