Exploring Charm Bound States: Mass Spectra and Decay Dynamics of D Mesons and $Cq\bar{q}\bar{q}$ Tetraquarks

TL;DR

This paper investigates the mass spectra and decay properties of charm mesons and tetraquarks using a potential model, aiming to explain recently observed exotic charm states and their underlying structure.

Contribution

It introduces a diquark-antidiquark framework with a Cornell potential to analyze charm mesons and tetraquarks, providing new theoretical insights into their spectra and decay behaviors.

Findings

Mass spectra align with observed resonances

Decay patterns support tetraquark interpretations

Enhanced understanding of charm quark bound states

Abstract

Motivated by the discovery of several charm states exhibiting tetraquark-like characteristics at BESIII and LHCb, this study investigates the spectroscopy and decay properties of D mesons and tetraquark states with quark content $Cq\bar{q}\bar{q}$ within the diquark - antidiquark framework. The analysis is performed using a potential model based on the Cornell potential, considering color antitriplet - triplet configurations. Mass spectra are computed for both mesons and tetraquarks, while their decay behaviors are examined using the factorization approach for D mesons and Fierz rearrangement for tetraquark decays. Theoretical results are compared with experimentally observed resonances to improve our understanding of charm quark bound systems.