Radiative decays of charged leptons in the seesaw effective field theory with one-loop matching
Radiative decays of charged leptons in the seesaw effective field theory with one-loop matching
复制标题
单环匹配跷跷板有效场理论中带电轻子的辐射衰变
DOI:
10.1016/j.physletb.2021.136463
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发表时间:
2021-02
期刊:
影响因子:
--
通讯作者:
Shun Zhou
中科院分区:
文献类型:
--
作者:
Di Zhang;Shun Zhou
The canonical type-I seesaw model with three heavy Majorana neutrinos is one of the most natural extensions of the standard model (SM) to accommodate tiny Majorana masses of three ordinary neutrinos. At low-energy scales, Majorana neutrino masses and unitarity violation of lepton flavor mixing have been extensively discussed in the literature, which are respectively generated by the unique dimension-five Weinberg operator and one dimension-six operator in the seesaw effective field theory (SEFT) with the tree-level matching. In this work, we clarify that a self-consistent calculation of radiative decays of charged leptons β−→ α−+ γ requires the SEFT with one-loop matching, where new six-dimensional operators emerge and make important contributions. 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.
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