K. Massri

TL;DR: NA62 as mentioned in this paper is a fixed-target experiment at the CERN SPS dedicated to measurements of rare kaon decays, such as the branching fraction of the K+ → π+ ν bar nu decay, which can bring significant insights into new physics processes when comparison is made with precise theoretical predictions.

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 authors presented the cost of the experiment and of its auxiliary systems were supported by the funding agencies of the Collaboration Institutes, particularly the F.R.S.

TL;DR: In this article , the authors summarize the relevant phenomenological models and the status of the searches in a comprehensive list of kaon and hyperon decay channels and identify new search strategies for under-explored signatures, and demonstrate that improved sensitivities from current and next-generation experiments could lead to a qualitative leap in the exploration of light dark sectors.