2025/01/23 by Shoichi Sasaki, Sasaki, Shoichi, Yasumichi Aoki +15 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2501.13490
openalex publication_date 2025/01/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31
In the PACS10 project, the PACS collaboration has generated three sets of the PACS10 gauge configurations at the physical point with lattice volume larger than (10 \rm fm)4 and three different lattice spacings. The isovector nucleon form factors had been already calculated by using two sets of the PACS10 gauge configurations. In our strategy, the smearing parameters of the nucleon interpolation operator were highly optimized to eliminate as much as possible the contribution of excited states in the nucleon two-point function. This strategy was quite successful in calculations of the electric (GE), magnetic (GM) and axial-vector (FA) form factors, while the induced pseudoscalar (FP) and pseudoscalar (GP) form factors remained strongly affected by residual contamination of πN-state contribution. In this work, we propose a simple method to remove the πN-state contamination from the FP form factor, and then evaluate the induced pseudoscalar charge gP^∗ and the pion-nucleon coupling gπNN from existing data in a new analysis. Applying this method to the GP form factor is also considered with a help of the axial Ward-Takahashi identity.