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| Título: | Eta photoproduction as a test of the extended chiral symmetry |
| Autor: | Fernández-Ramírez, César  ; Moya de Guerra, Elvira ; Udías, J.M. |
| Palabras clave: | Extended chiral symmetry Eta photoproduction [PACS] Chiral symmetries [PACS] Meson production [PACS] Baryon resonances with S=0 [PACS] Photoproduction reactions |
| Fecha de publicación: | 27-jun-2007 |
| Editor: | Elsevier |
| Citación: | Physics Letters B 651(5-6): 369–373 (2007) |
| Resumen: | We analyze the γp→ηp process from threshold up to 1.2 GeV, employing an effective Lagrangian approach that allows for a mixing of eta couplings of pseudoscalar and pseudovector nature. The mixing ratio of the couplings may serve as a quantitative estimation of the SUL(3)×SUR(3) extended chiral symmetry violation in this energy regime. The data analyzed (differential cross sections and asymmetries) show a preference for the pseudoscalar coupling—91% of pseudoscalar coupling component for the best fit. We stress that a more conclusive answer to this question requires a more complete electromagnetic multipole database than the presently available one. |
| Descripción: | 5 pages, 1 table, 3 figures.--PACS nrs.: 11.30.Rd; 13.60.Le; 14.20.Gk; 25.20.Lj.--Printed version published on August 9, 2007.--ArXiv pre-print available at: http://arxiv.org/abs/0706.0616v1 |
| Versión del editor: | http://dx.doi.org/10.1016/j.physletb.2007.06.049 |
| URI: | http://hdl.handle.net/10261/15943 |
| DOI: | 10.1016/j.physletb.2007.06.049 |
| ISSN: | 0370-2693 |
| Aparece en las colecciones: | (CFMAC-IEM) Artículos |
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