Case in favor of the N*(1700)(3/2(-))
| Autor: | Garzón Alama, Eugenio Javier, Xie, Jujun, Oset, Eulogi |
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| Přispěvatelé: | Ministerio de Economía y Competitividad (España), Generalitat Valenciana |
| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Garzón Alama, Eugenio Javier Xie, J.J. Oset Báguena, Eulogio 2013 Case in favor of the N*(1700)(3/2(-)) Physical Review C 87 5 055204 RODERIC. Repositorio Institucional de la Universitat de Valéncia instname Digital.CSIC. Repositorio Institucional del CSIC |
| Popis: | Using an interaction extracted from the local hidden-gauge Lagrangians, which brings together vector and pseudoscalar mesons, and the coupled channels rho N (s wave), pi N (d wave), pi Delta (s wave), and pi Delta (d wave), we look in the region ofv root s = 1400-1850 MeV and find two resonances dynamically generated by the interaction of these channels, which are naturally associated to N*(1520)(3/2(-)) and N*(1700)(3/2(-)). N*(1700)(3/2(-)) appears neatly as a pole in the complex plane. The free parameters of the theory are chosen to fit the pi N (d-wave) data. Both the real and imaginary parts of the pi N amplitude vanish in our approach in the vicinity of this resonance, which is similar to what happens in experimental determinations and which makes this signal very weak in this channel. This feature could explain why this resonance does not show up in some experimental analyses, but the situation is analogous to that of the f(0)(980) resonance, the second scalar meson after sigma[f(0)(500)] in the pi pi(d-wave) amplitude. The unitary coupled channel approach followed here, in connectionwith the experimental data, leads automatically to a pole in the 1700-MeV region and makes this second 3/2-resonance unavoidable. We thank M. Doring, D. M. Manley, I. I. Strakovsky, D. Bugg, and R. L. Workman for a thorough reading of our paper and valuable comments. This work is partly supported by the Spanish Ministerio de Economia y Competitividad and European FEDER funds under Contract No. FIS2011-28853-C02-01 and the Generalitat Valenciana in the program Prometeo, 2009/090. We acknowledge the support of the European Community Research Infrastructure Integrating Activity Study of Strongly Interacting Matter (acronym HadronPhysics3, Grant Agreement No. 283286) under the Seventh Framework Programme of EU. This work is also partly supported by the National Natural Science Foundation of China under Grant. |
| Databáze: | OpenAIRE |
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