2+1 flavor light hadron spectrum with PACS10 configurations
Abstract
We present the results for the hadron spectrum, the pseudoscalar meson decay constants, and the quark mass ratio in the continuum limit using the ``PACS10'' gauge configurations generated with the O(a)-improved Wilson quark action and the Iwasaki gauge action. Numerical simulations are carried out at three lattice spacings keeping the space-time volumes over (10 fm)4 in 2+1 flavor QCD at the physical point. We calculate physical quantities with two choices of conventions to define pseudoexperimental values expected in the isosymmetric QCD. In order to investigate the finite size effects on the physical quantities we have additionally generated the (5.4 fm)4 lattice at the coarsest lattice spacing of a=0.08487(14)~fm, which is a hypercube with half the length in each direction compared to the PACS10 configurations. While the finite size effect is hardly observed in comparison of the hadron effective masses on the (10.9 fm)4 and (5.4 fm)4 lattices, the results for the pseudoscalar meson decay constants show discrepancies beyond the error bars. The (5.4 fm)4 lattice also serves for determining the expansion parameters of the pseudoscalar meson masses and decay constants, and the octet baryon masses in terms of the quark masses around the physical point with the aid of the mass reweighting technique. The expansion parameters are used for the fine-tuning of the physical point employing the pseudoexperimental masses of the π meson, K meson, and the Ξ baryon as physical inputs in each convention. We compare the results for the octet baryon masses and the pseudoscalar decay constants in the continuum limit with the corresponding pseudoexperimental values in both conventions. We also discuss the deviation between two results with different conventions. As for the quark mass ratio the result is compared with the recent FLAG summary.
Related
- Theoretical Review on Bulk Properties and Light/Strange Hadron Production in Heavy-Ion Collisions
- Experimental Review on Bulk Properties and Light/Strange Hadron Production in Heavy-Ion Collisions
- Neutral Pseudoscalar Mesons, Hadron Light-by-Light Scattering, and the Muon Anomalous Magnetic Moment
- Status and Progress of Hamiltonian Effective Field Theory in Light Hadron Spectroscopy
- Tomography of light hadron structures: From LCDAs to iTMDs
BibTeX
@misc{ishikawa2026flavor,
title = {{2+1 flavor light hadron spectrum with PACS10 configurations}},
author = {K. -I. Ishikawa and N. Ishizuka and Y. Kuramashi and Y. Nakamura and Y. Namekawa and K. Satoh and E. Shintani and Y. Taniguchi and N. Ukita and H. Watanabe and T. Yamazaki and T. Yoshié},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.02426},
eprint = {2611.02426},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.02426},
}
RIS
TY - UNPB
TI - 2+1 flavor light hadron spectrum with PACS10 configurations
AU - K. -I. Ishikawa
AU - N. Ishizuka
AU - Y. Kuramashi
AU - Y. Nakamura
AU - Y. Namekawa
AU - K. Satoh
AU - E. Shintani
AU - Y. Taniguchi
AU - N. Ukita
AU - H. Watanabe
AU - T. Yamazaki
AU - T. Yoshié
PY - 2026
DA - 2026/11/02
PB - arXiv
DO - 10.48550/arxiv.2611.02426
UR - https://arxiv.org/abs/2611.02426
AB - We present the results for the hadron spectrum, the pseudoscalar meson decay constants, and the quark mass ratio in the continuum limit using the ``PACS10'' gauge configurations generated with the O(a)-improved Wilson quark action and the Iwasaki gauge action. Numerical simulations are carried out at three lattice spacings keeping the space-time volumes over (10 fm)^4 in 2+1 flavor QCD at the physical point. We calculate physical quantities with two choices of conventions to define pseudoexperimental values expected in the isosymmetric QCD. In order to investigate the finite size effects on the physical quantities we have additionally generated the (5.4 fm)^4 lattice at the coarsest lattice spacing of a=0.08487(14)~fm, which is a hypercube with half the length in each direction compared to the PACS10 configurations. While the finite size effect is hardly observed in comparison of the hadron effective masses on the (10.9 fm)^4 and (5.4 fm)^4 lattices, the results for the pseudoscalar meson decay constants show discrepancies beyond the error bars. The (5.4 fm)^4 lattice also serves for determining the expansion parameters of the pseudoscalar meson masses and decay constants, and the octet baryon masses in terms of the quark masses around the physical point with the aid of the mass reweighting technique. The expansion parameters are used for the fine-tuning of the physical point employing the pseudoexperimental masses of the π meson, K meson, and the Ξ baryon as physical inputs in each convention. We compare the results for the octet baryon masses and the pseudoscalar decay constants in the continuum limit with the corresponding pseudoexperimental values in both conventions. We also discuss the deviation between two results with different conventions. As for the quark mass ratio the result is compared with the recent FLAG summary.
ER -