New combined analysis of elastic and charge exchange K N (K \xAFN ) scattering in the Regge realm

The Regge features of elastic K^±N →K^±N , and charge exchange K^-p →K^¯0n and K⁺n →K⁰p reactions are described by using a combined analysis of all these channels at high momenta. Based on the meson exchanges in the t -channel with their decays to a K K ¯ pair allowed, the exchanges of ρ (775 )+ω (782 ) are excluded in contrast to existing model calculations and the present paper follows a new scheme for the meson exchanges a₀(980 ) +ϕ (1020 ) +f₂(1275 ) +a₂(1320 ) Reggeized for the forward elastic-scattering amplitude together with Pomeron. The charge exchange reactions are described by a₀(980 ) +a₂(1320 ) exchanges in the t -channel. Dominance of the isoscalar f₂ and Pomeron exchanges beyond P_Lab≈3 GeV /c is shown in the elastic process. Both the isovector a₀ and a₂ exchanges in charge exchange reactions play the respective roles in the low- and high-momenta region. Differential and total cross sections are presented to compare with existing data. A discussion is given to the polarization of K^-p →K^-p at P_Lab=10 GeV /c and K^-p →K^¯0n at P_Lab=8 GeV /c .