Reply to "Comment on 'Quantum massive conformal gravity' by F. F. Faria"

Recently in (Eur. Phys. J. C 76:341, 2016) [arXiv:1604.08706], Myung has suggested that the renormalizability of massive conformal gravity is meaningless unless the massive ghost states of the theory are stable. Here we show that massive conformal gravity can be renormalizable having unstable ghost states.Comment: v2: 2 pages, completely different version, match the published versio

Probing the unitarity of the renormalizable theory of massive conformal gravity

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.Comment: 8 pages; v2: 9 pages; v3: 9 pages, e-mail and typos corrected in Eq. (39), match the published versio

Massive conformal gravity

In this article we construct a massive theory of gravity that is invariant under conformal transformations. The massive action of the theory depend on the metric tensor and a scalar field, which are considered as the only field variables. We find the vacuum field equations of the theory and the solution of its Newtonian limit.Comment: v2: 6 pages, some missing terms were added in the field equation (7). v3: 9 pages, several improvements to match the published versio

Quantum massive conformal gravity

We first find the linear approximation of the second plus fourth order derivative massive conformal gravity action. Then we reduce the linearized action to separated second order derivative terms, which allows us to quantize the theory by using the standard first order canonical quantization method. It is shown that quantum massive conformal gravity is renormalizable but has ghost states. A possible decoupling of these ghost states at high energies is discussed.Comment: v2: 10 pages, quantization procedure changed. v3: 10 pages, improved version, match the published versio

Trash Talk Unpicking the deadlock around urban waste and regeneration

'Situating Mary Douglas’ famous formulation that “dirt is matter out of place” relative to time may lead us to think that litter is matter out of time, and that the responses and interventions this evokes are similarly timed, as well as spatialised.' Nolan, R., Jones, P. & Sharma, P. (2022, March 8). Introduction to March’s Theme: Time [Online]. The Sociological Review Magazine. https://doi.org/10.51428/tsr.irfx897