{"title":"作为强子分子的 Ω(2012)","authors":"Ju-Jun Xie, Li-Sheng Geng","doi":"10.1088/0256-307x/41/8/081402","DOIUrl":null,"url":null,"abstract":"Recently, a new excited baryon state, <italic toggle=\"yes\">Ω</italic>(2012), was observed in the invariant mass spectra of <inline-formula><tex-math>\n<?CDATA ${K}^{-}{\\varXi }^{0}$?>\n</tex-math>\n<mml:math overflow=\"scroll\"><mml:mrow><mml:msup><mml:mi>K</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:msup><mml:mi>Ξ</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:mrow></mml:math>\n<inline-graphic xlink:href=\"cpl_41_8_081402_ieqn1.gif\"></inline-graphic></inline-formula> and <inline-formula><tex-math>\n<?CDATA ${K}_{S}^{0}{\\varXi }^{-}$?>\n</tex-math>\n<mml:math overflow=\"scroll\"><mml:mrow><mml:msubsup><mml:mi>K</mml:mi><mml:mi>S</mml:mi><mml:mn>0</mml:mn></mml:msubsup><mml:msup><mml:mi>Ξ</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:mrow></mml:math>\n<inline-graphic xlink:href=\"cpl_41_8_081402_ieqn2.gif\"></inline-graphic></inline-formula> by the Belle collaboration. This state has a narrow width (∼ 6 MeV) compared to other baryon states with a similar mass. Here, we provide a mini-review on the <italic toggle=\"yes\">Ω</italic>(2012) state from the molecular perspective, where it appears to be a dynamically generated state with spin-parity 3/2<sup>−</sup> from the coupled-channels interactions of the <inline-formula><tex-math>\n<?CDATA $\\bar{K}\\varXi (1530)$?>\n</tex-math>\n<mml:math overflow=\"scroll\"><mml:mrow><mml:mover accent=\"true\"><mml:mi>K</mml:mi><mml:mo stretchy=\"false\">¯</mml:mo></mml:mover><mml:mi>Ξ</mml:mi><mml:mo stretchy=\"false\">(</mml:mo><mml:mn>1530</mml:mn><mml:mo stretchy=\"false\">)</mml:mo></mml:mrow></mml:math>\n<inline-graphic xlink:href=\"cpl_41_8_081402_ieqn3.gif\"></inline-graphic></inline-formula> and <italic toggle=\"yes\">ηΩ</italic> in <italic toggle=\"yes\">s</italic>-wave and <inline-formula><tex-math>\n<?CDATA $\\bar{K}\\varXi $?>\n</tex-math>\n<mml:math overflow=\"scroll\"><mml:mrow><mml:mover accent=\"true\"><mml:mi>K</mml:mi><mml:mo stretchy=\"false\">¯</mml:mo></mml:mover><mml:mi>Ξ</mml:mi></mml:mrow></mml:math>\n<inline-graphic xlink:href=\"cpl_41_8_081402_ieqn4.gif\"></inline-graphic></inline-formula> in <italic toggle=\"yes\">d</italic>-wave. Additionally, alternative explanations for the <italic toggle=\"yes\">Ω</italic>(2012) resonance are also discussed.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"25 1","pages":""},"PeriodicalIF":3.5000,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The Ω(2012) as a Hadronic Molecule\",\"authors\":\"Ju-Jun Xie, Li-Sheng Geng\",\"doi\":\"10.1088/0256-307x/41/8/081402\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Recently, a new excited baryon state, <italic toggle=\\\"yes\\\">Ω</italic>(2012), was observed in the invariant mass spectra of <inline-formula><tex-math>\\n<?CDATA ${K}^{-}{\\\\varXi }^{0}$?>\\n</tex-math>\\n<mml:math overflow=\\\"scroll\\\"><mml:mrow><mml:msup><mml:mi>K</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:msup><mml:mi>Ξ</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:mrow></mml:math>\\n<inline-graphic xlink:href=\\\"cpl_41_8_081402_ieqn1.gif\\\"></inline-graphic></inline-formula> and <inline-formula><tex-math>\\n<?CDATA ${K}_{S}^{0}{\\\\varXi }^{-}$?