@article{b5afbe643d7f455bb11afa513de26e2c,
title = "Nucleon form factors on a large volume lattice near the physical point in 2+1 flavor QCD",
abstract = "We present results for the isovector nucleon form factors measured on a 964 lattice at almost the physical pion mass with a lattice spacing of 0.085 fm in 2+1 flavor QCD. The configurations are generated with the stout-smeared O(a)-improved Wilson quark action and the Iwasaki gauge action at β=1.82. The pion mass at the simulation point is about 146 MeV. A large spatial volume of (8.1 fm)3 allows us to investigate the form factors in the small momentum transfer region. We determine the isovector electric radius and magnetic moment from nucleon electric (GE) and magnetic (GM) form factors as well as the axial-vector coupling gA. We also report on the results of the axial-vector (FA), induced pseudoscalar (FP) and pseudoscalar (GP) form factors in order to verify the axial Ward-Takahashi identity in terms of the nucleon matrix elements, which may be called the generalized Goldberger-Treiman relation.",
author = "{PACS Collaboration} and Ishikawa, {Ken Ichi} and Yoshinobu Kuramashi and Shoichi Sasaki and Natsuki Tsukamoto and Akira Ukawa and Takeshi Yamazaki",
note = "Funding Information: We thank Toshimi Suda, Eigo Shintani and Oliver B{\"a}r for useful discussions, and Yusuke Namekawa for his careful reading of the manuscript. Numerical calculations for the present work have been carried out on the FX10 supercomputer system at Information Technology Center of the University of Tokyo, on the HA-PACS and COMA cluster systems under the “Interdisciplinary Computational Science Program” of Center for Computational Science at University of Tsukuba, on HOKUSAI GreatWave at Advanced Center for Computing and Communication of RIKEN, and on the computer facilities of the Research Institute for Information Technology of Kyushu University. This research used computational resources of the HPCI system provided by Information Technology Center of the University of Tokyo, Institute for Information Management and Communication of Kyoto University, the Information Technology Center of Nagoya University, and RIKEN Advanced Institute for Computational Science through the HPCI System Research Project (Project ID: hp120281, hp130023, hp140209, hp140155, hp150135, hp160125, hp170022, hp180072). We thank the colleagues in the PACS Collaboration for helpful discussions and providing us the code used in this work. This work is supported in part by MEXT SPIRE Field 5, and also by Grants-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology (No. 16H06002), and Grant-in-Aid for Scientific Research (C) (No. 18K03605). Publisher Copyright: {\textcopyright} 2018 authors. Published by the American Physical Society.",
year = "2018",
month = oct,
day = "1",
doi = "10.1103/PhysRevD.98.074510",
language = "English",
volume = "98",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society",
number = "7",
}