Ghost spectral function from the spectral Dyson-Schwinger equation

We compute the ghost spectral function in Yang-Mills theory by solving corresponding Dyson-Schwinger equation for a given input gluon function. The results encompass both scaling and decoupling solutions propagator input. resulting displays particle peak at vanishing momentum negative scattering spectrum, whose infrared ultraviolet tails are obtained analytically. dressing is computed entire complex plane, its salient features identified discussed.