Metric-scalar gravity with torsion and the measurability of the non-minimal coupling
arXiv:gr-qc/0503084 · doi:10.1142/S0217732307021378
Abstract
The "measurability" of the non-minimal coupling is discussed by considering the correction to the Newtonian static potential in the semi-classical approach. The coefficient of the "gravitational Darwin term" (GDT) gets redefined by the non-minimal torsion-scalar couplings. Based on a similar analysis of the GDT in the effective field theory approach to non-minimal scalar we conclude that for reasonable values of the couplings the correction is very small.
10 pages, LaTex. Accepted for publication in Mod. Phys. Lett. A