Search for the rare decay K(L) ---&gt; pi0 e+ e-

Alavi-Harati, A.

doi:10.1103/PhysRevLett.93.021805

Search for the rare decay K(L) ---> pi0 e+ e-

Journal Article · Mon Sep 01 04:00:00 EDT 2003 · Phys.Rev.Lett.

DOI:https://doi.org/10.1103/PhysRevLett.93.021805· OSTI ID:1893483

Alavi-Harati, A.

The KTeV/E799 experiment at Fermilab has searched for the rare kaon decay KL--> pi0ee. This mode is expected to have a significant CP violating component. The measurement of its branching ratio could support the Standard Model or could indicate the existence of new physics. This letter reports new results from the 1999-2000 data set. One event is observed with an expected background at 0.99 +/- 0.35 events. We set a limit on the branching ratio of 3.5 x 10^(-10) at the 90% confidence level. Combining the results with the dataset taken in 1997 yields the final KTeV result: BR(KL --> pi0 ee) < 2.8 x 10^(-10) at 90% CL.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Contributing Organization:: KTeV

DOE Contract Number:: AC02-07CH11359

OSTI ID:: 1893483

Report Number(s):: FERMILAB-PUB-03-446-E; arXiv:hep-ex/0309072; oai:inspirehep.net:629154

Journal Information:: Phys.Rev.Lett., Journal Name: Phys.Rev.Lett. Vol. 93

Country of Publication:: United States

Language:: English

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