$Z_c$ and $Z_{cs}$ systems with operator mixing at NLO in QCD sum rules ...
arXiv, 2023
academicJournal
Zugriff:
We study the mass spectra of hidden-charm tetraquark systems with quantum numbers $(I^G)J^P=(1^+)1^+$ using QCD sum rules. The analysis incorporates the complete next-to-leading order (NLO) contribution to the perturbative QCD part of the operator product expansions, with particular attention to operator mixing effects due to renormalization group evolution. For the $\bar{d}c\bar{c}u$ system, the masses of two mixed operators, $J_{1,5}^{\text{Mixed}}$ and $J_{2,6}^{\text{Mixed}}$, are determined to be $3.89^{+0.18}_{-0.12}$ GeV and $4.03^{+0.06}_{-0.07}$ GeV, respectively, closely matching those of $Z_c$(3900) and $Z_c(4020)$. Similarly, for the $\bar{s}c\bar{c}u$ states, the masses of $J_{1,5}^{\text{Mixed}}$ and $J_{2,6}^{\text{Mixed}}$ are found to be $4.02^{+0.17}_{-0.09}$ GeV and $4.21^{+0.08}_{-0.07}$ GeV, respectively, in close proximity to $Z_{cs}$(3983)/$Z_{cs}$(4000) and $Z_{cs}$(4220), consistent with the expectation that they are the partners of $Z_c$(3900) and $Z_c$(4020). Our results highlight ... : 49 pages, 32 fugures. arXiv admin note: substantial text overlap with arXiv:2201.11714 ...
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$Z_c$ and $Z_{cs}$ systems with operator mixing at NLO in QCD sum rules ...
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Autor/in / Beteiligte Person: | Wua, Ren-Hua ; Wang, Chen-Yu ; Meng, Ce ; Ma, Yan-Qing ; Chao, Kuang-Ta |
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Veröffentlichung: | arXiv, 2023 |
Medientyp: | academicJournal |
DOI: | 10.48550/arxiv.2312.14224 |
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