2022/10/28 by Tan, Yue, Liu, Xuejie, Chen, Xiaoyun +2
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)
paper · doi:10.48550/arxiv.2210.16250
Recently, Belle\uppercase\expandafter\romannumeral2 Collaboration firstly reported a new resonance ωχbJ in the processes of e+e- → ωχbJ at center-of-mass energies √(s)=10.745 GeV. Given the Born cross section similar with the previously reported Υ(10753), the new resonance ωχbJ may have be Υ(10753). From the perspectives of traditional Υ(nS) meson and exotic tetraquark bqqb state with the JPC = 1--, we tentatively investigate the Υ(10753) by solving Schrödinger equation in the framework of the chiral quark model. Numerical results for the meson show that the mass of Υ(5S) is up to 10.86 GeV and unsuitable for the candidate of Υ(10753). On the other hand, not only the two kinds of molecular structure (bb-qq, bq-qb) but also the \da~structure (bq-qb) are considered into our tetraquark calculation with the help of Gaussian expansion method. When a fully-channel coupling is performed using the real-scaling method (stabilization method), we get a stable resonance 1R1(10770) ( 2S+1RJ ) with a great component of the diquark-antidiquark state. Combined with the mass and width of 1R1(10770), it may be a good candidate for experimental Υ(10753). Besides, several resonance states ranging from 10.82 GeV to 10.96 GeV are obtained, which are expected to be further verified in future experiments.