Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/109129
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Cardoso, Marco | - |
dc.contributor.author | Rupp, George | - |
dc.contributor.author | van Beveren, Eef | - |
dc.date.accessioned | 2023-09-28T11:14:55Z | - |
dc.date.available | 2023-09-28T11:14:55Z | - |
dc.date.issued | 2015 | - |
dc.identifier.issn | 1434-6044 | pt |
dc.identifier.issn | 1434-6052 | pt |
dc.identifier.uri | https://hdl.handle.net/10316/109129 | - |
dc.description.abstract | A recent quark-model description of X (3872) as an unquenched 2 3P1 (Formula Presented) state is generalised by now including all relevant meson–meson configurations, in order to calculate the widths of the experimentally observed electromagnetic decays X (3872) → γ J/ ψ and X(3872) → γ ψ (2S). Interestingly, the inclusion of additional two-meson channels, most importantly D ± D ⋆ ∓, leads to a sizeable increase of the (Formula Presented) probability in the total wave function, although the (Formula Presented) component remains the dominant one. As for the electromagnetic decays, unquenching strongly reduces the γ ψ (2S) decay rate; yet it even more sharply enhances the γ J/ψ rate, resulting in a decay ratio compatible with one experimental observation but in slight disagreement with two others. Nevertheless, the results show a dramatic improvement as compared to a quenched calculation with the same confinement force and parameters. Concretely, we obtain Γ(X(3872) →γ ψ(2S) = 28.9 keV and ΓX(3872)→ γJ/ψ = 24.7 keV, with branching ratio R γ ψ = 1.17. | pt |
dc.language.iso | eng | pt |
dc.publisher | Springer Nature | pt |
dc.rights | openAccess | pt |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | pt |
dc.title | Unquenched quark-model calculation of X (3872) electromagnetic decays | pt |
dc.type | article | - |
degois.publication.firstPage | 26 | pt |
degois.publication.issue | 1 | pt |
degois.publication.title | European Physical Journal C | pt |
dc.peerreviewed | yes | pt |
dc.identifier.doi | 10.1140/epjc/s10052-014-3254-z | pt |
degois.publication.volume | 75 | pt |
dc.date.embargo | 2015-01-01 | * |
uc.date.periodoEmbargo | 0 | pt |
item.fulltext | Com Texto completo | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.languageiso639-1 | en | - |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais |
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File | Description | Size | Format | |
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Unquenched-quarkmodel-calculation-of--X-3872-electromagnetic-decaysEuropean-Physical-Journal-C.pdf | 372.7 kB | Adobe PDF | View/Open |
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