Month: Marzec 2026

Dnia 27 marca (piątek) o godzinie 11:30, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„Fermat primes  in flavour mixing and mass hierarchies”

Referuje: prof. dr hab. Jacek Ciborowski (IFD UW)

A Balmer-like empirical  analysis of quark and neutrino mixing angles and of the charged-lepton mass hierarchy suggests a remarkable interplay between number theory and geometry, involving  Fermat primes  5 and 17 (or equivalently the golden ratio in place of the former). The resulting pattern fixes two of the three a priori unknown parameters entering the (presently frequently exploited) Froggatt–Nielsen description of flavour hierarchies.  This may provide useful guidance for further phenomenological studies (quark and neutrino masses)  and possibly for the search for a more fundamental theory of flavour.

Serdecznie zapraszamy

dr hab. Katarzyna Grzelak

prof. dr hab. Aleksander Filip Żarnecki

Dnia 20 marca (piątek) o godzinie 11:30, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„Neutrino Flux Prediction and Uncertainties in T2K”

Referuje: dr Haradhan Adhikary (IFD UW)

Neutrino flux prediction and its associated uncertainties are of central importance for precision oscillation measurements in long-baseline experiments. In this talk, I will present the current neutrino flux prediction for the T2K experiment, obtained using hadron production measurements from NA61/SHINE at the CERN SPS on both thin and T2K replica targets.

The methods employed in T2K to predict and constrain the neutrino flux will be described, including the use of external hadron production data and in-situ constraints from near-detector measurements. Finally, future plans within T2K to further improve flux prediction and uncertainty treatment will be outlined, together with a discussion of the broader community needs required to reduce flux-related uncertainties in support of next-generation precision neutrino oscillation experiments.

Serdecznie zapraszamy

dr hab. Katarzyna Grzelak

prof. dr hab. Aleksander Filip Żarnecki