TY  - JOUR
AU  - Barducci, D.
AU  - Bertuzzo, E.
AU  - Caputo, A.
AU  - Hernandez, P.
AU  - Mele, B.
PY  - 2021
DA  - 2021//
TI  - The see-saw portal at future Higgs Factories
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 117
EP  - 32pp
VL  - 03
IS  - 3
PB  - Springer
KW  - Beyond Standard Model
KW  - Higgs Physics
KW  - Neutrino Physics
AB  - We consider an extension of the Standard Model with two right-handed singlet fermions with mass at the electroweak scale that induce neutrino masses, plus a generic new physics sector at a higher scale Lambda. We focus on the effective operators of lowest dimension d = 5, which induce new production and decay modes for the singlet fermions. We assess the sensitivity of future Higgs Factories, such as FCC-ee, CLIC-380, ILC and CEPC, to the coefficients of these operators for various center of mass energies. We show that future lepton colliders can test the cut-off of the theory up to Lambda similar or equal to 500-1000 TeV, surpassing the reach of future indirect measurements of the Higgs and Z boson widths. We also comment on the possibility of determining the underlying model flavor structure should a New Physics signal be observed, and on the impact of higher dimensional d = 6 operators on the experimental signatures.
SN  - 1029-8479
UR  - https://arxiv.org/abs/2011.04725
UR  - https://doi.org/10.1007/JHEP03(2021)117
DO  - 10.1007/JHEP03(2021)117
LA  - English
N1  - WOS:000629645800001
ID  - Barducci_etal2021
ER  -