Search for lepton-flavor-violating decays of the neutral kaon.

Authors :: Abouzaid E
Arenton M
Barker AR
Bellantoni L
Bellavance A
Blucher E
Bock GJ
Cheu E
Coleman R
Corcoran MD
Cox B
Erwin AR
Escobar CO
Glazov A
Golossanov A
Gomes RA
Gouffon P
Hsiung YB
Jensen DA
Kessler R
Kotera K
Ledovskoy A
McBride PL
Monnier E
Nguyen H
Niclasen R
Ii DG
Ping H
Ramberg EJ
Ray RE
Ronquest M
Santos E
Slater W
Smith D
Solomey N
Swallow EC
Toale PA
Tschirhart R
Wah YW
Wang J
White HB
Whitmore J
Wilking MJ
Winstein B
Winston R
Wolfe C
Worcester ET
Worcester M
Yamanaka T
Zimmerman ED
Zukanovich RF
Source :: Physical review letters [Phys Rev Lett] 2008 Apr 04; Vol. 100 (13), pp. 131803. Date of Electronic Publication: 2008 Apr 04.
Publication Year :: 2008
Abstract: The Fermilab KTeV experiment has searched for lepton-flavor-violating decays of the K(L) meson in three decay modes. We observe no events in the signal region for any of the modes studied, and we set the following upper limits for their branching ratios at the 90% C.L.: BR(K(L) --> pi(0) micro(+/-) e(-/+)) <7.6 x 10(-11); BR(K(L) --> pi(0)pi(0) micro(+/-) e(-/+)) <1.7 x 10(-10); BR(pi(0) --> micro(+/-) e(-/+)) <3.6 x 10(-10). This result represents a factor of 82 improvement in the branching ratio limit for K(L) --> pi(0) micro(+/-) e(-/+) and is the first reported limit for K(L) --> pi(0)pi(0) micro(+/-) e(-/+).