Nucleon structure with pion mass down to 149 MeV

Jeremy Green; Michael Engelhardt; Stefan Krieg; John Negele; Andrew Pochinsky; Sergey Syritsyn

Nucleon structure with pion mass down to 149 MeV

High Energy Physics - Lattice 2013-01-11 v1

Authors: Jeremy Green , Michael Engelhardt , Stefan Krieg , John Negele , Andrew Pochinsky , Sergey Syritsyn

Abstract

We present isovector nucleon observables: the axial, tensor, and scalar charges and the Dirac radius. Using the BMW clover-improved Wilson action and pion masses as low as 149 MeV, we achieve good control over chiral extrapolation to the physical point. Our analysis is done using three different source-sink separations in order to identify excited-state effects, and we make use of the summation method to reduce their size.

Keywords

pion production chiral perturbation theory nuclear physics

Cite

@article{arxiv.1211.0253,
  title  = {Nucleon structure with pion mass down to 149 MeV},
  author = {Jeremy Green and Michael Engelhardt and Stefan Krieg and John Negele and Andrew Pochinsky and Sergey Syritsyn},
  journal= {arXiv preprint arXiv:1211.0253},
  year   = {2013}
}

Comments

7 pages, 5 figures. Talk presented at the 30th International Symposium on Lattice Field Theory (Lattice 2012), June 24-29, 2012, Cairns, Australia

Nucleon structure with pion mass down to 149 MeV

Abstract

Keywords

Cite

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