Physicists confront the neutron lifetime puzzle

From left, ORNL’s Matthew Frost and Leah Broussard used a neutron scattering instrument at the Spallation Neutron Source to search for a dark matter twin to the neutron. Credit: Genevieve Martin/ORNL, US Dept. of Energy To solve a long-standing puzzle about how long a neutron can “live” outside an atomic nucleus, physicists entertained a wild … Read more