Nucleon matrix element of Weinberg's CP-odd gluon operator from the instanton vacuum

Nucleon matrix element of Weinberg's CP-odd gluon operator from the instanton vacuum

We calculate the nucleon matrix element of Weinberg's dimension-6 CP-odd gluon operator fabc(F˜μν)a(Fμρ)b(Fρν)c in the instanton vacuum. In leading order of the instanton packing fraction, the dimension-6 operator is effectively proportional to the topological charge density (F˜μν)a(Fμν)a, whos...

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Bibliographic Details
Main Author: C. Weiss
Format: Article
Language:English
Published: Elsevier 2021-08-01
Series:Physics Letters B
Subjects:
QCD composite operators
Instanton vacuum
Topological charge
CP-violation
Neutron electric dipole moment
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269321003877

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http://www.sciencedirect.com/science/article/pii/S0370269321003877

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