Bondarenko, KyryloBoyarsky, AlexeyKlaric, JurajMikulenko, OleksiiRuchayskiy, OlegSyvolap, VsevolodTimiryasov, Inar2021-08-142021-08-142021-08-142021-07-2610.1007/JHEP07(2021)193https://infoscience.epfl.ch/handle/20.500.14299/180672WOS:000679266700001The extension of the Standard Model with two gauge-singlet Majorana fermions can simultaneously explain two beyond-the-Standard-model phenomena: neutrino masses and oscillations, as well as the origin of the matter-antimatter asymmetry in the Universe. The parameters of such a model are constrained by the neutrino oscillation data, direct accelerator searches, big bang nucleosynthesis, and requirement of successful baryogenesis. We show that their combination still leaves an allowed region in the parameter space below the kaon mass. This region can be probed by the further searches of NA62, DUNE, or SHiP experiments.Physics, Particles & FieldsPhysicsbeyond standard modelcosmology of theories beyond the smneutrino physicsprocesses involving neutrinosdouble-beta decaymajorana neutrinossterile neutrinocp violationdark-mattergeneral-theorybaryogenesisboundssearchAn allowed window for heavy neutral leptons below the kaon masstext::journal::journal article::research article