Excited heavy tetraquarks with hidden charm

TL;DR

This paper calculates the masses of excited heavy tetraquarks with hidden charm using a relativistic diquark-antidiquark model, providing insights into several charmonium-like states as potential tetraquarks.

Contribution

It introduces a relativistic approach to modeling heavy tetraquarks with hidden charm, incorporating diquark structure and form factors, and discusses implications for experimental states.

Findings

Identifies several charmonium-like states as potential tetraquarks.

Provides mass predictions consistent with experimental data.

Uses a relativistic diquark-antidiquark framework.

Abstract

The masses of the excited heavy tetraquarks with hidden charm are calculated within the relativistic diquark-antidiquark picture. The dynamics of the light quark in a heavy-light diquark is treated completely relativistically. The diquark structure is taken into account by calculating the diquark-gluon form factor. New experimental data on charmonium-like states above open charm threshold are discussed. The obtained results indicate that X(3872), Y(4260), Y(4360), Z(4248), Z(4433) and Y(4660) could be tetraquark states with hidden charm.