Spectrum of heavy quarkonium hybrids: hyperfine splitting

Abstract

Hyperfine structure of heavy quarkonium hybrids is ruled by two potentials which behaviours is only known at short and long distances. In this paper, these potentials are realistically interpolated and fitted with existing theoretical data for charmonium hybrids. Then, the spectrum of charmonium and bottomonium hybrids is calculated with a preexisting program and the hyperfine splittings are found