Pion-nucleus optical potential valid up to the Δ-resonance region

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Abstract

We present in this article an optical potential for the π-nucleus interaction that can be used in various studies involving π-nucleus channels. Based on earlier treatments of the tow-energy π-nucleus optical potential, we have derived a potential expression applicable from threshold up to the Δ-resonance region. We extracted the impulse approximation form for this potential from the π-N scattering amplitude and then added to it kinematical and physical corrections. The kinematic corrections arise from transforming the impulse approximation expression from the π-N center of mass frame to the π-nucleus center of mass frame, while the physical corrections arise mostly from the many-body nature of the π-nucleus interaction. By taking advantage of the experimental progress in our knowledge of the π-N process, we have updated earlier treatments with parameters calculated from state-of-the-art experimental measurements.

Original languageEnglish
Pages (from-to)646011-646019
Number of pages9
JournalPhysical Review C - Nuclear Physics
Volume66
Issue number6
Publication statusPublished - 1 Dec 2002
Externally publishedYes

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pions
nuclei
center of mass
impulses
approximation
scattering amplitude
kinematics
interactions
thresholds
energy

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Pion-nucleus optical potential valid up to the Δ-resonance region. / Aburaddad, Laith.

In: Physical Review C - Nuclear Physics, Vol. 66, No. 6, 01.12.2002, p. 646011-646019.

Research output: Contribution to journalArticle

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