Spectroscopy of Qanti Qg hybrid mesons

Hybrid mesons composed of a quark, an antiquark, and a gluon are studied in the case of heavy quarks. Their masses are calculated with the potential model which can interpret heavy quarkonium spectroscopy.The ground state of the hybrid mesons canti cg and banti bg is found to be almost spherically symmetric, whereas that of tanti tg is two-centered as an H2+ molecule. The banti bg [tanti tg] ground state turns out to have a mass below the Banti B [Tanti T] threshold. The excited states contain 0--, 1-+ exotic states and 1-1 states which may be examined by e+ e- colliders. (orig.)