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

A Alavi-Harati,S A Taegar,E C Swallow,A Glazov,J Whitmore,R Ford,B Winstein,R J Tesarek,E Blucher,V Prasad,S Averitte,B Quinn,S Bright,K Arisaka,M Sadamoto,P M Fordyce,N Solomey,H G E Kobrak,S Childress,K Hagan,A R Erwin,P Shanahan,A Golossanov,A Roodman,R Tschirhart,R A Swanson,E D Zimmerman,C Bown,L Bellantoni,G Corti,A Bellavance,J Ladue,M Pang,V Jejer,Y W Wah,K Senyo,P A Toale,P Mikelsons,T Nakaya ,A R Barker ,G Graham ,A Lath ,J Belz ,T Yamanaka ,I Suzuki ,James Wang ,D Jensen ,M Crisler ,E Monnier ,K Hanagaki ,S Somalwar ,A Ledovskoy ,M Corcoran ,H B White ,W Slater ,S Hidaka ,S Schnetzer ,R Stone ,P Shawhan ,J Jennings ,P Mcbride ,C F Qiao ,K S Nelson ,M W Arenton ,J Graham ,T Alexopoulos ,G J Bock ,A Tripathi ,B E Cox ,R Winston ,I F M Albuquerque ,V O’dell ,D R Bergman ,G B Thomson ,R Coleman ,E Cheu ,A P Mcmunus ,R Keßler ,R Pordes ,E Halkiadakis ,H H Nguyen ,Y Hsiung ,R Ben‐David ,R Ray ,E Ramberg

doi:10.1103/physrevlett.86.397

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

A Alavi-Harati, S A Taegar + Show 83 more

https://doi.org/10.1103/physrevlett.86.397

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Journal: Physical Review Letters	Publication Date: Jan 15, 2001
Citations: 24

Affiliation: University of Wisconsin–Madison, University of Arizona, Elmhurst College, Fermi National Accelerator Laboratory, University of Chicago, Rutgers, The State University of New Jersey, University of California, Los Angeles, Osaka University, University of Colorado Boulder, University of California, San Diego, University of Virginia, Rice University

#Decay KL #Mechanism For CP Violation + Show 4 more

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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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