期刊
SCIPOST PHYSICS
卷 5, 期 6, 页码 -出版社
SCIPOST FOUNDATION
DOI: 10.21468/SciPostPhys.5.6.065
关键词
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资金
- ExtreMe Matter Institute (EMMI)
- DFG Collaborative Research Centre [SFB 1225]
- [BMBF 05P12VHCTG]
We reconstruct the gluon spectral function in Landau gauge QCD from numerical data for the gluon propagator. The reconstruction relies on two novel ingredients: Firstly we derive analytically the low frequency asymptotics of the spectral function. Secondly we construct a functional basis from a careful consideration of the analytic properties of the gluon propagator in Landau gauge. This allows us to reliably capture the non-perturbative regime of the gluon spectrum. We also compare different reconstruction methods and discuss the respective systematic errors.
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