sterile neutrino

Dark matter is invisible; it’s everywhere; and it doesn’t interact with matter very often. The same is true for neutrinos. So are neutrinos dark matter? Neutrino physicist Kirsty Duffy and neutrino/dark matter researcher Asher Kaboth (Royal Holloway, University of London) break down the most likely dark matter candidates and where neutrinos fit into the mix.

From Le Scienze (France), November 4, 2021: The preliminary analysis of three years of data from the MicroBooNE experiment show no signs of the existence of a fourth type of neutrino. The standard model of particle physics remains confirmed but it has not excluded clues to exotic physical phenomena may emerge.

From Scientific American, November 4, 2021: Physicists have wondered if neutrino particles come in a mysterious fourth variety. Now new experimental findings complicate the question. Physicists have wondered if neutrino particles come in a mysterious fourth variety. Now new experimental findings complicate the question.

From Quanta, October 28, 2021: In 1993, Los Alamos National Laboratory saw hints of a fourth kind of neutrino which led to MiniBooNE. Now the results of MicroBooNE reveal sterile neutrinos alone cannot account for the MiniBooNE anomaly and the results are consistent with the possibility that only half of MiniBooNE’s events are due to neutrino oscillations.

From the BBC, October 27, 2021: Yesterday, the MIcroBooNE collaboration opened a new chapter in physics with the announcement of their results; the search failed to find the particle, known as the sterile neutrino.

This episode features an edition of Particle/Counter Particle. In this science debate show, two physicists discuss the possible existence of “sterile neutrinos,” a theorized fourth kind of neutrino. If sterile neutrinos exist, it would be a radical discovery, adding a new building block to the Standard Model of Particle Physics.