Searching for signals of an exotic I = 1,JP = 2+ state of D⁎K⁎ nature and the structure of the Pc(4312) in the Λb→Σc++D−K− reaction
This paper investigates the decay process Λb→Σc++D−K− with the objective of finding a predicted molecular state with isospin I=1, JP=2+ of D⁎K⁎ nature, plus finding support for the Pc(4312) state as made out of ΣcD¯. The mass distribution of the D−K− system shows distinct features as a consequence o...
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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 |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269325000541 |
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| Summary: | This paper investigates the decay process Λb→Σc++D−K− with the objective of finding a predicted molecular state with isospin I=1, JP=2+ of D⁎K⁎ nature, plus finding support for the Pc(4312) state as made out of ΣcD¯. The mass distribution of the D−K− system shows distinct features as a consequence of the existence of this 2+ state, while the ΣcD¯ distribution exhibits a significant peak near the threshold, much bigger than phase space expectations, which is linked to our assumed ΣcD¯ nature of the Pc(4312) state below the ΣcD¯ threshold. The reaction has been measured at LHCb Collaboration, but only the branching ratio is measured. The present study shows that much valuable information can be obtained about the predicted 2+ Tcs¯(2834) of D⁎K⁎ nature and the Pc(4312) states from the measurements of the mass distributions in this reaction, which will be accessible in the planned updates of LHCb. |
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| ISSN: | 0370-2693 |