Search for electroweak production of charginos and neutralinos in multilepton final states in proton-proton collisions at $$ \sqrt{s}=13 $$ TeV

Abstract

Results are presented from a search for the direct electroweak production of charginos and neutralinos in signatures with either two or more leptons (electrons or muons) of the same electric charge, or with three or more leptons, which can include up to two hadronically decaying tau leptons. The results are based on a sample of proton-proton collision data collected at $$ \sqrt{s}=13 $$ s = 13 TeV, recorded with the CMS detector at the LHC, corresponding to an integrated luminosity of 35.9 fb−1. The observed event yields are consistent with the expectations based on the standard model. The results are interpreted in simplified models of supersymmetry describing various scenarios for the production and decay of charginos and neutralinos. Depending on the model parameters chosen, mass values between 180 GeV and 1150 GeV are excluded at 95% CL. These results significantly extend the parameter space probed for these particles in searches at the LHC. In addition, results are presented in a form suitable for alternative theoretical interpretations.

96 GeV diphoton excess in seesaw extensions of the natural NMSSM

“…, we calculate the R value of the signal by the analysis of CMS collaboration with 35.9 fb −1 data[81] 8 , like what we did in[35]. We find R = 0.68 given Br(χ 0 2…”

Exotic lepton-flavor violating Higgs decays

“…We consider this specific search as it contains bins with no missing energy requirement, arbitrarily low S T , and fairly soft cuts on lepton p T . The overwhelming majority of available multi-lepton searches fail to satisfy one or more of these conditions [69][70][71][72][73]. There are also searches for a Higgs decaying into four leptons via two pseudoscalars performed at the Tevatron [74] and the lhc [75][76][77].…”

Muon g − 2 vs LHC Run 2 in supersymmetric models

“…The LHC Run 2 results are reported in Refs. [67,69,70]. The leading constraint is given by the ATLAS collaboration with dtL = 139 fb −1 , where the 1 bb + E T signature is studied with Br( χ 0 2 → h χ 0 1 ) = Br( χ ± 1 → W ± χ 0 1 ) = 1 [67].…”

“…The latest bounds with dtL = 36 fb −1 are provided in Refs. [69,72], where a simplified model with branching ratios…”