Strong decays of baryons and missing resonances
| Autor: | H. García-Tecocoatzi, Elena Santopinto, Roelof Bijker, Jacopo Ferretti, Giuseppe Galatà |
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| Rok vydání: | 2016 |
| Předmět: |
Quark
Physics Particle physics Meson 010308 nuclear & particles physics Nuclear Theory High Energy Physics::Phenomenology Quark model FOS: Physical sciences Strangeness Lambda baryon 01 natural sciences Pseudoscalar meson Xi baryon Baryon High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) 0103 physical sciences High Energy Physics::Experiment Nuclear Experiment 010306 general physics |
| Zdroj: | Physical Review D. 94 |
| ISSN: | 2470-0029 2470-0010 |
| Popis: | We provide results for the open-flavor strong decays of strange and nonstrange baryons into a baryon-vector/pseudoscalar meson pair. The decay amplitudes are computed in the ${^{3}P}_{0}$ pair-creation model, where $s\overline{s}$ pair-creation suppression is included for the first time in the baryon sector, in combination with the $U(7)$ and hypercentral models. The effects of this $s\overline{s}$ suppression mechanism cannot be reabsorbed in a redefinition of the model parameters or in a different choice of the ${^{3}P}_{0}$ model vertex factor. Our results for the decay amplitudes are compared with the existing experimental data and previous ${^{3}P}_{0}$ and elementary meson emission model calculations. In this respect, we show that distinct quark models differ in the number of missing resonances they predict and also in the quantum numbers of states. Therefore, future experimental results will be important in order to disentangle different models of baryon structure. Finally, in the appendixes, we provide some details of our calculations, including the derivation of all relevant flavor couplings with strangeness suppression. This derivation may be helpful to calculate the open-flavor decay amplitudes starting from other models of baryons. |
| Databáze: | OpenAIRE |
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