RAMBERG, E J , BOCK, G J , COLEMAN, R , ENAGONIO, J , HSIUNG, Y B , STANFIELD, K , TSCHIRHART, R , YAMANAKA, T , BARKER, A , 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) Simultaneous measurement of KS and KL decays into π+π-γ. Physical Review Letters, 70 (17).
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With the E731 apparatus at Fermilab, we have simultaneously collected 6859 K(L) and K(S) decays into pi+pi-gamma. Using our sample of over 370000 pi+pi- decays for normalization we have determined that the ratio GAMMA(K0 --> pi+pi-gamma)/GAMMA(K0 --> pi+pi-) is (23.0 +/- 0.7) x 10(-3) for K(L) and (7.10 +/- 0.22) x 10(-3) for K(S), for photon energies greater than 20 MeV in the kaon center of mass. After removing the inner-bremsstrahlung contribution, we find that the photon energy spectrum of the direct emission decay of the K(L) is consistent with the presence of a vector meson propagator in the form factor.
This is a Submitted version This version's date is: 26/4/1993 This item is not peer reviewed
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