منابع مشابه
Quark model description of the NN ∗ ( 1440 ) potential
We derive a NN * (1440) potential from a non-relativistic quark-quark interaction and a chiral quark cluster model for the baryons. By making use of the Born-Oppenheimer approximation we examine the most important features of this interaction in comparison to those obtained from meson-exchange models.
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H. Haberzettl1,* and K. Nakayama2,3,† 1Institute for Nuclear Studies and Department of Physics, The George Washington University, Washington, DC 20052, USA 2Department of Physics and Astronomy, University of Georgia, Athens, GA 30602, USA 3Institut für Kernphysik and Jülich Center for Hadron Physics, Forschungszentrum Jülich, 52425 Jülich, Germany (Received 8 November 2010; revised manuscript r...
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The renormalization of the T -matrix for NN scattering with a contact potential is reexamined in a nonperturbative regime through rigorous nonperturbative solutions. Based on the underlying theory, it is shown that the ultraviolet divergences in the nonperturbative solutions of the T -matrix should be subtracted through ”endogenous” counter terms, which in turn leads to a nontrivial prescriptio...
متن کاملSpectral Function in a Semirealistic NN Potential Model
The spectral function of 4He is calculated with the Lorentz integral transform method in a large energy and momentum range. The excitation spectrum of the residual 3N–system is fully taken into account. The obtained spectral function is used to calculate the quasi elastic longitudinal (e, e) response RL of 4He for q = 300, 400, and 500 MeV/c. Comparison with the exact RL shows a rather sizeable...
متن کاملΠn N * (1440) and Σn N * (1440) Coupling Constants from a Microscopic N N → N N * (1440) Potential
The N * (1440), or Roper resonance, plays an important role in nucleon and nuclear dynamics as an intermediate state. The excitation of a Roper may mediate pion electro-and photoproduction processes 1 , pion and double pion production in N N reactions 2,3 , heavy ion collisions 4 , etc. In this context, the knowledge of the N N → N N * (1440) interaction and the πN N * (1440) and σN N * (1440) ...
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ژورنال
عنوان ژورنال: The European Physical Journal A
سال: 2004
ISSN: 1434-6001,1434-601X
DOI: 10.1140/epjad/s2004-03-017-9