CoherentKSRegeneration on Protons from 30 to 130 GeV/c

Precise measurements at$t=0\mathrm{}$ of the $K_{L}p\to K_{S}p$ amplitude (modulus and phase) were made. Over 50000 $K_{\pi 2}$ decays along with normalizing $K_{\mu 3}$ events were detected behind a 7.2-m-long liquid-hydrogen regenerator. The momentum dependence of the modulus and phase are presented, and the results are combined with those of other experiments to extract the relevant parameters of $\omega$ exchange.