Regulariztion dependence of S=0 and S=-1 meson-baryon system in the chiral unitary model

S. I. Nam; H. -Ch. KIm; T. Hyodo; D. Jido; A. Hosaka

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arXiv · hep-ph/0309017

Regulariztion dependence of S=0 and S=-1 meson-baryon system in the chiral unitary model

S. I. Nam·H. -Ch. KIm·T. Hyodo·D. Jido·A. Hosaka

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Abstract

We investigate the dependence of s-wave meson-baryon scattering amplitudes on different regularizations within the framework of the chiral unitary model. We employ two different regularization schemes, i.e. dimensional and form-factor regulariaztions to tame the divergences in the model. We also study the analytic structures of T-matrices, using those regularization schemes. We find that while the form-factor regularizaion produces almost the same results as the dimensional regularization did, the on-shell approximation is to some extent limited in the case of the form-factor regularization. Having chosen parameters properly, we show that the regularization dependences can be minimized.

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S. I. Nam, H. -Ch. KIm, T. Hyodo, D. Jido, A. Hosaka. 2003-09-02. Regulariztion dependence of S=0 and S=-1 meson-baryon system in the chiral unitary model. https://arxiv.org/abs/hep-ph/0309017

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