Unquenched quark-model calculation of ... electromagnetic decays

(ProQuest: ... denotes formulae and/or non-USASCII text omitted; see image).A recent quark-model description of ... as an unquenched ... ... state is generalised by now including all relevant meson-meson configurations, in order to calculate the widths of the experimentally observed electromagnetic...

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Published inThe European physical journal. C, Particles and fields Vol. 75; no. 1; pp. 1 - 10
Main Authors Cardoso, Marco, Rupp, George, Beveren, Eef
Format Journal Article
LanguageEnglish
Published 01.01.2015
Subjects
Channels
Confinement
Decay
Decay rate
Mathematical analysis
Quenching (cooling)
Texts
Wave functions
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Summary:(ProQuest: ... denotes formulae and/or non-USASCII text omitted; see image).A recent quark-model description of ... as an unquenched ... ... state is generalised by now including all relevant meson-meson configurations, in order to calculate the widths of the experimentally observed electromagnetic decays ... and ... Interestingly, the inclusion of additional two-meson channels, most importantly ..., leads to a sizeable increase of the ... probability in the total wave function, although the ... component remains the dominant one. As for the electromagnetic decays, unquenching strongly reduces the ... decay rate; yet it even more sharply enhances the ... 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 ... keV and ... keV, with branching ratio ...
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ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-014-3254-z