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30 May 2022 to 4 June 2022
Virtual Seoul
Asia/Seoul timezone

Constraining MeV-GeV Heavy Neutral Leptons interacting with a singlet scalar

Not scheduled
Virtual Seoul

Virtual Seoul

Poster Sterile neutrinos Poster


Guillermo Gambini (McGill University, Campinas State University (UNICAMP))


Heavy neutral leptons (HNL) are SM-gauge-singlet fermions that mix with active neutrinos. We argue that beam-dump and other limits on these mixings $U$ cannot be directly applied to HNLs that interact with a light SM-gauge-singlet scalar $s$ which mixes with the Higgs boson. We reinterpret the limits from the DELPHI, Belle, and CHARM experiments taking into account the new decay channel $N\to s\nu$ which could be dominant causing some ruled-out regions in the $m_N-U$ parameter space to reopen.

Primary authors

Guillermo Gambini (McGill University, Campinas State University (UNICAMP)) Prof. James M. Cline (McGill University)

Presentation Materials