RAMBERG, E J , BOCK, G J , COLEMAN, R , ENAGONIO, J , HSIUNG, Y B , STANFIELD, K , TSCHIRHART, R , YAMANAKA, T , BARKER, A R , BRIERE, R A , GIBBONS, L K , MAKOFF, G , PAPADIMITRIOU, V , PATTERSON, J R , SOMALWAR, S , WAH, Y W , WINSTEIN, B , WINSTON, R , WOODS, M , YAMAMOTO, H , SWALLOW, E C , BLAIR, G , GOLLIN, G D , KARLSSON, M , OKAMITSU, J K , DEBU, P , PEYAUD, B , TURLAY, R and VALLAGE, B (1993) Measurement of the CP-Violation Parameter η+-γ in Neutral Kaon Decays. Physical Review Letters, 70 (17).
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Interference between K(S) and K(L) decays into the final state pi+pi-gamma has been observed in experiment 731 at Fermilab. By fitting the distribution of decays downstream of a regenerator, a new CP-violation parameter eta+-gamma, analogous to eta+-, has been measured, with its magnitude equal to (2.15 +/- 0.26 +/- 0.20) x 10(-3), and phi+-gamma, the associated phase angle, equal to (72 +/- 23 +/- 17)degrees. Assuming that any difference between this fit value for eta+-, and the previously measured value for eta+- can be attributed to direct CP violation in this decay, a limit of \epsilon'+-gamma\/epsilon < 0.3 at the 90% confidence level has been made.
This is a Submitted version This version's date is: 26/4/1993 This item is not peer reviewed
https://repository.royalholloway.ac.uk/items/52c6f4d7-469d-8c3e-438d-5365e7f8f4e1/5/
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