Pion contribution to -nucleus scattering from chiral Lagrangian

Y. H. Tan; L. Li; P. Z. Ning

doi:10.1209/epl/i2002-00389-2

All issues

Volume 58 / No 2 (April 2002)

Europhys. Lett., 58 2 (2002) 202-208

Abstract

This article has an erratum: [https://doi.org/10.1209/epl/i2002-00107-2]

Issue		Europhys. Lett. Volume 58, Number 2, April 2002


Page(s)		202 - 208
Section		Nuclear physics
DOI		https://doi.org/10.1209/epl/i2002-00389-2
Published online		01 August 2002

Europhys. Lett., 58 (2), pp. 202-208 (2002)

Pion contribution to $\chem{K^+}$ -nucleus scattering from chiral Lagrangian

Y. H. Tan¹^,2, L. Li² and P. Z. Ning¹^,2^,3

¹ CCAST(World Laboratory) - P.O. Box 8730, Beijing 100080, PRC
² Department of Physics, Nankai University - Tianjin 300071, PRC
³ Institute of Theoretical Physics - Beijing 100080, PRC

Corresponding authors: tanchunhu@eyou.com ningpz@nankai.edu.cn

Received: 14 September 2001
Accepted: 22 January 2002

Abstract

The $\chem{K^+}$ interactions with the on- and off-mass-shell virtual pions in nuclei are evaluated in the chiral perturbation theory at the leading order. It is found that the contribution of the nuclear pions to the ratio of the cross-sections $R = \sigma (\chem{K^+} \ab{A}) /6\sigma (\chem{K^+} \ab{D})$ for nuclei $\chem{^{12}C}$ and $\chem{^{28}Si}$ is about 9%. Inclusion of the off-mass-shell behavior of the $\chem{K^+}\pi$ amplitude may produce a significant improvement to the systematic discrepancies between the experiment data and optical model calculations on the ratio R.

PACS: 24.10.Jv – Relativistic models / 25.45.De – Elastic and inelastic scattering

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