5 papers
Weak Scale Triggers in the SMEFT
Pier Giuseppe Catinari, Raffaele Tito D'Agnolo, Pablo Sesma
There are no weak scale triggers in the SMEFT up to dimension six that can solve the hierarchy problem far above the weak scale. Our arguments can be used to show that the same is…
Insights into the highest natural scale: Finite naturalness challenges inflationary dynamics
Pier Giuseppe Catinari, Loris Del Grosso, Luca Di Giovanni +1
We apply the criterion of finite naturalness to the limiting case of a generic heavy sector decoupled from the Standard Model. The sole and unavoidable exception to this decoupling…
Hunting axion dark matter with anti-ferromagnets: a case study with nickel oxide
Pier Giuseppe Catinari, Angelo Esposito, Shashin Pavaskar
We show that nickel oxide, which is already a very promising target to look for sub-MeV dark matter scattering, can be employed to hunt axion dark matter, with masses in the meV ra…
An EFT for anisotropic anti-ferromagnets: gapped Goldstones, pseudo-Goldstones, and phase transitions
Pier Giuseppe Catinari, Angelo Esposito, Shashin Pavaskar
We build and discuss a low energy effective field theory for anisotropic anti-ferromagnets in presence of an external magnetic field. Such an effective theory is simple yet rich, a…
Gravitational instantons and the quality problem of the QCD axion: Facts, speculations, and statements in between
Pier Giuseppe Catinari, Alfredo Urbano
In this work, we critically reanalyze the explicit breaking of the Peccei-Quinn global symmetry -- and the corresponding corrections to the QCD axion potential -- induced by gravit…