Kavli Affiliate: Jonathan L. Rosner | First 5 Authors: Marek Karliner, Jonathan L. Rosner, , , | Summary: The LHCb experiment at CERN has discovered a doubly charmed isoscalar tetraquark $T_{cc}$ with the quantum numbers of $c c bar u bar d$ and mass of about 3875 MeV/$c^2$, decaying to $D^0 D^0 pi^+$ through the […]