The observation is presented of the Z boson rare decay to a ψ meson and two oppositely charged same-flavor leptons, l+l−, where ψ represents the sum of J/ψ and ψ(2S) → J/ψ X, and l = μ, e, is presented. The data sample of proton-proton collisions at a center-of-mass energy of 13 TeV corresponds to an integrated luminosity of 35.9fb−1 accumulated by the CMS experiment at the CERN LHC. The...
A search for a new heavy particle decaying to a pair of vector bosons (WW or WZ) is presented using data from the CMS detector corresponding to an integrated luminosity of 35.9/fb collected in proton-proton collisions at a centre-of-mass energy of 13 TeV in 2016. One of the bosons is required to be a W boson decaying to eν or μν, while the other boson is required to be reconstructed as a...
In the framework of the (B−L) Supersymmetric Standard Model (BLSSM), we assess the ability of ground and space based experiments to establish the nature of its prevalent Dark Matter (DM) candidate, the sneutrino, which could either be CP-even or -odd. Firstly, by benchmarking this theory construct against the results obtained by the Planck spacecraft, we extract the portions of the BLSSM...
The cosmic-ray flux of antiprotons is measured with unprecedented accuracy by the space-borne particle spectrometers AMS-02. Its interpretation requires correct description of the dominant production process for antiprotons in our Galaxy, namely, the interaction of cosmic-ray proton and helium with the interstellar medium. In the light of new cross section measurements by the NA61 experiment...
