title: Search for the decay K(L) --> pi(0)&mgr;(+)&mgr;(-)
abstract: We report on a search for the decay K(L)-->pi(0)&mgr;(+)&mgr;(-) carried out as a part of the KTeV experiment at Fermilab. This decay is expected to have a significant CP violating contribution and a direct measurement will either support the Cabibbo-Kobayashi-Maskawa mechanism for CP violation or point to new physics. Two events were observed in the 1997 data with an expected background of 0.87+/-0.15 events, and we set an upper limit B(K(L)-->pi(0)&mgr;(+)&mgr;(-))<3. 8x10(-10) at the 90% confidence level.
authors.affiliation: University of Arizona, Tucson, Arizona 85721 and University of California at Los Angeles, Los Angeles, California 90095, USA.
authors.initials: A
authors.lastname: Alavi-Harati
authors.initials: IF
authors.lastname: Albuquerque
authors.initials: T
authors.lastname: Alexopoulos
authors.initials: M
authors.lastname: Arenton
authors.initials: K
authors.lastname: Arisaka
authors.initials: S
authors.lastname: Averitte
authors.initials: AR
authors.lastname: Barker
authors.initials: L
authors.lastname: Bellantoni
authors.initials: A
authors.lastname: Bellavance
authors.initials: J
authors.lastname: Belz
authors.initials: R
authors.lastname: Ben-David
authors.initials: DR
authors.lastname: Bergman
authors.initials: E
authors.lastname: Blucher
authors.initials: GJ
authors.lastname: Bock
authors.initials: C
authors.lastname: Bown
authors.initials: S
authors.lastname: Bright
authors.initials: E
authors.lastname: Cheu
authors.initials: S
authors.lastname: Childress
authors.initials: R
authors.lastname: Coleman
authors.initials: MD
authors.lastname: Corcoran
authors.initials: G
authors.lastname: Corti
authors.initials: B
authors.lastname: Cox
authors.initials: MB
authors.lastname: Crisler
authors.initials: AR
authors.lastname: Erwin
authors.initials: R
authors.lastname: Ford
authors.initials: A
authors.lastname: Glazov