Testing Froggatt-Nielsen flavour models with gravitational waves
by
Prof.Lorenzo Calibbi(Nankai University)
→
Asia/Shanghai
Tsung-Dao Lee Institute/N6F-N600 - Lecture Room (Tsung-Dao Lee Institute)
Tsung-Dao Lee Institute/N6F-N600 - Lecture Room
Tsung-Dao Lee Institute
40
Description
Abstract:
I will present a recently published work where we assessed the capability of Gravitational Wave (GW) experiments to probe the origin of the flavour sector of the Standard Model. Within the context of the Froggatt-Nielsen mechanism to generate the hierarchical patterns of fermion masses and mixing based on a gauged U(1) flavour symmetry, we investigated the formation of cosmic strings and the resulting GW background (GWB), estimating the sensitivity to the model’s parameter space of future GW observatories. Comparing these results with bounds from low-energy flavour observables, we found that these two types of experimental probes of the model are nicely complementary. In certain scenarios, the combination of flavour constraints and future GW bounds can bring about a complete closure of the parameter space, which (once again) illustrates the potential of GWB searches to test fundamental interactions at ultra-high energy scales beyond the reach of laboratory experiments.
Short bio:
Lorenzo Calibbi received a PhD in physics at the University of Padua (Italy) in 2007, after which he held postdoctoral positions in Italy, Germany and Belgium. In 2015, he moved to China to work as senior research associate at the Institute of Theoretical Physics in Beijing and, since 2019, as associate professor at the School of Physics of the Nankai University in Tianjin. His research focuses on theory and phenomenology of particle physics beyond the Standard Model, in particular: flavour physics, dark matter model building and phenomenology, searches for new physics at colliders, and the interplay among the above subjects.
