Exploring charm bound states: Mass spectra and decay dynamics of <i>D</i> mesons and cqqq tetraquarks

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 [Formula: see text] 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.