Nov 20, 2024 · Strange pentaquark Molecular (top) and compact (bottom) interpretations of the P c c s (4338) pentaquark discovered by the LHCb collaboration in 2022. Credit: D Dominguez. Breakthroughs are like London buses. You wait a long time, and three turn up at once. In 1963 and 1964, Murray Gell-Mann, André Peterman and George Zweig independently developed the concept of quarks (q) and antiquarks (q ...