Production of 1−+ exotic charmonium-like states in electron-positron collisions
The absence of observed charmonium-like states with the exotic quantum numbers JPC=1−+ has prompted us to investigate the production rates of the 1−+ DD‾1(2420) and D⁎D‾1(2420) hadronic molecules, which we refer to as ηc1 and ηc1′, respectively, in electron-positron collisions. Assuming a hadronic m...
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Elsevier
2025-08-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269325003648 |
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| author | Xiao-Yu Zhang Pan-Pan Shi Feng-Kun Guo |
| author_facet | Xiao-Yu Zhang Pan-Pan Shi Feng-Kun Guo |
| author_sort | Xiao-Yu Zhang |
| collection | DOAJ |
| description | The absence of observed charmonium-like states with the exotic quantum numbers JPC=1−+ has prompted us to investigate the production rates of the 1−+ DD‾1(2420) and D⁎D‾1(2420) hadronic molecules, which we refer to as ηc1 and ηc1′, respectively, in electron-positron collisions. Assuming a hadronic molecular nature for the vector charmonium-like states ψ(4360) and ψ(4415), we evaluate the radiative decay widths of ψ(4360)→γηc1 and ψ(4415)→γηc1′. Using these decay widths, we estimate the cross sections for producing ηc1 and ηc1′ in electron-positron annihilations, as well as the event numbers at the planned Super τ-Charm Facility. Our results suggest that the ideal energy region for observing these states is around 4.44 and 4.50 GeV, just above the D⁎D‾1(2420) and D⁎D‾2⁎(2460) thresholds, respectively. |
| format | Article |
| id | doaj-art-bf92bf0ae86a439b8df7a56d517e3d7f |
| institution | DOAJ |
| issn | 0370-2693 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj-art-bf92bf0ae86a439b8df7a56d517e3d7f2025-08-20T03:07:24ZengElsevierPhysics Letters B0370-26932025-08-0186713960310.1016/j.physletb.2025.139603Production of 1−+ exotic charmonium-like states in electron-positron collisionsXiao-Yu Zhang0Pan-Pan Shi1Feng-Kun Guo2Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China; School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, ChinaInstituto de Física Corpuscular (centro mixto CSIC-UV), Institutos de Investigación de Paterna, Apartado 22085, 46071, Valencia, Spain; Corresponding author.Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China; School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China; Peng Huanwu Collaborative Center for Research and Education, Beihang University, Beijing 100191, China; Southern Center for Nuclear-Science Theory (SCNT), Institute of Modern Physics, Chinese Academy of Sciences, Huizhou 516000, ChinaThe absence of observed charmonium-like states with the exotic quantum numbers JPC=1−+ has prompted us to investigate the production rates of the 1−+ DD‾1(2420) and D⁎D‾1(2420) hadronic molecules, which we refer to as ηc1 and ηc1′, respectively, in electron-positron collisions. Assuming a hadronic molecular nature for the vector charmonium-like states ψ(4360) and ψ(4415), we evaluate the radiative decay widths of ψ(4360)→γηc1 and ψ(4415)→γηc1′. Using these decay widths, we estimate the cross sections for producing ηc1 and ηc1′ in electron-positron annihilations, as well as the event numbers at the planned Super τ-Charm Facility. Our results suggest that the ideal energy region for observing these states is around 4.44 and 4.50 GeV, just above the D⁎D‾1(2420) and D⁎D‾2⁎(2460) thresholds, respectively.http://www.sciencedirect.com/science/article/pii/S0370269325003648 |
| spellingShingle | Xiao-Yu Zhang Pan-Pan Shi Feng-Kun Guo Production of 1−+ exotic charmonium-like states in electron-positron collisions Physics Letters B |
| title | Production of 1−+ exotic charmonium-like states in electron-positron collisions |
| title_full | Production of 1−+ exotic charmonium-like states in electron-positron collisions |
| title_fullStr | Production of 1−+ exotic charmonium-like states in electron-positron collisions |
| title_full_unstemmed | Production of 1−+ exotic charmonium-like states in electron-positron collisions |
| title_short | Production of 1−+ exotic charmonium-like states in electron-positron collisions |
| title_sort | production of 1 exotic charmonium like states in electron positron collisions |
| url | http://www.sciencedirect.com/science/article/pii/S0370269325003648 |
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