Abstract
We investigate the meson exchange current (MEC) contribution to {ital K}{sup +}-nucleus elastic scattering. Starting with a model of the off-shell {ital K}{pi} scattering amplitude and a calculation of the excess pion distribution in finite nuclei, we proceed to derive both real and imaginary forward scattering amplitudes for the MEC contribution. The resulting amplitudes interfere constructively with the optical model amplitudes, and, therefore, lead to an increase in both calculated total and differential cross sections. This increase brings about a better agreement with the data, in particular with regard to the energy dependence of the total cross section. This last feature follows from the fact that the calculated imaginary MEC amplitude has a threshold at incident momentum {ital p}{similar to}400 MeV/{ital c}, which distinguishes our MEC model from recently proposed nucleon {ital swelling}'' models. We also examine the sources of uncertainties for our results.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
