The spectra of $$p\bar{\Lambda }$$ p Λ ¯ and $$p\bar{\Sigma }$$ p Σ ¯ hexaquark states
Abstract Motivated by the recent observation of the $$J^P = 1^+$$ J P = 1 + resonance X(2085) in the $$p\bar{\Lambda }$$ p Λ ¯ system by the BESIII collaboration, we study the molecular states of $$p\bar{\Lambda }$$ p Λ ¯ and $$p\bar{\Sigma }$$ p Σ ¯ with baryon-antibaryon structures within the fram...
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SpringerOpen
2025-06-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-025-14356-x |
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| author | Xuan-Heng Zhang Sheng-Qi Zhang Cong-Feng Qiao |
| author_facet | Xuan-Heng Zhang Sheng-Qi Zhang Cong-Feng Qiao |
| author_sort | Xuan-Heng Zhang |
| collection | DOAJ |
| description | Abstract Motivated by the recent observation of the $$J^P = 1^+$$ J P = 1 + resonance X(2085) in the $$p\bar{\Lambda }$$ p Λ ¯ system by the BESIII collaboration, we study the molecular states of $$p\bar{\Lambda }$$ p Λ ¯ and $$p\bar{\Sigma }$$ p Σ ¯ with baryon-antibaryon structures within the framework of the QCD sum rules. Non-perturbative contributions up to dimension 13 in quark operator expansion (OPE) are considered. Our calculation results indicate the possible existence of six $$p\bar{\Lambda }$$ p Λ ¯ and $$p\bar{\Sigma }$$ p Σ ¯ molecular states with quantum numbers $$J^{P}=0^{-}, 0^{+}, 1^{-}$$ J P = 0 - , 0 + , 1 - , which do not support X(2085), or at least not its main component, being a $$p\bar{\Lambda }$$ p Λ ¯ or $$p\bar{\Sigma }$$ p Σ ¯ molecular state. Additionally, the previously observed state X(2075) also lies in the vicinity of $$p\bar{\Lambda }$$ p Λ ¯ and $$p\bar{\Sigma }$$ p Σ ¯ molecular states, and its inner structure might not be entirely transparent, rather possibly a mixture of tetraquark and hexaquark states. The possible decay modes of the concerned states are analyzed. |
| format | Article |
| id | doaj-art-db1a589e2a1f4ed5b89c41bf81dafd06 |
| institution | Matheson Library |
| issn | 1434-6052 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | SpringerOpen |
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| series | European Physical Journal C: Particles and Fields |
| spelling | doaj-art-db1a589e2a1f4ed5b89c41bf81dafd062025-06-29T11:15:59ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522025-06-0185611810.1140/epjc/s10052-025-14356-xThe spectra of $$p\bar{\Lambda }$$ p Λ ¯ and $$p\bar{\Sigma }$$ p Σ ¯ hexaquark statesXuan-Heng Zhang0Sheng-Qi Zhang1Cong-Feng Qiao2School of Physical Sciences, University of Chinese Academy of SciencesSchool of Physical Sciences, University of Chinese Academy of SciencesSchool of Physical Sciences, University of Chinese Academy of SciencesAbstract Motivated by the recent observation of the $$J^P = 1^+$$ J P = 1 + resonance X(2085) in the $$p\bar{\Lambda }$$ p Λ ¯ system by the BESIII collaboration, we study the molecular states of $$p\bar{\Lambda }$$ p Λ ¯ and $$p\bar{\Sigma }$$ p Σ ¯ with baryon-antibaryon structures within the framework of the QCD sum rules. Non-perturbative contributions up to dimension 13 in quark operator expansion (OPE) are considered. Our calculation results indicate the possible existence of six $$p\bar{\Lambda }$$ p Λ ¯ and $$p\bar{\Sigma }$$ p Σ ¯ molecular states with quantum numbers $$J^{P}=0^{-}, 0^{+}, 1^{-}$$ J P = 0 - , 0 + , 1 - , which do not support X(2085), or at least not its main component, being a $$p\bar{\Lambda }$$ p Λ ¯ or $$p\bar{\Sigma }$$ p Σ ¯ molecular state. Additionally, the previously observed state X(2075) also lies in the vicinity of $$p\bar{\Lambda }$$ p Λ ¯ and $$p\bar{\Sigma }$$ p Σ ¯ molecular states, and its inner structure might not be entirely transparent, rather possibly a mixture of tetraquark and hexaquark states. The possible decay modes of the concerned states are analyzed.https://doi.org/10.1140/epjc/s10052-025-14356-x |
| spellingShingle | Xuan-Heng Zhang Sheng-Qi Zhang Cong-Feng Qiao The spectra of $$p\bar{\Lambda }$$ p Λ ¯ and $$p\bar{\Sigma }$$ p Σ ¯ hexaquark states European Physical Journal C: Particles and Fields |
| title | The spectra of $$p\bar{\Lambda }$$ p Λ ¯ and $$p\bar{\Sigma }$$ p Σ ¯ hexaquark states |
| title_full | The spectra of $$p\bar{\Lambda }$$ p Λ ¯ and $$p\bar{\Sigma }$$ p Σ ¯ hexaquark states |
| title_fullStr | The spectra of $$p\bar{\Lambda }$$ p Λ ¯ and $$p\bar{\Sigma }$$ p Σ ¯ hexaquark states |
| title_full_unstemmed | The spectra of $$p\bar{\Lambda }$$ p Λ ¯ and $$p\bar{\Sigma }$$ p Σ ¯ hexaquark states |
| title_short | The spectra of $$p\bar{\Lambda }$$ p Λ ¯ and $$p\bar{\Sigma }$$ p Σ ¯ hexaquark states |
| title_sort | spectra of p bar lambda p λ ¯ and p bar sigma p σ ¯ hexaquark states |
| url | https://doi.org/10.1140/epjc/s10052-025-14356-x |
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