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https://hdl.handle.net/10316/4504
Title: | N* electroproduction amplitudes in a model with dynamical confinement | Authors: | Alberto, P. Fiolhais, M. Golli, B. Marques, J. |
Issue Date: | 2001 | Citation: | Physics Letters B. 523:3-4 (2001) 273-279 | Abstract: | The Roper resonance is described in a chiral version of the chromodielectric model as a cluster of three quarks in radial-orbital configuration (1s)2(2s)1, surrounded by [pi]- and [sigma]-meson clouds and by a chromodielectric field which assures quark dynamical confinement. Radial profiles for all fields are determined self-consistently for each baryon. Transverse A1/2 and scalar S1/2 helicity amplitudes for the nucleon-Roper transition are calculated. The contribution of glueball and [sigma]-meson vibrations is estimated; although small for N(1440), the [sigma] contribution can be large for N(1710). | URI: | https://hdl.handle.net/10316/4504 | DOI: | 10.1016/S0370-2693(01)01348-X | Rights: | openAccess |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais |
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