A Return To Neutrino Normalcy

Understand

Understanding the structure of the fermion mixing matrices is an important question in particle physics.

• The quark mixing matrix is approximately diagonal while the lepton mixing matrix has large off-diagonal elements.
• Attempting to understand these structures has been the focus of an large body of literature over the last several decades.
• In this article we propose a new set of conditions to test the structure of mass matrices called normalcy based on how close to diagonal the mixing matrix is.