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arXiv · 2005.04181

Extracting a model quark propagator's spectral density

Zehao Zhu·Khépani Raya·Lei Chang
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Abstract

We propose a practical procedure to extrapolate the space-like quark propagator onto the complex plane, which follows the Schlessinger Point Method and the spectral representation of the propagator. As a feasible example, we employ quark propagators for different flavors, obtained from the solutions of the corresponding Dyson-Schwinger equation (DSE). Two different truncations are employed. Thus, the analytical structure of the quark propagator is studied, capitalizing on the current-quark mass dependence of the observed features.

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Zehao Zhu, Khépani Raya, Lei Chang. 2020-05-08. Extracting a model quark propagator's spectral density. https://doi.org/10.1103/physrevd.103.034005

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