2024-03-28T23:12:47Z
https://tsukuba.repo.nii.ac.jp/oai
oai:tsukuba.repo.nii.ac.jp:00051932
2022-07-18T23:51:39Z
117:3152
3048:798
3:62:5598:84
Nucleon form factors and root-mean-square radii on a (10.8??fm)4 lattice at the physical point
藏増, 嘉伸
クラマシ, ヨシノブ
KURAMASHI, Yoshinobu
山﨑, 剛
ヤマザキ, タケシ
YAMAZAKI, Takeshi
Shintani, Eigo
Ishikawa, Ken-Ichi
Sasaki, Shoichi
We present the nucleon form factors and root-mean-square (RMS) radii measured on a (10.8??fm)4 lattice at the physical point. We compute the form factors at small momentum transfer region in q2?0.102??GeV2 with the standard plateau method choosing four source-sink separation times tsep from 0.84 to 1.35 fm to examine the possible excited state contamination. We obtain the electric and magnetic form factors and their RMS radii for not only the isovector channel but also the proton and neutron ones without the disconnected diagram. We also obtain the axial-vector coupling and the axial radius from the axial-vector form factor. We find that these three form factors do not show large tsep dependence in our lattice setup, and those RMS radii are consistent with the experimental values. On the other hand, the induced pseudoscalar and pseudoscalar form factors show the clear effects of the excited state contamination, which affect the generalized Goldberger-Treiman relation.
journal article
American Physical Society
2019-01
application/pdf
Physical review D
1
99
014510
2470-0010
AA00773624
https://tsukuba.repo.nii.ac.jp/record/51932/files/PRD_99-1-014510.pdf
eng
https://doi.org/10.1103/PhysRevD.99.014510
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
open access