| Texto completo | |
| Autor(es): |
Kim, Sang-Ho
[1]
;
Khemchandani, K. P.
[2]
;
Torres, A. Martinez
[3]
;
Nam, Seung-il
[1, 4]
;
Hosaka, Atsushi
[5, 6]
Número total de Autores: 5
|
| Afiliação do(s) autor(es): | [1] Pukyong Natl Univ PKNU, Dept Phys, Busan 48513 - South Korea
[2] Univ Fed Sao Paulo, BR-01302907 Sao Paulo - Brazil
[3] Univ Sao Paulo, Inst Fis, BR-05389970 Sao Paulo - Brazil
[4] Asia Pacific Ctr Theoret Phys APCTP, Pohang 37673 - South Korea
[5] Osaka Univ, Res Ctr Nucl Phys RCNP, Ibaraki, Osaka 5670047 - Japan
[6] Japan Atom Energy Agcy JAEA, Adv Sci Res Ctr, Tokai, Ibaraki 3191195 - Japan
Número total de Afiliações: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Physical Review D; v. 103, n. 11 JUN 21 2021. |
| Citações Web of Science: | 0 |
| Resumo | |
We study the photoproduction of the Lambda(1405) and Sigma(1400) hyperon resonances, the latter of which is not a well established state. We evaluate the s-, t-, and u-channel diagrams in the Born approximation by employing the effective Lagrangians. A new ingredient is the inclusion of a nucleon resonance N{*} (1895) that is dynamically generated with predictions for its coupling to the K Sigma(1405) and K Sigma(1400) channels. To extend the applicability of the model to energies beyond the threshold region, we consider a Regge model for the t-channel K- and K{*} -exchanges. Our results are in good agreement with the CLAS data available on Lambda(1405), while for Sigma(1400) we predict observables for its production. We also provide polarization observables for both hyperon productions, which can be useful in future experimental investigations. The present study provides new information on the nucleon resonance N{*}(1895) which can be an alternative source for generating the hyperon resonances Lambda(1405) and Sigma(1400). (AU) | |
| Processo FAPESP: | 19/17149-3 - Enfrentando problemas de física de hádrons com teorias de campos efetivas |
| Beneficiário: | Alberto Martinez Torres |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 19/16924-3 - Propriedades e interações dos hádrons |
| Beneficiário: | Kanchan Pradeepkumar Khemchandani |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |