no code implementations • 9 Feb 2021 • Di Zhang, Shun Zhou
For the first time, the Wilson coefficients of all the relevant six-dimensional operators are computed by carrying out the one-loop matching between the effective theory and full seesaw model, and applied to calculate the total rates of radiative decays of charged leptons.
High Energy Physics - Phenomenology High Energy Physics - Experiment
no code implementations • 8 Feb 2021 • Xin Wang, Shun Zhou
In a class of neutrino mass models with modular flavor symmetries, it has been observed that CP symmetry is preserved at the fixed point (or stabilizer) of the modulus parameter $\tau = {\rm i}$, whereas significant CP violation emerges within the neighbourhood of this stabilizer.
High Energy Physics - Phenomenology
no code implementations • 25 Sep 2020 • Bingrong Yu, Shun Zhou
In particular, the emphasis is placed on the number of CP-violating phases in the presence of a partial mass degeneracy (e. g., $m^{}_1 = m^{}_2 \neq m^{}_3$) or a complete mass degeneracy $m^{}_1 = m^{}_2 = m^{}_3$, where $m^{}_i$ (for $i = 1, 2, 3$) stand for the masses of three ordinary neutrinos.
High Energy Physics - Phenomenology
