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Using the functional method, one-loop matching of the type-I, -II and -IIIseesaw models are investigated and the results are presented in both theGreen's and the Warsaw bases. Although these models generate the samedimension-5 Weinberg operator, they could induce quite different types ofdimension-6 effective operators that can be utilized for model discrimination.We also find the threshold effects from one-loop matching could be significant,which turn out to allow triggering electroweak symmetry breaking radiatively intype-II seesaw while forbid that in type-I/-III models. An analytical criterionfor such radiative symmetry breaking is also derived in type-II seesaw.Finally, we investigate the indirect signatures from different types ofdimension-6 operators at high-energy colliders, low-energy precisionexperiments and forward physics facilities for model discrimination.

Neutrino seesaw models at one-loop matching: Discrimination by effective operators