Search for dark matter produced in association with a leptonically decaying Z boson in proton-proton collisions at root s=13TeV

The CMS collaboration, A. M. Sirunyan, A. Tumasyan, P. Eerola, Laurent Forthomme, H. Kirschenmann, K. Österberg, M. Voutilainen, Erik Brücken, F. Garcia, J. Havukainen, V. Karimäki, Minsuk Kim, R. Kinnunen, T. Lampén, K. Lassila-Perini, S. Laurila, S. Lehti, T. Lindén, P. LuukkaH. Siikonen, E. Tuominen, J. Tuominiemi, T. Tuuva

Tutkimustuotos: ArtikkelijulkaisuArtikkelivertaisarvioitu


A search for dark matter particles is performed using events with a Z boson candidate and large missing transverse momentum. The analysis is based on proton-proton collision data at a center-of-mass energy of 13 TeV, collected by the CMS experiment at the LHC in 2016-2018, corresponding to an integrated luminosity of 137 fb(-1). The search uses the decay channels Z -> ee and Z -> mu mu. No significant excess of events is observed over the background expected from the standard model. Limits are set on dark matter particle production in the context of simplified models with vector, axial-vector, scalar, and pseudoscalar mediators, as well as on a two-Higgs-doublet model with an additional pseudoscalar mediator. In addition, limits are provided for spin-dependent and spin-independent scattering cross sections and are compared to those from direct-detection experiments. The results are also interpreted in the context ofmodels of invisible Higgs boson decays, unparticles, and large extra dimensions.

LehtiEuropean Physical Journal C. Particles and Fields
DOI - pysyväislinkit
TilaJulkaistu - 11 tammikuuta 2021
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä, vertaisarvioitu


A Publisher's Erratum to this article was published on 19 April 2021,


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