Update on Z(4430) and X(3872) at Belle
Sadaharu Uehara (for the Belle Collaboration)
TL;DR
This paper reports updated measurements of the exotic states X(3872) and Z(4430) at Belle, including mass, branching fractions, and decay processes, with a Dalitz analysis of Z(4430) decays.
Contribution
It provides new experimental data on the properties and decay modes of X(3872) and Z(4430), advancing understanding of their tetraquark nature.
Findings
Updated mass and branching fraction measurements for X(3872)
Dalitz analysis results for Z(4430) decays
Evidence supporting tetraquark interpretations
Abstract
The X(3872) and Z(4430) are candidates of tetraquark state with a ccbar pair. We present results from Belle recently updated for the mass, branching fractions etc. in different production/decay processes of the X(3872). Results from a Dalitz analysis for B --> Z(4430) K --> psi' pi^+- K are also presented.
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Taxonomy
TopicsQuantum Chromodynamics and Particle Interactions · Particle physics theoretical and experimental studies · Nuclear physics research studies