Speaker
Dr
Sander Mooij
Description
We review and generalise renormalisation methods in QFT in which no intermediate divergences show up. Moreover, in two-field models with a large mass hierarchy between the fields, the usual fine-tunings proportional to the large mass are absent. Therefore, in this formulation of perturbative QFT there is no naturalness problem at all: there is no influence from the "heavy" sector on the dynamics of the "light" sector. This strengthens the intuition that there is no physical meaning in the concept of naturalness.
Author
Dr
Sander Mooij
