期刊
PHYSICAL REVIEW D
卷 78, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.78.054513
关键词
-
资金
- Deutsche Forschungsgemeinschaft
- Department of Energy [DE-FG02-91-ER40690, DE-AC02-98CH10886(BNL)]
- Leverhulme Trust
- Natural Sciences and Engineering Research Council
- National Science Foundation
- Science and Technology Facilities Council
- Science and Technology Facilities Council [ST/G000581/1, ST/G00059X/1] Funding Source: researchfish
- STFC [ST/G00059X/1, ST/G000581/1] Funding Source: UKRI
We use lattice QCD simulations, with MILC gluon configurations and HISQ c-quark propagators, to make very precise determinations of moments of charm-quark pseudoscalar, vector and axial-vector correlators. These moments are combined with new four-loop results from continuum perturbation theory to obtain several new determinations of the MS mass of the charm quark and of the MS coupling. We find m(c)(3 GeV) = 0.986(10) GeV, or, equivalently, m(c)(mc) = 1.268(9) GeV, both for n(f) = 4 flavors; and alpha((MS) over bar)(3 GeV, n(f) = 4) = 0.251(6), or, equivalently, alpha((MS) over bar)(M-Z,M- n(f) = 5) = 0.1174(12). The new mass agrees well with results from continuum analyses of the vector correlator using experimental data for e(+) e(-) annihilation ( instead of using lattice QCD simulations). These lattice and continuum results are the most accurate determinations to date of this mass. Ours is also one of the most accurate determinations of the QCD coupling by any method.
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