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Compact Muon Solenoid
LHC, CERN

CMS-PAS-EXO-19-019
Search for a narrow resonance in high-mass dilepton final states in proton-proton collisions using 140 fb1 of data at s= 13 TeV
Abstract: A search for physics beyond the standard model is presented using electron or muon pairs with high invariant mass. A data set of proton-proton collisions collected by the CMS experiment at the LHC at s= 13 TeV recorded in years 2016 to 2018 and corresponding to a total integrated luminosity of up to 140 fb1 is analyzed. No significant deviation is observed with respect to the expectation from the standard model backgrounds. Upper limits are set on the ratio of the production cross section times branching ratio of a new narrow dilepton resonance to that of the Z boson and converted into lower limits on the masses of various hypothetical particles. A ZSSM (Zψ) particle, arising in the sequential standard model (superstring-inspired model) is excluded below a mass of 5.15 (4.56) TeV at 95% confidence level.
CMS Publications
Compact Muon Solenoid
LHC, CERN