Domain wall QCD with near-physical pions
Domain wall QCD with near-physical pions
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DOI：
10.1103/physrevd.87.094514
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发表时间：
2012-08
影响因子：
5
通讯作者：
R. Arthur;T. Blum;T. Blum;P. Boyle;N. Christ;N. Garron;R. Hudspith;T. Izubuchi;C. Jung;C. Kelly;A. Lytle;R. Mawhinney;David Murphy;S. Ohta;S. Ohta;S. Ohta;C. Sachrajda;Amarjit Soni;J. Yu;J. Zanotti
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文献类型：
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作者：
R. Arthur;T. Blum;T. Blum;P. Boyle;N. Christ;N. Garron;R. Hudspith;T. Izubuchi;C. Jung;C. Kelly;A. Lytle;R. Mawhinney;David Murphy;S. Ohta;S. Ohta;S. Ohta;C. Sachrajda;Amarjit Soni;J. Yu;J. Zanotti
我们提出的物理结果的各种轻强子数量通过三个2+1味域壁费米子系综集的综合分析。对于我们的两个系综，我们使用岩崎规范作用量，β=2.13（a-1=1.75（4）GeV）和β=2.25（a-1=2.31（4）GeV），晶格尺寸分别为243×64和323×64，幺正π介子质量在293（5）-417（10）MeV范围内。在这些系综中，畴壁费米子公式的第5维的范围Ls为Ls=16。在这个分析中，我们包括第三个合奏集，利用小说岩崎+DSDR β=1.75时的（位错抑制行列式比）规范作用（a-1=1.37（1）GeV），晶格尺寸为323×64，Ls=32，以达到低至143（1）MeV的部分猝灭π介子质量和171（1）MeV的单位π介子质量，同时保持良好的手征对称性和拓扑隧穿。我们证明了一个显着的改善，我们的手征外推控制，从而大大提高了连续预测上述数量。主要结果包括π介子和K介子的衰变常数：fπ=127（3）stat（3）sys MeV，fK=152（3）stat（2）sys MeV（fK/fπ=1.199（12）stat（14）sys）;平均上/下夸克质量和奇异夸克质量的MS-方案在3 GeV，泥浆（MS <$，3 GeV）=3.05（8）stat（6）sys MeV and ms（MS <$，3 GeV）=83.5（1.7）国家（1.1）sys; 3 GeV，BK时MS¯-方案中的中性K介子混合参数（MS <$，3 GeV）=0.535（8）stat（13）sys，在RGI方案中，B^K=0.758（11）stat（19）sys; Sommer量表r1=0.323（8）stat（4）sys fm和r 0 =0.480（10）stat（4）sys（r1/r 0 =0.673（11）stat（3）sys）。我们还得到了SU（2）手征微扰理论有效耦合的值，l3 <$=2.91（23）stat（7）sys和l4 <$=3.99（16）stat（9）sys。
We present physical results for a variety of light hadronic quantities obtained via a combined analysis of three 2+1 flavour domain wall fermion ensemble sets. For two of our ensemble sets we used the Iwasaki gauge action with β=2.13 (a-1=1.75(4) GeV) and β=2.25 (a-1=2.31(4) GeV) and lattice sizes of 243×64 and 323×64 respectively, with unitary pion masses in the range 293(5)–417(10) MeV. The extent Ls for the 5th dimension of the domain wall fermion formulation is Ls=16 in these ensembles. In this analysis we include a third ensemble set that makes use of the novel Iwasaki+DSDR (dislocation suppressing determinant ratio) gauge action at β=1.75 (a-1=1.37(1) GeV) with a lattice size of 323×64 and Ls=32 to reach down to partially-quenched pion masses as low as 143(1) MeV and a unitary pion mass of 171(1) MeV, while retaining good chiral symmetry and topological tunneling. We demonstrate a significant improvement in our control over the chiral extrapolation, resulting in much improved continuum predictions for the above quantities. The main results of this analysis include the pion and kaon decay constants, fπ=127(3)stat(3)sys MeV and fK=152(3)stat(2)sys MeV respectively (fK/fπ=1.199(12)stat(14)sys); the average up/down quark mass and the strange-quark mass in the MS¯-scheme at 3 GeV, mud(MS¯,3 GeV)=3.05(8)stat(6)sys MeV and ms(MS¯,3 GeV)=83.5(1.7)stat(1.1)sys; the neutral kaon mixing parameter in the MS¯-scheme at 3 GeV, BK(MS¯,3 GeV)=0.535(8)stat(13)sys, and in the RGI scheme, B^K=0.758(11)stat(19)sys; and the Sommer scales r1=0.323(8)stat(4)sys fm and r0=0.480(10)stat(4)sys (r1/r0=0.673(11)stat(3)sys). We also obtain values for the SU(2) chiral perturbation theory effective couplings, l3¯=2.91(23)stat(7)sys and l4¯=3.99(16)stat(9)sys.