https://doi.org/10.1140/epjc/s10052-016-4384-2
Regular Article - Theoretical Physics
Unimodular trees versus Einstein trees
1
Instituto de Física Teórica, IFT-UAM/CSIC, Universidad Autónoma, 28049, Madrid, Spain
2
Departamento de Física Teórica, Universidad Autónoma de Madrid, 28049, Madrid, Spain
3
Departamento de Física Teórica I Facultad de Ciencias Físicas, Universidad Complutense de Madrid (UCM), Av. Complutense S/N (Ciudad Univ.), 28040, Madrid, Spain
* e-mail: sergio.gonzalez.martin@csic.es
Received:
26
July
2016
Accepted:
15
September
2016
Published online:
12
October
2016
The maximally helicity violating tree-level scattering amplitudes involving three, four or five gravitons are worked out in Unimodular Gravity. They are found to coincide with the corresponding amplitudes in General Relativity. This a remarkable result, insofar as both the propagators and the vertices are quite different in the two theories.
© The Author(s), 2016