Axion decaying into muons (IMAGE) University of Minnesota Caption The University of Minnesota researchers’ new method of searching for the hypothetical axion involves measuring the “decay” of the particle into two muons—known particles that are essentially the heavier version of the electron—as illustrated in the above image. Credit Raymond Co, University of Minnesota Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.