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27 April 2024

» arxiv » hep-ph/0409246

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Direct calculation of the K-matrix for pion electro-production in the Delta channel
P. Alberto ; L. Amoreira ; M. Fiolhais ; B. Golli ; S. Sirca ;
Date:	21 Sep 2004
Subject:	hep-ph
Abstract:	We present a method to calculate directly the K-matrices for the pion electro-production processes in the framework of chiral quark models which allows for a clean separation of the resonant amplitudes from the background. The method is applied to the calculation of the multipole amplitudes M_{1+}, E_{1+}, and S_{1+} in the Delta channel within the Cloudy Bag Model. A good overall description is found in a broad energy range.
Source:	arXiv, hep-ph/0409246
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