Search for the decay KL --> pi(0)e+e

Search for the decay KL --> pi(0)e+e

We report on a search for the decay KL-->pi(0)e+e- carried out by the KTeV/E799 experiment at Fermilab. This decay is expected to have a significant CP violating contribution and the measurement of its branching ratio could support the Cabibbo-Kobayashi-Maskawa mechanism for CP violation or could...

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Veröffentlicht in:Physical review letters 2001-01, Vol.86 (3), p.397-401
Hauptverfasser: Alavi-Harati, A, Albuquerque, I F, Alexopoulos, T, Arenton, M, Arisaka, K, Averitte, S, Barker, A R, Bellantoni, L, Bellavance, A, Belz, J, Ben-David, R, Bergman, D R, Blucher, E, Bock, G J, Bown, C, Bright, S, Cheu, E, Childress, S, Coleman, R, Corcoran, M D, Corti, G, Cox, B, Crisler, M B, Erwin, A R, Ford, R, Fordyce, P M, Glazov, A, Golossanov, A, Graham, G, Graham, J, Hagan, K, Halkiadakis, E, Hanagaki, K, Hidaka, S, Hsiung, Y B, Jejer, V, Jennings, J, Jensen, D A, Kessler, R, Kobrak, H G, LaDue, J, Lath, A, Ledovskoy, A, McBride, P L, McManus, A P, Mikelsons, P, Monnier, E, Nakaya, T, Nelson, K S, Nguyen, H, O'Dell, V, Pang, M, Pordes, R, Prasad, V, Qiao, C, Quinn, B, Ramberg, E J, Ray, R E, Roodman, A, Sadamoto, M, Schnetzer, S, Senyo, K, Shanahan, P, Shawhan, P S, Slater, W, Solomey, N, Somalwar, S V, Stone, R L, Suzuki, I, Swallow, E C, Swanson, R A, Taegar, S A, Tesarek, R J, Thomson, G B, Toale, P A, Tripathi, A, Tschirhart, R, Wah, Y W, Wang, J, White, H B, Whitmore, J, Winstein, B, Winston, R, Yamanaka, T, Zimmerman, E D
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Sprache:eng
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Zusammenfassung:We report on a search for the decay KL-->pi(0)e+e- carried out by the KTeV/E799 experiment at Fermilab. This decay is expected to have a significant CP violating contribution and the measurement of its branching ratio could support the Cabibbo-Kobayashi-Maskawa mechanism for CP violation or could point to new physics. Two events were observed in the 1997 data with an expected background of 1.06+/-0.41 events, and we set an upper limit B(KL-->pi(0)e+e-)
ISSN:0031-9007