Preview of the Lab’s seminar by Yuriy Shitov 18.09.2019 “Search for light sterile neutrino in reactor experiments”.

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Category: Новости
 

 

Most results of neutrino oscillation experiments can be successfully described by the three-component neutrino theory (PMNS matrix). However, observed anomalies (reactor and Gallium neutrino anomaly, inconsistent results at the LSND and MiniBooNE experiments) can be also explained by the existence of a sterile neutrino. This fourth type of neutrino does not interact in a standard way (hence the use of the term “sterile”), but mixes (oscillates) with the others. Expected range of the mixing phase space Dm2  ~ 2 eV2, sin2(2q) ~ 0.1 was determined by global analysis of available experimental data with the best value in the region Dm2 ~ 2 eV2, sin2(2q) ~ 0.1. The possible existence of a new fundamental physics triggered experimental tests in different research directions to check the hypothesis. 

The current status of major short-baseline reactor experiments, such as DANSS, PROSPECT, STEREO etc. will be reported at this seminar. Various compact neutrino detectors (mass ~ 1-5 tonnes) located next to different reactors (5-25 m away) are operating in these projects. Today, a lot of experiments are accumulating their data and publishing new results, which will be discussed at the seminar.