On the K^+D Interaction at Low Energies

TL;DR

This paper analyzes low-energy K^+d interactions using impulse approximation and NN final-state interactions, comparing theoretical predictions with experimental data to understand the scattering processes and extract the isoscalar KN scattering length.

Contribution

It provides a detailed theoretical analysis of K^+d reactions at low energies, incorporating realistic phase shifts and NN FSI effects, and offers predictions useful for extracting scattering parameters.

Findings

NN FSI significantly affects K^+d->K^+pn cross sections

Theoretical predictions align with experimental data in the quasi-elastic region

Predictions for slow kaons can help determine the isoscalar KN scattering length

Abstract

The Kd reactions are considered in the impulse approximation with NN final-state interactions (NN FSI) taken into account. The realistic parameters for the KN phase shifts are used. The "quasi-elastic" energy region, in which the elementary KN interaction is predominantly elastic, is considered. The theoretical predictions are compared with the data on the K^+d->K^+pn, K^+d->K^0pp, K^+d->K^+d and K^+d total cross sections. The NN FSI effect in the reaction K^+d->K^+pn has been found to be large. The predictions for the Kd cross sections are also given for slow kaons, produced from phi(1020) decays, as the functions of the isoscalar KN scattering length a_0. These predictions can be used to extract the value of a_0 from the data.