Gradient Flow of the Weinberg Operator

Year: 2025

Type: conference-paper

Abstract: We present preliminary results on the susceptibilities involving the CP-violating (CPV) Weinberg three-gluon operator and the topological Θ term using the gradient flow scheme, and study their continuum and chiral extrapolations. These are used to provide an estimate of the Θ induced by the Weinberg operator in theories with the Peccei-Quinn (PQ) mechanism. Combined with the calculations of the matrix elements (MEs) of quark-bilinears between nucleon states, such calculations will enable estimates of the electric dipole moments (EDMs) and CPV pion-nucleon couplings due to the Weinberg operator, thereby providing robust constraints on beyond the standard model (BSM) physics.

Source: International Symposium on Lattice Field Theory (LATTICE)

DOI: 10.22323/1.466.0344

Authors: Tanmoy Bhattacharya, Shohini Bhattacharya, Vincenzo Cirigliano, Rajan Gupta, Emanuele Mereghetti, Sungwoo Park, Jun-Sik Yoo, Boram Yoon

Institutions: University of Connecticut, University of Washington, Los Alamos National Laboratory

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: U.S. Department of Energy, National Energy Research Scientific Computing Center, Office of Science, High Energy Physics, Laboratory Directed Research and Development, Lawrence Livermore National Laboratory, Los Alamos National Laboratory

OpenAlex ID: W4407414555