12th Workshop on Flavor Symmetries and Consequences in Accelerators and Cosmology (FLASY 2026)

Session

Contributed 1

18 Aug 2026, 16:00

Commodore Hotel

41. RG Running of Multiple Neutrino Mixing Parameters at Oscillation Experiments

Chui-Fan Kong (IBS-CTPU-PTC)

18/08/2026, 16:00

Parallel talks: 17'+3'

If the new physics scale is within the energy scale of neutrino oscillation experiments, it may lead to a renormalization group (RG) running effect between the production and detection processes as well as between different experiments. It is then possible to use multiple neutrino oscillation experiments to disentangle the multiple RG running parameters. We investigate this effect in a...

49. Structure functions at low momentum transfer and neutrino cross sections (tentative)

Yu Seon Jeong (Sungkyunkwan University)

18/08/2026, 16:20

Parallel talks: 17'+3'

Neutrino interaction cross sections below 100 GeV are important for current and next-generation neutrino oscillation experiments. Future accelerator-based experiments such as SHiP and the planned Forward Physics Facility will be able to probe neutrino interactions in this energy regime. Reliable theoretical predictions of neutrino cross sections are essential. In this region, deep inelastic...

42. Dirac Neutrino Masses from the Scoto-Seesaw Mechanism

Ranjeet Kumar (Seoul National University of Science and Technology)

18/08/2026, 16:40

Parallel talks: 17'+3'

In this talk, I will discuss a simple Dirac scoto-seesaw framework based on the anomaly-free $U(1)_{B-L}$ charge assignment $(-4,-4,5)$ for $\nu_R$. This chiral charge assignment naturally accounts for the observed neutrino mass-squared differences, with $\Delta m^2_{\rm atm}$ generated at tree level and $\Delta m^2_{\rm sol}$ arising radiatively. After the spontaneous breaking of gauged...

10. The Goldstone Portal to Charged Lepton Flavour Violation

Antonio Herrero Brocal

18/08/2026, 17:00

Parallel talks: 17'+3'

Neutrino mass models usually involve the breaking of a custodial symmetry related to the masslessness of neutrinos in the Standard Model. Focusing on low-scale seesaws, we will show how, in contrast with scenarios where the symmetry is explicitly broken, the case of spontaneous symmetry breaking introduces crucial distinct directions, mainly through the associated Nambu-Goldstone Boson ($G$)....

55. Quark hierarchies and CP violation from Siegel modular forms

Matteo Parriciatu (INFN Sezione Roma Tre)

18/08/2026, 17:20

Parallel talks: 17'+3'

We consider a flavour framework in which quark mass hierarchies naturally arise from a small departure of the modulus VEV from special stabilised regions of genus 2. By extending the modular group to this genus, the same VEV can also account for the spontaneous breaking of the assumed CP symmetry. We present a modular quark model which is able to fit both the mass hierarchies and the CKM...

15. Stringy Constraints on Modular Flavor Models

Takafumi Kai (Kyushu University)

18/08/2026, 17:40

Parallel talks: 17'+3'

We investigate stringy constraints on moduli spaces in modular flavor models by analyzing moduli-dependent threshold corrections in heterotic string vacua. While moduli play a crucial role in determining the flavor structure of fermions predicted by modular flavor models, the parameter space in which their vacuum expectation values are allowed has not been fully explored. In this work, within...