Lattice QCD Calculation of Hadronic Light-by-Light Scattering.

Lattice QCD Calculation of Hadronic Light-by-Light Scattering.
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强子逐光散射的晶格 QCD 计算

DOI:
10.1103/physrevlett.115.222003
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发表时间:
2015
影响因子:
8.6
通讯作者:
V. Pascalutsa
V. Pascalutsa
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
J. Green;O. Gryniuk;G. von Hippel;H. B. Meyer;V. Pascalutsa

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我们用格点QCD方法计算了较宽运动学范围内的强子光-光散射振幅。在正向运动学,结果进行比较的基础上色散和光的光散射规则的现象学分析。研究了典型强子尺度动量的π极贡献的大小。所提出的数值方法可用于计算强子光对μ子反常磁矩的贡献。我们的计算是在双味QCD中进行的,π介子质量在270 - 450 MeV范围内,到目前为止只包含全连通夸克线的图。
We perform a lattice QCD calculation of the hadronic light-by-light scattering amplitude in a broad kinematical range. At forward kinematics, the results are compared to a phenomenological analysis based on dispersive sum rules for light-by-light scattering. The size of the pion pole contribution is investigated for momenta of typical hadronic size. The presented numerical methods can be used to compute the hadronic light-by-light contribution to the anomalous magnetic moment of the muon. Our calculations are carried out in two-flavor QCD with the pion mass in the range of 270–450 MeV and contain so far only the diagrams with fully connected quark lines.
DOI: --
发表时间: 2006
期刊: --
影响因子: --
作者:
Iroon Polytechniou-
通讯作者: Iroon Polytechniou-