Speaker
Description
Coupling gravity to the U(1) gauge sector induces higher-order gauge interactions that can be investigated using functional renormalization group (FRG) techniques. Within the framework of Asymptotic Safety, previous studies have shown that the existence of ultraviolet (UV) completions for these induced interactions can impose constraints, for example, on the strength of gravitational interactions at high energies. This leads to the so-called “Weak Gravity Bound”. In this work, we study the impact of distinguishing between different pure-matter and gravity-matter avatars of the induced interactions. These are known to follow different renormalization group flows within truncated settings. We analyze how introducing these distinct avatars modifies the fixed-point structure of the system. By examining the stability properties of the resulting UV fixed points, we also assess the predictivity of the theory as well as the extent to which universality of couplings is restored at infrared scales.
| Affiliation | Radboud University |
|---|---|
| Career status | PhD student |