| Texto completo | |
| Autor(es): |
Ramalho, G.
Número total de Autores: 1
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| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW D; v. 102, n. 5, p. 20-pg., 2020-09-15. |
| Resumo | |
In the last years it became possible to measure in HADES the dilepton decays of several baryons. The baryon dilepton decays provide information about the electromagnetic structure of the baryons in the timelike region. In the present work, we study the B' -> e(+)e(-) B decays, where B' is a baryon decuplet member and B is a baryon octet member. Our calculations are based on the covariant spectator quark model, where the contribution of the quark core is complemented with an SU(3) contribution from the pion cloud. The pion cloud contribution prove to be relevant in the range of study. We present predictions for the Sigma(0)(1385) -> e(+)e(-) Lambda (1116) and Sigma(+) (1385) -> e(+)e(-) Sigma(+) (1193) decays, which may be tested at HADES in a near future. Predictions for the remaining decuplet baryon Dalitz decays are also presented. We conclude that different orders of magnitudes are expected for the baryon decuplet Dalitz decay widths, according to the quark content of the baryons. We also conclude that the dependence of the transition form factors on the square momentum transfer (q(2)) is important for some transitions. (AU) | |
| Processo FAPESP: | 17/02684-5 - Estudo da estrutura electromagnética e axial de bárions no vácuo e no meio nuclear |
| Beneficiário: | Gilberto Tomás Ferreira Ramalho |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores |