English

Initial nucleon structure results with chiral quarks at the physical point

High Energy Physics - Lattice 2014-12-11 v1

Abstract

We report initial nucleon structure results computed on lattices with 2+1 dynamical M\"obius domain wall fermions at the physical point generated by the RBC and UKQCD collaborations. At this stage, we evaluate only connected quark contributions. In particular, we discuss the nucleon vector and axial-vector form factors, nucleon axial charge and the isovector quark momentum fraction. From currently available statistics, we estimate the stochastic accuracy of the determination of gAg_A and <x>ud<x>_{u-d} to be around 10%, and we expect to reduce that to 5% within the next year. To reduce the computational cost of our calculations, we extensively use acceleration techniques such as low-eigenmode deflation and all-mode-averaging (AMA). We present a method for choosing optimal AMA parameters.

Keywords

Cite

@article{arxiv.1412.3175,
  title  = {Initial nucleon structure results with chiral quarks at the physical point},
  author = {S. Syritsyn and T. Blum and M. Engelhardt and J. Green and T. Izubuchi and C. Jung and S. Krieg and M. Lin and S. Meinel and J. Negele and S. Ohta and A. Pochinsky and E. Shintani},
  journal= {arXiv preprint arXiv:1412.3175},
  year   = {2014}
}

Comments

7 pages, 11 figures; talk presented at the 32nd International Symposium on Lattice Field Theory, 23-28 June, 2014, Columbia University, New York, USA

R2 v1 2026-06-22T07:25:59.072Z