Initial nucleon structure results with chiral quarks at the physical point

RBC and LHP collaborations

Research output: Contribution to journalArticle

Abstract

We report initial nucleon structure results computed on lattices with 2+1 dynamical Möbius 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 gA and (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.

Original languageEnglish (US)
Article number134
JournalProceedings of Science
VolumePart F130500
StatePublished - 2014

ASJC Scopus subject areas

  • General

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