Speaker
Yilin Zhou
(Fudan University)
Description
Three enigmatic structures, X(6600), X(6900), and X(7100), have emerged from the J/ψJ/ψ (J/ψ → μ+μ−) spectrum as candidate all-charm tetraquarks, a rare and exotic form of matter. Using 315 fb^{−1} of proton-proton collisions data recorded by the CMS detector, yielding 3.6 times more J/ψJ/ψ pairs than previous studies, one can achieve a sharper view of these states, with significantly improved precision. All three structures and the interference among them are observed with a statistical significance above five standard deviations, suggesting common JPC quantum numbers.
Primary author
Yilin Zhou
(Fudan University)
