Newly observed T(10753) as a tetraquark state in a chiral quark model with scalar nonet exchange

This study investigates the resonance & omega;& chi;bJ, recently discovered in e+e- collisions with a center-of-mass energy of ffis ffi p = 10.745 GeV and reported by the Belle II Collaboration, to explore its potential identification with the previously reported T(10753). We consider both the traditional T(nS) meson and the exotic tetraquark bq over bar qb over bar state with JP = 1-, employing the chiral quark model to solve the Schrodinger equation. Our calculations demonstrate that the mass of T(5S), T(4S), and T(3D), as potential two-quark state candidates, are inconsistent with the experimentally observed T(10753), effectively excluding the possibility of T(10753) as a two-quark state in our model. Furthermore, we employ the Gaussian expansion method to investigate the tetraquark structure of the resonance, including two molecular structures (bb over bar -qq over bar , bq over bar -qb over bar ) and a diquark-antidiquark structure (b over bar q over bar -qb), and perform a full -channel coupling using the real-scaling method. Our investigation yields a total of seven resonant states, with one state having an energy of 10761 & PLUSMN; 7 MeV and a width of 10.8 & PLUSMN; 5.2 MeV, which is a promising candidate for the experimentally observed T(10753). Furthermore, we report no resonances in the energy range below 10.6 GeV, while several resonances were found in the 10.8-10.9 GeV range. These findings suggest the need for future experiments to search for additional resonant states in this energy range, potentially providing further support for our model.

Automated summary

This study investigates the resonance ωχbJ discovered in e+e- collisions and explores its potential identification with the previously reported T(10753). The study finds that the mass of T(5S), T(4S), and T(3D) as potential two-quark state candidates are inconsistent with the experimentally observed T(10753). The study also discovers several resonant states, one of which is a promising candidate for T(10753). These findings suggest the need for future experiments to search for additional resonant states in this energy range.