PIRSA:23040070

MeV Sterile Neutrinos in Light of the Cabibbo-Angle Anomaly

Tobioka, K. (2023). MeV Sterile Neutrinos in Light of the Cabibbo-Angle Anomaly. Perimeter Institute. https://pirsa.org/23040070

Tobioka, Kohsaku. MeV Sterile Neutrinos in Light of the Cabibbo-Angle Anomaly. Perimeter Institute, Apr. 25, 2023, https://pirsa.org/23040070 

          @misc{ pirsa_PIRSA:23040070,
            doi = {10.48660/23040070},
            url = {https://pirsa.org/23040070},
            author = {Tobioka, Kohsaku},
            keywords = {Particle Physics},
            language = {en},
            title = {MeV Sterile Neutrinos in Light of the Cabibbo-Angle Anomaly},
            publisher = {Perimeter Institute},
            year = {2023},
            month = {apr},
            note = {PIRSA:23040070 see, \url{https://pirsa.org}}
          }

Kohsaku Tobioka

Florida State University

Talk number
PIRSA:23040070
Collection
Talk Type
Subject
Abstract

The mixing angles of the quark sectors are constrained by unitarity in the standard model. However, recent data indicates a about 3 sigma deviation from unitarity in the mixing angle between the 1st and 2nd generation down-type quarks, known as the Cabibbo angle anomaly. The observations include the charged-current weak decays of neutrons, nuclei, kaons, and the hadronic decay of tau leptons. Although the issue appears to lie in the quark sector, modifying the neutrino sector may offer a solution. In this talk, we discuss recent findings that suggest a sterile neutrino of MeV mass mixing with the electron-type neutrino can resolve the Cabibbo angle anomaly. We also examine the current bounds and future prospects of this scenario.

Zoom Link:  https://pitp.zoom.us/j/98083942792?pwd=eHFRUmJUVGNJcVpTSHZXVXFKQm95QT09