Production of possible ΣcΣ¯c molecular states in nucleon-antinucleon collision
In this study, we investigate the production of potential ΣcΣ¯c molecular states in nucleon-antinucleon collisions using a quasipotential Bethe-Salpeter equation approach. Both isoscalar and isovector bound states with quantum numbers JPC=0−+ and 1−− are generated from the ΣcΣ¯c interaction, which i...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-02-01
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| Series: | Physics Letters B |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269325000127 |
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| Summary: | In this study, we investigate the production of potential ΣcΣ¯c molecular states in nucleon-antinucleon collisions using a quasipotential Bethe-Salpeter equation approach. Both isoscalar and isovector bound states with quantum numbers JPC=0−+ and 1−− are generated from the ΣcΣ¯c interaction, which is modeled through the exchange of light mesons. The cross-section for the scattering process pp¯→pp¯ is calculated with annihilation effects taken into account, and the results are consistent with experimental data. However, no significant structures related to the ΣcΣ¯c state are observed in this process. Using the parameters determined from this analysis, we also investigate the reaction pp¯→ΛcΛ¯c, predicting a cross-section on the order of 10 pb with a dip near the ΣcΣ¯c threshold. We present the poles of four molecular states, noting that the state 0(1−−) exhibits a width much larger than those of the other three states, albeit still very small. For the isoscalar bound state with quantum numbers I(JPC)=0(1−−), a clear dip is observed near the ΣcΣ¯c threshold in the ΛcΛ¯c channel, with a cross-section on the order of 1 pb. Although a dip is also identified in the ΛcΛ¯c channel for the bound state with quantum numbers I(JPC)=0(0−+), it exhibits a very narrow width and a smaller cross-section, suggesting that highly precise experiments would be necessary to detect it. No significant structures are observed in the NN¯ final state for any of the four studied states. Based on these findings, we propose searching for the ΣcΣ¯c molecular state with I(JPC)=0(1−−) in the process NN¯→ΛcΛ¯c, which is accessible at P¯ANDA. |
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| ISSN: | 0370-2693 |