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Title: | Eta photoproduction as a test of the extended chiral symmetry |
Authors: | Fernández-Ramírez, César CSIC; Moya de Guerra, Elvira ORCID; Udías, J.M. | Keywords: | Extended chiral symmetry Eta photoproduction [PACS] Chiral symmetries [PACS] Meson production [PACS] Baryon resonances with S=0 [PACS] Photoproduction reactions |
Issue Date: | 27-Jun-2007 | Publisher: | Elsevier | Citation: | Physics Letters B 651(5-6): 369–373 (2007) | Abstract: | 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. | Description: | 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 | Publisher version (URL): | 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 |
Appears in Collections: | (CFMAC-IEM) Artículos |
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