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Photoproduction of η ′ mesons off nuclei and their properties in the nuclear medium
We study the photoproduction of $\eta^\prime$ mesons from nuclei near the threshold within the collision model based on the nuclear spectral function. The model takes properly into account both primary photon-nucleon and secondary pion-nucleon $\eta^\prime$ production processes as well as the effect of the nuclear $\eta^\prime$ mean-field potential on these processes. We find that the secondary pion-induced reaction channel ${\pi}N \to...
17 p pdu 25/09/2012 132 1
Từ khóa: Nuclear Theory, Nuclear Experiment, photoproduction, nuclear spectral function, nuclear processes, effects of nuclear
Electromagnetic form factors of the nucleon in effective field theory
We calculate the electromagnetic form factors of the nucleon to third chiral order in manifestly Lorentz-invariant effective field theory. The ρ and ω mesons as well as the ∆(1232) resonance are included as explicit dynamical degrees of freedom. To obtain a self-consistent theory with respect to constraints we consider the proper relations among the couplings of the effective Lagrangian. For the purpose of generating a systematic power...
26 p pdu 25/09/2012 166 1
Từ khóa: Nuclear Science, electromagnetic, systematic power counting, field theory, vật lý hạt nhân, lý thuyết trường
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