Speaker
Riccardo Gandolfo
(University of Catania, INFN Catania)
Description
According to usual calculations in quantum field theory, both in flat and curved spacetime, the mass of a scalar particle is quadratically sensitive to the ultimate scale of the theory, the UV physical cutoff. Elaborating on previous work in quantum gravity, I will show that (when due attention is paid to the path integral measure and to the way the physical cutoff is introduced) the mass of the scalar particle presents only a (mild) logarithmic sensitivity to the cutoff. This result is obtained without resorting to any supersymmetric embedding of the theory. Moreover, no regularization scheme (as dimensional regularization), where power-like divergences are absent by construction, is used.
Author
Riccardo Gandolfo
(University of Catania, INFN Catania)
