Neutrino masses in the Standard Model effective field theory

We compute the leading-logarithmic correction to the neutrino mass matrix in the Standard Model effective field theory (SMEFT) to dimension seven. In the limit of negligible lepton and down-type quark Yukawa couplings, it receives contributions from the Weinberg dimension-five operator as well as fr...

Full description

Saved in:
Bibliographic Details
Published in:Physical review. D 2021-08, Vol.104 (3), p.1, Article 035002
Main Authors: Chala, Mikael, Titov, Arsenii
Format: Article
Language:English
Subjects:
Couplings
Field theory
Leptons
Mass matrix
Neutrinos
Operators
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We compute the leading-logarithmic correction to the neutrino mass matrix in the Standard Model effective field theory (SMEFT) to dimension seven. In the limit of negligible lepton and down-type quark Yukawa couplings, it receives contributions from the Weinberg dimension-five operator as well as from 11 dimension-six and five dimension-seven independent interactions. Two of the main implications we derive from this result are the following. First, we find dimension-seven operators which, despite violating lepton number, do not renormalize neutrino masses at one loop. And second, we demonstrate that the presence of dimension-six operators around the TeV scale can modify the Standard Model prediction by up to O(50%). Our result comprises also one step forward towards the renormalization of the SMEFT to order v3/Λ3.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.104.035002