Measurement of the K0 Charge Radius and a CP-Violating Asymmetry and a Search for CP-Violating E1 Direct Photon Emission in the Rare Decay KL ! e e
نویسندگان
چکیده
E. Abouzaid, M. Arenton, A. R. Barker, L. Bellantoni, A. Bellavance, E. Blucher, G. J. Bock, E. Cheu, R. Coleman, M. D. Corcoran, G. Corti, B. Cox, A. R. Erwin, C. O. Escobar, A. Glazov, A. Golossanov,* R. A. Gomes, P. Gouffon, K. Hanagaki, Y. B. Hsiung, H. Huang, D. A. Jensen, R. Kessler, K. Kotera, A. Ledovskoy, P. L. McBride, E. Monnier, K. S. Nelson, H. Nguyen, R. Niclasen, H. Ping, X. R. Qi, E. J. Ramberg, R. E. Ray, M. Ronquest, E. Santos, J. Shields, W. Slater, D. Smith, N. Solomey, E. C. Swallow, P. A. Toale, R. Tschirhart, C. Velissaris, Y. W. Wah, J. Wang, H. B. White, J. Whitmore, M. Wilking, B. Winstein, R. Winston, E. T. Worchester, M. Worchester, T. Yamanaka, E. D. Zimmerman, and R. F. Zukanovich
منابع مشابه
CP- and T-Violation in the Decay KL → π + π − e + e − and Related Processes ∗
I review the theoretical basis of the prediction that the decay KL → π+π−e+e− should show a large CP and T -violation, a prediction now confirmed by the KTeV experiment. The genesis of the effect lies in a large violation of CP and T -invariance in the decay KL → π+π−γ, which is encrypted in the polarization state of the photon. The decay KL → π+π−e+e− serves as an analyser of the photon polari...
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The decay mode KL ! + e + e may provide an interesting testing ground for CP violation. A theoretical model predicts a branching ratio of 3 10 7 and a CP-violating asymmetry of 14%. Experimentally, only an upper limit has been established so far. We have conducted an experimental search for the decay mode with the 13-GeV/c proton synchrotron at KEK. We have observed 12 5 events, and obtained th...
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A long-standing question in high energy physics has been the origin of the phenomenon of CP violation. CP violation was first observed in the decay KL → π+π− [1]. Effects have subsequently been found in KL → π0π0 [2], the charge asymmetry of KL → e±π∓ν (Ke3) [3] and KL → μ±π∓ν (Kμ3) [4], KL → π+π−γ [5] and most recently in KL → ππee [6]. All of these effects can be explained by applying a singl...
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