METRIC-SCALAR GRAVITY WITH TORSION AND THE MEASURABILITY OF THE NON-MINIMAL COUPLING

The "measurability" of the non-minimal coupling is discussed by considering the correction to the Newtonian static potential in the semiclassical 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.