Eur. Phys. J. A 14, 239-245 (2002)
DOI: 10.1140/epja/i2001-10123-2

Contribution of the to the reaction along with Coulomb distortion effects

K.S. Kim¹, M.K. Cheoun², S.W. Hong¹ and Y. Chung<sup>3

1</sup>  BK21 Physics Research Division and Institute of Basic Science, Sungkyunkwan University, Suwon, 440-746 Korea
²  ICUNSF, Building 139-1, Seoul National University, Seoul, 150-741, Korea
³  Department of Physics, Yosu National University, Yosu, 550-250, Korea

kyungsik@color.skku.ac.kr
cheoun@phya.snu.ac.kr

(Received: 21 July 2001 / Revised version: 5 March 2002 Communicated by V. Vento)

Abstract
The -resonance contribution has been included in the (e,e'p) reaction along with Coulomb distortion effects. We treat the resonance via a non-relativistic current operator and use a Dirac Hartree single-particle model for the ground-state single-particle wave function and a relativistic optical model for the knocked-out proton wave function. It is assumed that the -meson created by the virtual photon is absorbed in the target nucleus following the production of a -resonance. Our DWBA calculation shows that the -resonance contribution to the (e,e'p) reaction cross-section is 10-15% for an energy of 250 MeV transfered to the proton knocked out of the s-shell of , in the parallel and perpendicular kinematics.

PACS
24.90.+d - Other topics in nuclear reactions: general.
25.30.-c - Lepton-induced reactions.

© Società Italiana di Fisica, Springer-Verlag 2002