Neutrinos have always been elusive particles. They have mass, but are described as massless in the Standard Model. This leads to the question of how the mass of neutrinos is generated. According to the Standard Model, all fermions, with the exception of neutrinos, are present in left and right chiral variations.
The idea of extending the neutrino sector to include right-chiral variations already existed before the discovery of neutrino mass. And while left-chiral neutrinos can be described as mysterious, right-chiral neutrinos are downright phantoms. Many experiments have searched for these particles, but there is no evidence of their existence to date.
Suraj Krishnamurthy combined the strongest limits on right-handed neutrinos in a statistically rigorous manner, with the aim of mapping the profile likelihood in the coupling-mass plane.
Suraj Krishnamurthy: A Frequentist Analysis of the n=3 Type-I Seesaw Model
Prof. J. de Boer
Dr. C. Weniger
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