Search for dark matter in events with a leptoquark and missing transverse momentum in proton-proton collisions at 13 TeVстатья
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Дата последнего поиска статьи во внешних источниках: 24 июля 2019 г.
Аннотация:A search is presented for dark matter in proton-proton collisions at a center-of-mass energy of s√= 13 TeV using events with at least one high transverse momentum (pT) muon, at least one high-pT jet, and large missing transverse momentum. The data were collected with the CMS detector at the CERN LHC in 2016 and 2017, and correspond to an integrated luminosity of 77.4 fb−1. In the examined scenario, a pair of scalar leptoquarks is assumed to be produced. One leptoquark decays to a muon and a jet while the other decays to dark matter and low-pT standard model particles. The signature for signal events would be significant missing transverse momentum from the dark matter in conjunction with a peak at the leptoquark mass in the invariant mass distribution of the highest pT muon and jet. The data are observed to be consistent with the background predicted by the standard model. For a first benchmark scenario, dark matter masses up to 430 GeV are excluded for leptoquark masses MLQ≈ 1000 GeV, and up to 300 GeV for MLQ≈ 1170 GeV. For a second benchmark scenario, dark matter masses up to around 480 GeV are excluded for MLQ≈ 1100 GeV.