000001629 001__ 1629
000001629 005__ 20190820104806.0
000001629 037__ $$aBELLE2-TALK-CONF-2019-102
000001629 041__ $$aeng
000001629 088__ $$aBELLE2-TALK-DRAFT-2019-104
000001629 100__ $$aPetar Rados
000001629 245__ $$aSearch for Heavy Neutral Leptons at Belle and Belle II
000001629 260__ $$aRencontres du Vietnam - 3 Neutrinos and beyond$$c2019-08-08
000001629 300__ $$amult. p
000001629 500__ $$a25 + 5 min
000001629 520__ $$aA mechanism beyond the Standard Model is needed to explain neutrino masses. One possibility is the addition of a heavy right-handed neutrino, which may also have a Majorana mass, that can naturally explain the smallness of the observed neutrino masses via the so-called "see saw" mechanism. In this talk I present a search performed by Belle for a heavy neutrino produced in B-meson decays. I also provide an overview of the prospects for constraining the tau neutrino mixing at both Belle and Belle II.
000001629 6531_ $$aheavy neutrino
000001629 6531_ $$aheavy neutral lepton
000001629 6531_ $$aBelle
000001629 6531_ $$aBelle II 
000001629 8560_ $$fdoris.yangsoo.kim@desy.de
000001629 8564_ $$uhttps://docs.belle2.org/record/1629/files/BELLE2-TALK-CONF-2019-102.pdf