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Experimental constraints on the properties of Pc states
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E. S. Swanson
The European Physical Journal A, Volume: 58, Issue: 4
Swansea University Author:
Timothy Burns
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DOI (Published version): 10.1140/epja/s10050-022-00723-9
Abstract
Using new experimental data on photoproduction and Λ0b decays, we derive constraints on the properties of the LHCb Pc states. We conclude that Pc(4312), Pc(4380) and Pc(4440) can be described as ΣcD¯, Σ∗cD¯ and ΣcD¯∗ molecules, but that Pc(4457) does not fit into the same picture. Based on the appar...
| Published in: | The European Physical Journal A |
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| ISSN: | 1434-601X |
| Published: |
Springer Science and Business Media LLC
2022
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa60159 |
| Abstract: |
Using new experimental data on photoproduction and Λ0b decays, we derive constraints on the properties of the LHCb Pc states. We conclude that Pc(4312), Pc(4380) and Pc(4440) can be described as ΣcD¯, Σ∗cD¯ and ΣcD¯∗ molecules, but that Pc(4457) does not fit into the same picture. Based on the apparent absence of additional partner states, and the striking disparity between Λ+cD¯0 and Λ+cD¯∗0 decays, we conclude that Pc(4440) has 3/2− quantum numbers. Using heavy-quark symmetry we predict large experimental signals for Pc states in ηcpK−, Λ+cD¯∗0K−, and Σ(∗)cD¯K−. We also argue that current experimental data on photoproduction is almost at the level of sensitivity required to observe Pc states. |
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| College: |
Faculty of Science and Engineering |
| Funders: |
Swanson’s research was supported by the U.S. Department of Energy under contract DE-SC0019232 |
| Issue: |
4 |