Search for the Decay K{sub L} {yields} {pi}{sup 0}{mu}{sup +}{mu}{sup -}

Journal Article · Mon Jun 05 00:00:00 EDT 2000 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.84.5279· OSTI ID:20216794

Alavi-Harati, A ^[1]; Albuquerque, I F ^[2]; Alexopoulos, T ^[3]; Arenton, M ^[4]; Arisaka, K ^[5]; Averitte, S ^[2]; Barker, A R ^[6]; Bellantoni, L ^[7]; Bellavance, A ^[8]; Belz, J ^[2]

---

1. University of Arizona, Tucson, Arizona 85721 (United States)
2. Rutgers University, Piscataway, New Jersey 08855 (United States)
3. University of Wisconsin, Madison, Wisconsin 53706 (United States)
4. The Department of Physics and Institute of Nuclear and Particle Physics, University of Virginia, Charlottesville, Virginia 22901 (United States)
5. University of California at Los Angeles, Los Angeles, California 90095 (United States)
6. University of Colorado, Boulder, Colorado 80309 (United States)
7. Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)
8. Rice University, Houston, Texas 77005 (United States)

We report on a search for the decay K{sub L}{yields}{pi}{sup 0}{mu}{sup +}{mu}{sup -} 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{sub L}{yields}{pi}{sup 0}{mu}{sup +}{mu}{sup -})<3.8x10{sup -10} at the 90% confidence level. (c) 2000 The American Physical Society.

• OSTI ID: 20216794
• Journal Information: Physical Review Letters, Vol. 84, Issue 23; Other Information: PBD: 5 Jun 2000; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
KAONS
SEMILEPTONIC DECAY
PIONS NEUTRAL
MUONS MINUS
MUONS PLUS
CP INVARIANCE
KOBAYASHI-MASKAWA MATRIX
EXPERIMENTAL DATA