Hadronic Parity Violation from Twisted Mass Lattice QCD

2023/01/16 by Schlage, Nikolas, Petschlies, Marcus, Sen, Aniket +1
#FOS: Physical sciences #High Energy Physics - Lattice (hep-lat)

paper · doi:10.48550/arxiv.2301.06359

Abstract

We present results for an exploratory lattice calculation of the leading parity-violating pion-nucleon coupling h_π¹. Based on the PCAC relation we use a parity-conserving Lagrangian and focus on the techniques to determine the nucleon matrix elements of the effective 4-quark operators. For our study we employ an ensemble of twisted mass fermions with 260 MeV pion mass. Barring mixing with lower-dimensional operators and renormalization at this stage, we discuss our estimate for h_π¹.

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