(Received January 17, 1984)
A new Lagrangian for a gravitational field is proposed which yields fourth order differential equations. Three types of gravitational energy-“tensor” are investigated. The weak field approximation shows that the present theory describes massive spin 2 and spinless fields in addition to the ordinary graviton field.
URL : http://ptp.ipap.jp/link?PTP/71/1116/
DOI : 10.1143/PTP.71.1116