PT Journal
AU Ferreiro, A
   Navarro-Salas, J
TI Running couplings from adiabatic regularization
SO Physics Letters B
JI Phys. Lett. B
PY 2019
BP 81
EP 85
VL 792
DI 10.1016/j.physletb.2019.03.026
LA English
DE Adiabatic renormalization; Running couplings; Semiclassical Maxwell-Einstein equations
AB We extend the adiabatic regularization method by introducing an arbitrary mass scale μin the construction of the subtraction terms. This allows us to obtain, in a very robust way, the running of the coupling constants by demanding mu-invariance of the effective semiclassical (Maxwell-Einstein) equations. In particular, we get the running of the electric charge of perturbative quantum electrodynamics. Furthermore, the method brings about a renormalization of the cosmological constant and the Newtonian gravitational constant. The running obtained for these dimensionful coupling constants has new relevant (non-logarithmic) contributions, not predicted by dimensional regularization.
ER