2+1 flavor full QCD configurations by the JLQCD Collaboration

The 2+1 flavor full QCD configurations listed below are generated by on supercomputer

the BlueGene/Q (6144 nodes, peak 1.258 PFLOPS)
at the High Energy Accelerator Research Organization (KEK)

Simulation parameters
Configuration ensembles
Naming of Ensembles and Configurations (for ILDG users)
Location of Configurations (for JLDG users)

Simulation parameters

These gauge configurations are generated with the tree-level Symanzik-improved gauge action at β = 6/g²=4.17 and the Möbius domain-wall fermion action with the stout smeared links with the smearing parametor ρ=0.1 and the number of smearing steps N_smear = 3. The ud and s quark masses are set to 0.007 and 0.03, resepctively, where M_π ≈ 300 MeV. The lattice spacing is a = 0.080 fm. We have one ensemble on 32³ × 64 × 12 lattice.

The table below shows the values of a, La and the simulation parameters.

ensemble #	β	m_uda m_sa	(ρ, N_smear)	lattice size	a [fm]	La [fm]	τ

1	4.17	0.007 0.03	(0.1, 3)	32³ × 64 × 12	0.0804(1)	2.573(3)	0.5

Form factors of B → πlν and a determination of |V_ud| with Möbius domain-wall fermions
B. Colquhoun, S. Hashimoto, T. Kaneko, and J. Koponen (JLQCD Collaboration)
Phys. Rev. D 106, 054502 (2022)

Configuration ensembles

The table below gives a list of ensembles of configurations. A consecutive set of trajectories for a given value of β, m_la, m_sa on a particular lattice size is called an ensemble.

Note that the ud and s quarks couple to the smeared link variables produced by the stout smearing method with ρ=0.1, N_smear=3.

ensemble #	β	m_uda	m_sa	lattice size	traj. range	missing traj	stored at every (traj)	#config	size/config [GiB]	total [GiB]
1	4.17	0.007	0.03	32³ × 64 × 12	1010-16910	2010-4910 7010-9910	100	100	1.125	112.5

Naming of Ensembles and Configurations (for ILDG users)

An ensemble is identified by markovChainURI named e.g. as

mc://JLDG/JLQCD/SymMDW_NF2+1/SymMDW_32x64_b4.17_Ls12_mud0.0070_ms0.030

A configuration is labeled by dataLFN named e.g. as

lfn://JLDG/JLQCD/SymMDW_NF2+1/SymMDW_32x64_b4.17_Ls12_mud0.0070_ms0.030_1010

Basename of the dataLFN is formmated as
SymMDW _ spatial size x temporal size _ β _ L_s _ m_ud _ m_s _ trajectory number

To get full list of markovChainURIs and LFNs, please use QCDml faceted navigation. or follow this link.

Location of Configurations (for JLDG users)

Configurations are placed in the gfarm directory
/gfarm/public/ILDG/JLDG/JLQCD/SymMDW_NF2+1/
Filename is the same as basename of dataLFN. All ensemble and configuration XML files can be found in
/gfarm/public/ILDG/JLDG/JLQCD/SymMDW_NF2+1/QCDml/

Last update: 12 February 2026, H. Ohno