2024/04/17 by Si-Nuo Li, Li, Si-Nuo, Liang Tang +1
Mathematics · Physics and Astronomy · #Advanced Algebra and Geometry #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2404.11145
openalex publication_date 2024/04/17 · openalex created_date 2024/04/19 · openalex updated_date 2026/07/28
Inspired by the recent experimental progress on the T_cs0a(2900)0/++, the fully open tetraquark spectrum with the configuration of [8]_[cs] ⊗ [8]_[q q^′] is systematically investigated by the QCD sum rules. In this article, we concentrate on the quantum numbers JP=0+/0-/1+/1-. Firstly, we construct four scalar currents (JP=0+) in the form of [8]_[cs] ⊗ [8]_[ud] type tetraquark structure and perform the analysis of the QCD sum rules, where we consider the leading order contributions up to dimension 11 in the operator product expansion and retain contributions linear in the strange quark mass ms. Our results, M0+A = 2.91-0.20+0.20~GeV and M0+C = 2.98-0.21+0.20~GeV, are consistent with the experimentally discovered T_cs0a(2900)++ within error margins. Thus, our calculation supports classifying T_cs0a(2900)++ as a tetraquark state with the [8]_[cs] ⊗ [8]_u d color configuration. Moreover, on the basis of JP=0+, we also study tetraquark states with quantum numbers JP=0-, 1+, and 1-, predicting two new hadronic states awaiting experimental verification for each quantum number. Their masses are as follows: M0-A=3.45-0.10+0.12~GeV, M0-D=3.20-0.19+0.17~GeV, M1+A=2.95-0.19+0.19~GeV, M1+C=2.95-0.19+0.19~GeV, M1-A=3.23-0.10+0.11~GeV and M1-D=3.23-0.11+0.09~GeV. With advances in experimental techniques and accumulation of new data, these predicted results are hoped to be confirmed in future experiments.