TY - JOUR
T1 - Nucleon structure from 2+1 flavor lattice QCD near the physical point
AU - Tsukamoto, Natsuki
AU - Ishikawa, Ken Ichi
AU - Kuramashi, Yoshinobu
AU - Sasaki, Shoichi
AU - Yamazaki, Takeshi
N1 - Funding Information:
Acknowledgments: 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 the Oakforest-PACS system of Joint Center for Advanced High Performance Computing, 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). 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).
Publisher Copyright:
© The Authors, published by EDP Sciences, 2018.
PY - 2018/3/26
Y1 - 2018/3/26
N2 - We present an update on our results of nucleon form factors measured on a large-volume lattice (8:1fm)4 at almost the physical point in 2+1 flavor QCD. The configurations are generated with the stout-smeared O(a) improved Wilson quark action and Iwasaki gauge action at β = 1:82, which corresponds to the lattice spacing of 0.085 fm. The pion mass at the simulation point is about 145 MeV. We determine the isovector electric radius and magnetic moment from nucleon electric (GE) and magnetic (GM) form factors. We also report on preliminary results of the axial-vector (FA), induced pseudo-scalar (FP) and pseudo-scalar (GP) form factors in order to verify the axial Ward-Takahashi identity in terms of the nucleon matrix elements, which may be called as the generalized Goldberger-Treiman relation.
AB - We present an update on our results of nucleon form factors measured on a large-volume lattice (8:1fm)4 at almost the physical point in 2+1 flavor QCD. The configurations are generated with the stout-smeared O(a) improved Wilson quark action and Iwasaki gauge action at β = 1:82, which corresponds to the lattice spacing of 0.085 fm. The pion mass at the simulation point is about 145 MeV. We determine the isovector electric radius and magnetic moment from nucleon electric (GE) and magnetic (GM) form factors. We also report on preliminary results of the axial-vector (FA), induced pseudo-scalar (FP) and pseudo-scalar (GP) form factors in order to verify the axial Ward-Takahashi identity in terms of the nucleon matrix elements, which may be called as the generalized Goldberger-Treiman relation.
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U2 - 10.1051/epjconf/201817506007
DO - 10.1051/epjconf/201817506007
M3 - Conference article
AN - SCOPUS:85045144566
SN - 2101-6275
VL - 175
JO - EPJ Web of Conferences
JF - EPJ Web of Conferences
M1 - 06007
T2 - 35th International Symposium on Lattice Field Theory, Lattice 2017
Y2 - 18 June 2017 through 24 June 2017
ER -