{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,17]],"date-time":"2026-01-17T01:41:22Z","timestamp":1768614082868,"version":"3.49.0"},"reference-count":76,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2020,9,28]],"date-time":"2020-09-28T00:00:00Z","timestamp":1601251200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["11835015"],"award-info":[{"award-number":["11835015"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["11947302"],"award-info":[{"award-number":["11947302"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["11961141012"],"award-info":[{"award-number":["11961141012"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["11621131001"],"award-info":[{"award-number":["11621131001"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100002367","name":"Chinese Academy of Sciences","doi-asserted-by":"publisher","award":["XDB34030303"],"award-info":[{"award-number":["XDB34030303"]}],"id":[{"id":"10.13039\/501100002367","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100002367","name":"Chinese Academy of Sciences","doi-asserted-by":"publisher","award":["QYZDB-SSW-SYS013"],"award-info":[{"award-number":["QYZDB-SSW-SYS013"]}],"id":[{"id":"10.13039\/501100002367","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","award":["CRC110"],"award-info":[{"award-number":["CRC110"]}],"id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>We analyze possible singularities in the J\/\u03c8\u039b invariant mass distribution of the \u039eb\u2212\u2192K\u2212J\/\u03c8\u039b process via triangle loop diagrams. Triangle singularities in the physical region are found in 18 different triangle loop diagrams. Among those with \u039e*-charmonium-\u039b intermediate states, the one from the \u03c7c1\u039e(2120)\u039b loop, which is located around 4628 MeV, is found the most likely to cause observable effects. One needs S- and P-waves in \u03c7c1\u039b and J\/\u03c8\u039b systems, respectively, when the quantum numbers of these systems are 1\/2+ or 3\/2+. When the quantum numbers of the \u039e(2120) are JP=1\/2+, 1\/2\u2212 or 3\/2+, the peak structure should be sharper than the other JP choices. This suggests that although the whole strength is unknown, we should pay attention to the contributions from the \u039e*-charmonium-\u039b triangle diagram if structures are observed in the J\/\u03c8\u039b invariant mass spectrum experimentally. In addition, a few triangle diagrams with the Ds1*(2700) as one of the intermediate particles can also produce singularities in the J\/\u03c8\u039b distribution, but at higher energies above 4.9 GeV.<\/jats:p>","DOI":"10.3390\/sym12101611","type":"journal-article","created":{"date-parts":[[2020,9,28]],"date-time":"2020-09-28T10:39:58Z","timestamp":1601289598000},"page":"1611","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":31,"title":["Exploring Possible Triangle Singularities in the                                                                            \u039e                   b                   \u2212                                                   \u2192                                                     K                   \u2212                                  J                 \/                 \u03c8                 \u039b                                                 Decay"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3529-4606","authenticated-orcid":false,"given":"Chao-Wei","family":"Shen","sequence":"first","affiliation":[{"name":"School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3651-5722","authenticated-orcid":false,"given":"Hao-Jie","family":"Jing","sequence":"additional","affiliation":[{"name":"School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China"},{"name":"CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2919-2064","authenticated-orcid":false,"given":"Feng-Kun","family":"Guo","sequence":"additional","affiliation":[{"name":"School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China"},{"name":"CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4583-7691","authenticated-orcid":false,"given":"Jia-Jun","family":"Wu","sequence":"additional","affiliation":[{"name":"School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2020,9,28]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"232001","DOI":"10.1103\/PhysRevLett.105.232001","article-title":"Prediction of narrow N* and \u039b* resonances with hidden charm above 4 GeV","volume":"105","author":"Wu","year":"2010","journal-title":"Phys. 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