Latest observations on the low energy excess in CRESST-III

Understand

The CRESST experiment observes an unexplained excess of events at low energies.

• In the current CRESST-III data-taking campaign we are operating detector modules with different designs to narrow down the possible explanations.
• In this work, we show first observations of the ongoing measurement, focusing on the comparison of time, energy and temperature dependence of the excess in several detectors.
• These exclude dark matter, radioactive backgrounds and intrinsic sources related to the crystal bulk as a major contribution.