Probing the unitarity of the renormalizable theory of massive conformal gravity
arXiv:1707.08851 · doi:10.1140/epjc/s10052-018-5762-8
Abstract
The presence of an unstable massive spin-2 ghost state in the renormalizable theory of massive conformal gravity leads to a pair of complex poles appearing in the first sheet of the energy plane. Here we show that the positions of these poles are gauge dependent, which makes the theory unitary.
8 pages; v2: 9 pages; v3: 9 pages, e-mail and typos corrected in Eq. (39), match the published version