B. Checcucci

TL;DR: The Compact Muon Solenoid (CMS) detector at the Large Hadron Collider (LHC) at CERN as mentioned in this paper was designed to study proton-proton (and lead-lead) collisions at a centre-of-mass energy of 14 TeV (5.5 TeV nucleon-nucleon) and at luminosities up to 10(34)cm(-2)s(-1)

TL;DR: In this article, the upper limits of the | U e 4 | 2 matrix were established at the level of 10 − 9 over most of the accessible heavy neutral lepton mass range with the assumption that the lifetime exceeds 50 ns.

TL;DR: In this article, upper limits at the 10 − 7 to 10 − 6 level were established on the elements of the extended neutrino mixing matrix for heavy neutral lepton mass in the ranges 170 −448 MeV/ c 2 and 250 −373 MeV / c 2, respectively.

TL;DR: In this paper, the results of a search for π$^{0}$ decays to a photon and an invisible massive dark photon at the NA62 experiment at the CERN SPS are reported.

TL;DR: The NA62 experiment at the CERN SPS reported the first search for K + → π + ν ν ¯ using the decay-in-flight technique, based on a sample of 1.21 × 10 11 K + decays collected in 2016 as mentioned in this paper.