期刊
PHYSICAL REVIEW D
卷 96, 期 7, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.96.074016
关键词
-
资金
- National Research Foundation, NRF (South Africa)
- National Institute for Theoretical Physics, NITheP (South Africa)
- DFG [SFB 1044]
A new QCD sum rule determination of the leading order hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon, a(mu)(hvp), is proposed. This approach combines data on e(+)e(-) annihilation into hadrons, perturbative QCD and lattice QCD results for the first derivative of the electromagnetic current correlator at zero momentum transfer,Pi'(EM)(0). The idea is based on the observation that, in the relevant kinematic domain, the integration kernel K(s), entering the formula relating a(mu)(hvp) to e(+)e(-) annihilation data, behaves like 1/s times a very smooth function of s, the squared energy. We find an expression for a(mu) in terms of Pi'(EM)(0), which can be calculated in lattice QCD. Using recent lattice results we find a good approximation for a(mu)(hvp), but the precision is not yet sufficient to resolve the discrepancy between the R(s) data-based results and the experimentally measured value.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据