The spectra of bcbc tetraquark states from a diquark-antidiquark perspective

2025/08/17 by Wang, Zhen-Yang, Qi, Jing-Juan, Zhang, Zhen-Hua +1
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2508.12366

Abstract

Within the diquark-antidiquark framework, this study investigates the masses of ground-state tetraquarks composed of heavy charm (c) and bottom (b) quarks and antiquarks, using the Bethe-Salpeter formalism. We establish the Bethe-Salpeter equations for the fully heavy bcbc tetraquarks to the leading order in 1/m_Q expansion. These equations are subsequently solved numerically under the covariant instantaneous approximation with kernels containing scalar confinement and one-gluon exchange terms. Our results show that the spectra of all possible S-wave tetraquark states are above the corresponding two lowest meson decay thresholds via the quark rearrangement. This implies that the ground bcbc tetraquark states should be broad.

Citations

• Exploring fully-heavy tetraquarks through the CGAN framework: Mass and width
• Scalar fully-charm and bottom tetraquarks under extreme temperatures
• Electromagnetic and hadronic decay of fully heavy tetraquark
• Inclusive production of fully-charmed tetraquarks at LHC
• A possible interpretation for X(6900) observed in four-muon final state by LHCb -- A light Higgs-like boson?

Related

• Spectroscopy and decays of the fully-heavy tetraquarks
• Fully heavy tetraquark states with diquark-antidiquark configuration
• Mass Spectra of Full-Heavy and Double-Heavy Tetraquark States in the Conventional Quark Model
• Fully-charm tetraquarks: cccc
• Mass-spectra of light-heavy tetraquarks