The neutral kaon program at Fermilab and recent E731 results

Abstract

Currently, Fermilab has a long-range program in neutral kaon physics which covers a wide variety of physics topics. In this report, I will be discussing the latest results from experiment E731 on the radiative decay of neutral kaons K{sub L,S} {yields} {pi}{sup +}{pi}{sup {minus}} {gamma}. These results include the first measurement of two new CP violation parameters: {eta}{sub +} {sub {minus}}{gamma} = (2.60{plus minus}0.54{plus minus}0.21) {center dot} 10{sup {minus}3}, and {phi}{sub +}{sub {minus}}{gamma} = (41{plus minus}28{plus minus}11){degrees}. The presence of a rho propogator form factor in the K{sub L} direct mission decay has been confirmed. Besides these results, the status of experiments E773 and E799, which are running in the 1991 fixed target run at Fermilab, and plans for future neutral kaon experiments will be discussed. 9 refs., 6 figs., 1 tab

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