Isospin breaking corrections to meson masses and the hadronic vacuum polarization: a comparative study
Isospin breaking corrections to meson masses and the hadronic vacuum polarization: a comparative study
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介子质量和强子真空极化的同位旋断裂修正：比较研究
DOI：
10.1007/jhep09(2017)153
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发表时间：
2017
影响因子：
5.4
通讯作者：
C. Sachrajda
中科院分区：
文献类型：
--
作者：
P. Boyle;V. Gülpers;James Harrison;A. Jüttner;C. Lehner;A. Portelli;C. Sachrajda
我们在一个64 × 243晶格上进行了探索性研究，计算了强同位旋破缺和对介子质量的QED修正以及强子真空极化，该晶格的反晶格间距为a−1 = 1.78 GeV，同位旋对称π介子质量为mπ = 340 MeV.我们包括量子电动力学在电淬火设置使用两种不同的方法，随机和微扰的方法。我们发现，领先的强子贡献的μ子的异常磁矩的电磁校正是小于1%的上夸克和0.1%的奇夸克，虽然应该注意的是，这是使用非物理轻夸克质量。除了结果本身之外，我们还比较了使用每种方法在相同计算成本下可以达到的精度。对介子的电磁质量分裂也作了这样的比较。
We calculate the strong isospin breaking and QED corrections to meson masses and the hadronic vacuum polarization in an exploratory study on a 64 × 243 lattice with an inverse lattice spacing of a−1 = 1.78 GeV and an isospin symmetric pion mass of mπ = 340 MeV. We include QED in an electro-quenched setup using two different methods, a stochastic and a perturbative approach. We find that the electromagnetic correction to the leading hadronic contribution to the anomalous magnetic moment of the muon is smaller than 1% for the up quark and 0.1% for the strange quark, although it should be noted that this is obtained using unphysical light quark masses. In addition to the results themselves, we compare the precision which can be reached for the same computational cost using each method. Such a comparison is also made for the meson electromagnetic mass-splittings.
强子逐光散射的晶格 QCD 计算
影响因子：
8.6
作者：
J. Green;O. Gryniuk;G. von Hippel;H. B. Meyer;V. Pascalutsa
通讯作者：
V. Pascalutsa
影响因子：
56.9
作者：
Borsanyi, Sz.;Durr, S.;Toth, B. C.
通讯作者：
Toth, B. C.