Exotic charmonium-like spectroscopy at LHCb: a study of the X(3872) and of the Z(4430)^-

TL;DR

This paper reports recent LHCb findings on exotic charmonium-like states, including evidence for X(3872) decay modes and detailed measurements of Z(4430)^- properties, advancing understanding of these unusual particles.

Contribution

It provides new experimental evidence and precise measurements of the X(3872) decay and the Z(4430)^- properties, including quantum numbers and resonance nature.

Findings

Evidence for X(3872)→ψ(2S)γ decay

Improved measurements of Z(4430)^- mass and width

Determination of Z(4430)^-'s quantum numbers and resonant character

Abstract

I will report on the recent LHCb results on the evidence for the decay $X(3872)\rightarrow\psi(2S) \gamma$, and on the improved measurement of the mass and width of the $Z(4430)^-$, the determination of its quantum numbers and the observation of its resonant character.