Speaker
Description
The Reactor Antineutrino Anomaly (RAA)—a long-standing discrepancy between the measured and predicted antineutrino flux—has been a cornerstone in the search for light sterile neutrinos. In recent years, the anomaly was partially attributed to uncertainties in reactor flux models, particularly the 235U contribution. However, new experimental results, most notably from the BEST gallium experiment, along with updated flux evaluations, have sparked a "revival" of the RAA.
This poster reviews the latest developments in this field, highlighting how the combined evidence from reactor and gallium experiments challenges a purely model-based explanation. We explore the renewed case for the sterile neutrino hypothesis and discuss the critical role of upcoming high-precision neutrino experiments in resolving this mystery.