FLASY 2025 - 11th Workshop on Flavour Symmetries and Consequences in Accelerators and Cosmology

Session

Parallel session III

1 Jul 2025, 14:30

Aula "MUSUMECI" (Roma Tre)

Conveners

Parallel session III: 1-III

• Alessio Giarnetti

Parallel session III: 2-III

• Stefano Morisi (Istituto Nazionale di Fisica Nucleare)

38. Leptogenesis with low-energy Dirac CP-violation

Alessandro Granelli (Istituto Nazionale di Fisica Nucleare)

01/07/2025, 14:30

The present Baryon Asymmetry of the Universe (BAU) can be explained in the framework of the type-I seesaw mechanism for neutrino mass generation through leptogenesis (LG). The L-, C- and CP-violating processes involving the right-handed neutrinos can generate an early lepton asymmetry, which is later converted into the present BAU by sphalerons. Remarkably, all the necessary CP-violation...

40. CP violation in $B_s\to \phi\mu^+\mu^-$ Decay at FCC-$ee$

Jason Aebischer (CERN)

01/07/2025, 14:50

The feasibility of the time-dependent $C\!P$ violation measurement $B_s^0 \to \phi(\to K^+K^-)\mu^+\mu^-$ at the FCC-$ee$ is discussed. Future $Z$-factories offer an ideal setting for measuring this decay due to the large statistics, clean environment, particle identification, and excellent vertexing capabilities. These precision measurements are interpreted in the Weak Effective Theory (WET),...

49. Vector-like quark doublets, weak-basis invariants and CP violation

José Bastos

01/07/2025, 15:10

Even though a fourth chiral generation of fermions is experimentally ruled out, the possibility of extending the SM with vector-like quarks (VLQs), where both chiral components transform the same way under SU(2)_L cannot be excluded. In particular, extensions of the SM involving isodoublet vector-like quarks with standard charges currently stand as the favoured candidate in explaining the...

4. Underpinnings of CP-Violation at the High-energy Frontier

Shaouly Bar-Shalom (Technion, Israel)

01/07/2025, 15:30

I will present a general analysis for the discovery potential of CP-violation (CPV) searches in scattering processes at TeV-scale colliders in an effective field theory approach.
The CP-violating sector of the SMEFT framework will be examined in some well motivated limiting cases, based on flavour symmetries of the underlying heavy theory. In particular, we show that under naturality...

50. Flavor-deconstructed neutrinos

Avelino Vicente (IFIC (CSIC - U. Valencia))

01/07/2025, 16:30

A tentative approach to explain the flavor puzzle consists of embedding the Standard Model in a larger gauge symmetry that contains a separate gauge group for each fermion family. In such gauge non-universal (or flavor-deconstructed) theories, neutrinos pose some challenges. I will discuss existing ideas in the literature and present a simple model in which flavor deconstruction naturally...

12. Exploring Flavour Symmetries and Long-Lived Particles with the FASER Experiment

Cristiano Sebastiani (CERN)

01/07/2025, 16:50

The FASER experiment at the LHC explores long-lived particles (LLPs) and their connections to flavour symmetries. Recent results include constraints on dark photons and axion-like particles (ALPs), which are often motivated by flavour-related dynamics, as well as the first detection of high-energy collider neutrinos, providing insights into neutrino flavour oscillations and constraints on...