Nucleon isovector couplings from 2+1 flavor lattice QCD at the physical point

2019/12/02 by Natsuki Tsukamoto, Tsukamoto, Natsuki, Yasumichi Aoki +11
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.1912.00654

openalex publication_date 2019/12/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present results on the axial, scalar and tensor isovector-couplings of the nucleon from 2+1 flavor lattice QCD with physical light quarks (m_π = 135 MeV) in large spatial volume of (10.8 fm)³. The calculations are carried out with the PACS10 gauge configurations generated by the PACS Collaboration with the stout-smeared O(a) improved Wilson fermions and Iwasaki gauge action at β=1.82 corresponding to the lattice spacing of 0.084 fm. For the renormalization, we use the RI/SMOM scheme, a variant of Rome-Southampton RI/MOM scheme with reduced systematic errors, as the intermediate scheme. We then evaluate our final results in the \rm MS scheme at a scale of 2 GeV, using the continuum perturbation theory for the matching scale of RI/SMOM and \rm MS schemes and running.

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