Nucleon Nucleon Potential
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Radiatively induced non linearity in the Walecka model
We evaluate the effective potential for the conventional linear Walecka non perturbatively up to one loop. This quantity is then renormalized with a prescription which allows finite vacuum contributions to the three as well as four 1PI Green's functions to survive. These terms, which are absent in the standard relativistic Hartree approximation, have a logar
Brazilian Journal of Physics. Publicado em: 2010-12
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2. Brazilian relativistic O(q4) two-pion exchange nucleon-nucleon potential: parametrized version
In our recent works we derived a chiral O(q4) two-pion exchange nucleon-nucleon potential (TPEP) formulated in a relativistic baryon (RB) framework, expressed in terms of the so called low energy constants (LECs) and functions representing covariant loop integrations. In order to facilitate the use of the potential in nuclear applications, we present a param
Brazilian Journal of Physics. Publicado em: 2007-03
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3. O potencial nucleon-nucleon e a troca de dois píons relativística / Nucleon-nucleon potential and the relativistic exchange of two pions
This work is devoted to the construction of a two-pion Exchange nucleon-nucleon potential in the framework of the relativist chiral perturbation theory, formulated by Becher and Leutwyler. In their study of pion-nucleon scattering they developed a method to regain the Power counting rules while keeping Lorentz invariance. These authors also Drew attention to
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/08/2003
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4. Nonlocal description of the nuclear interaction
Extensive systematizations of theoretical and experimental nuclear densities and of optical potential strengths extracted from heavy-ion elastic scattering data analyses at low and intermediate energies are presented. The energy-dependence of the nuclear potential is accounted for within a model based on the nonlocal nature of the interaction. The systematic
Brazilian Journal of Physics. Publicado em: 2003-06
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5. Nuclear structure in nonmesonic weak decay of hypernuclei
A general shell model formalism for the nonmesonic weak decay of the hypernuclei has been developed. It involves a partial wave expansion of the emitted nucleon waves, preserves naturally the antisymmetrization between the escaping particles and the residual core, and contains as a particular case the weak lambda-core coupling formalism. The hypernuclei are
Brazilian Journal of Physics. Publicado em: 2003-06
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6. Estudo de Reações Fotonucleares Através de Eletrofissão: Energia de Excitação e Interação Píon-Núcleo\" / Estudo de Reações Fotonucleares Através da Eletrofissão: Energia de Excitação e Interação Píon-Núcleo.
Foram medidas as seções de choque de eletrofissão para os elementos Ta, Au e 182W de 35 MeV a 250 MeV e, através do formalismo dos fótons virtuais, as correspondentes seções de choque de fotofissão foram obtidas por desconvolução. Um método original para extração da energia média de excitação do núcleo composto é apresentado utilizando-se,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/04/1997
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7. THE NUCLEON-NUCLEON SPIN-ORBIT POTENTIAL*