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Search for the decay KL --> pi(0)e+e- |
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| Authors: | 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 |
| Institution: | University of Arizona, Tucson 85721, USA. |
| Abstract: | 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-)<5.1 x 10(-10) at the 90% confidence level. |
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