TY  - JOUR
AU  - Fernandez-Martinez, E.
AU  - Gonzalez-Lopez, M.
AU  - Hernandez-Garcia, J.
AU  - Hostert, M.
AU  - Lopez-Pavon, J.
PY  - 2023
DA  - 2023//
TI  - Effective portals to heavy neutral leptons
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 001
EP  - 45pp
VL  - 09
IS  - 9
PB  - Springer
KW  - Neutrino Interactions
KW  - Non-Standard Neutrino Properties
KW  - Sterile or Heavy Neutrinos
AB  - The existence of right-handed neutrinos, or heavy neutral leptons (HNLs), is strongly motivated by the observation of neutrino masses and mixing. The mass of these new particles could lie below the electroweak scale, making them accessible to lowenergy laboratory experiments. Additional new physics at high energies can mediate new interactions between the Standard Model particles and HNLs, and is most conveniently parametrized by the neutrino Standard Model Effective Field Theory, or nu SMEFT for short. In this work, we consider the dimension six nu SMEFT operators involving one HNL field in the mass range of O(1) MeV < MN < O(100) GeV. By recasting existing experimental limits on the production and decay of new light particles, we constrain the Wilson coefficients and new physics scale of each operator as a function of the HNL mass.
SN  - 1029-8479
UR  - https://arxiv.org/abs/2304.06772
UR  - https://doi.org/10.1007/JHEP09(2023)001
DO  - 10.1007/JHEP09(2023)001
LA  - English
N1  - WOS:001067715500003
ID  - Fernandez-Martinez_etal2023
ER  -