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Abstract

We derive a Wilson coefficient of a CP-violating purely gluonic dimension-6 operator called the Weinberg operator GGG∼ generated by a scalar and two fermions at the two-loop level. We do not specify the representation of SU(3)c for the scalar and the fermions, and thus our result can be applied to a variety of models beyond the standard model. We estimate the nucleon EDMs induced by the Weinberg operator in some examples and discuss the importance of measuring EDMs. It is found that future measurements of the EDMs can probe physics at higher energy scale beyond the reach of collider experiments.

Details

Title
Model independent evaluation of the Wilson coefficient of the Weinberg operator in QCD
Author
Abe, Tomohiro 1 ; Hisano, Junji 2 ; Nagai, Ryo 3 

1  Institute for Advanced Research, Nagoya University, Nagoya, Aichi, Japan; Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, Nagoya University, Nagoya, Aichi, Japan 
2  Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, Nagoya University, Nagoya, Aichi, Japan; Department of Physics, Nagoya University, Nagoya, Aichi, Japan; Kavli IPMU (WPI), UTIAS, University of Tokyo, Kashiwa, Chiba, Japan 
3  Department of Physics, Tohoku University, Sendai, Miyagi, Japan 
Pages
1-21
Publication year
2018
Publication date
Mar 2018
Publisher
Springer Nature B.V.
e-ISSN
10298479
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1007/JHEP03(2018)175
ProQuest document ID
2019741249
Copyright
Journal of High Energy Physics is a copyright of Springer, (2018). All Rights Reserved.