NuFact 2022: The 23rd International Workshop on Neutrinos from Accelerators

July 30, 2022 to August 6, 2022
Cliff Lodge
US/Mountain timezone

PMNS and the number of additional neutrino flavors

Aug 2, 2022, 3:30 PM
30m
Magpie B

Magpie B

Talk WG5: Beyond PMNS

Speaker

Janusz Gluza (U. Silesia)

Description

In accordance with the WG subject, we are concerned with the fundamental question of the number of neutrino species existing in nature. We report on a theoretical description of the mixing space based on singular values, contractions, and dilation procedures. With a bird’s eye perspective, it provides an independent way of doing neutrino mixing analysis allowing for quantitative searches of extra neutrino states, establishing alternative limits on the “active-sterile” mixing, defining disjoint physical regions of the mixings among scenarios with a different number of sterile neutrinos. We give the pros and cons of the method. Concerning applications to phenomenological studies, going beyond PMNS, we try to understand the emergence of complete models with masses and mixings of heavy neutrino states and potential implications for collider and cosmological studies.

Attendance type In-person presentation

Primary author

Janusz Gluza (U. Silesia)

Co-authors

Wojciech Flieger (MPI Munich) Biswajit Karmakar (U. of Silesia)