Hadronic Parity Violation from 4-quark Interactions

2021/11/17 by Aniket Sen, Sen, Aniket, Marcus Petschlies +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-lat

paper · pdf · doi:10.48550/arxiv.2111.09025

LATTICE2021 proceedings

arxiv created 2021/11/17 · openalex publication_date 2021/11/17 · arxiv updated 2021/11/18 · openalex created_date 2022/05/05 · openalex updated_date 2026/07/28

Abstract

We present an exploratory investigation of the parity odd ΔI = 1 pion-nucleon coupling h_π¹ from lattice QCD. Based on the PCAC relation, we study the parity-conserving effective Hamiltonian and extract the coupling by determining the nucleon mass splitting arising from the effective 4-quark interactions using the Feynman-Hellmann theorem. We present preliminary results of the mass shift for a 32³ × 64 ensemble of N_f = 2 + 1 + 1 twisted mass fermions at pion mass 260 MeV and lattice spacing a = 0.097 fm.

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