>\\n</tex-math>\\n<mml:math overflow=\\\"scroll\\\"><mml:mrow><mml:msubsup><mml:mi>K</mml:mi><mml:mi>S</mml:mi><mml:mn>0</mml:mn></mml:msubsup><mml:msup><mml:mi>Ξ</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:mrow></mml:math>\\n<inline-graphic xlink:href=\\\"cpl_41_8_081402_ieqn2.gif\\\"></inline-graphic></inline-formula> by the Belle collaboration. This state has a narrow width (∼ 6 MeV) compared to other baryon states with a similar mass. Here, we provide a mini-review on the <italic toggle=\\\"yes\\\">Ω</italic>(2012) state from the molecular perspective, where it appears to be a dynamically generated state with spin-parity 3/2<sup>−</sup> from the coupled-channels interactions of the <inline-formula><tex-math>\\n<?CDATA $\\\\bar{K}\\\\varXi (1530)$?>\\n</tex-math>\\n<mml:math overflow=\\\"scroll\\\"><mml:mrow><mml:mover accent=\\\"true\\\"><mml:mi>K</mml:mi><mml:mo stretchy=\\\"false\\\">¯</mml:mo></mml:mover><mml:mi>Ξ</mml:mi><mml:mo stretchy=\\\"false\\\">(</mml:mo><mml:mn>1530</mml:mn><mml:mo stretchy=\\\"false\\\">)</mml:mo></mml:mrow></mml:math>\\n<inline-graphic xlink:href=\\\"cpl_41_8_081402_ieqn3.gif\\\"></inline-graphic></inline-formula> and <italic toggle=\\\"yes\\\">ηΩ</italic> in <italic toggle=\\\"yes\\\">s</italic>-wave and <inline-formula><tex-math>\\n<?CDATA $\\\\bar{K}\\\\varXi $?>\\n</tex-math>\\n<mml:math overflow=\\\"scroll\\\"><mml:mrow><mml:mover accent=\\\"true\\\"><mml:mi>K</mml:mi><mml:mo stretchy=\\\"false\\\">¯</mml:mo></mml:mover><mml:mi>Ξ</mml:mi></mml:mrow></mml:math>\\n<inline-graphic xlink:href=\\\"cpl_41_8_081402_ieqn4.gif\\\"></inline-graphic></inline-formula> in <italic toggle=\\\"yes\\\">d</italic>-wave. Additionally, alternative explanations for the <italic toggle=\\\"yes\\\">Ω</italic>(2012) resonance are also discussed.\",\"PeriodicalId\":10344,\"journal\":{\"name\":\"Chinese Physics Letters\",\"volume\":\"25 1\",\"pages\":\"\"},\"PeriodicalIF\":3.5000,\"publicationDate\":\"2024-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Chinese Physics Letters\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://doi.org/10.1088/0256-307x/41/8/081402\",\"RegionNum\":2,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"PHYSICS, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chinese Physics Letters","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1088/0256-307x/41/8/081402","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
Recently, a new excited baryon state, Ω(2012), was observed in the invariant mass spectra of K−Ξ0 and KS0Ξ− by the Belle collaboration. This state has a narrow width (∼ 6 MeV) compared to other baryon states with a similar mass. Here, we provide a mini-review on the Ω(2012) state from the molecular perspective, where it appears to be a dynamically generated state with spin-parity 3/2− from the coupled-channels interactions of the K¯Ξ(1530) and ηΩ in s-wave and K¯Ξ in d-wave. Additionally, alternative explanations for the Ω(2012) resonance are also discussed.
期刊介绍：
Chinese Physics Letters provides rapid publication of short reports and important research in all fields of physics and is published by the Chinese Physical Society and hosted online by IOP Publishing.
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