| Autor: |
Lin-Qing Song, Dan Song, Jun-Tao Zhu, Jun He |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Physics Letters B, Vol 835, Iss , Pp 137586- (2022) |
| Druh dokumentu: |
article |
| ISSN: |
0370-2693 |
| DOI: |
10.1016/j.physletb.2022.137586 |
| Popis: |
In this work, a study of possible molecular states from the ΛcΛ¯c interaction and their productions in nucleon-antinucleon collision is performed in a quasipotential Bethe-Salpeter equation approach. Two bound states with quantum numbers JPC=0−+ and 1−− are produced with almost the same binding energy from the ΛcΛ¯c interaction which is described by the light meson exchanges. However, the result does not support the assignment of experimentally observed Y(4630) as a ΛcΛ¯c molecular state because it is hard to obtain a peak near experimental mass of the Y(4630) which is far above the ΛcΛ¯c threshold. The possibility to search these states in nucleon-antinucleon collision is studied by including couplings to NN¯ and D(⁎)D¯(⁎) channels. The peaks can be found obviously near the ΛcΛ¯c threshold in the D⁎D¯⁎ channel at an order of amplitude of 10 μb. Too small width of state with 0−+ may lead to the difficulty to be observed in experiment. Based on the results in the current work, search for the ΛcΛ¯c molecular state with 1−− is suggested in process NN¯→D⁎D¯⁎, which is accessible at P¯ANDA. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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Full Text from ScienceDirect