Physicists discover new kind of tetraquark—the longest-lived yet found

Enlarge / An artist’s impression of Tcc+, a tetraquark composed of two charm quarks and an up and a down antiquark. (credit: CERN) The exotic family of particles known as tetraquarks has a surprising new member. Dubbed T cc + , it’s the first tetraquark to contain two heavy quarks and two light antiquarks, and […]