Observation of the Decay {Xi}{sup 0} {r_arrow} {Sigma}{sup +}e {sup {minus}}{ovr {nu}}{sub e}
Journal Article
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· Physical Review Letters
OSTI ID:348256
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- University of Arizona, Tucson, Arizona 85721 (United States)
- University of California at Los Angeles, Los Angeles, California 90095 (United States)
- University of California at San Diego, La Jolla, California 92093 (United States)
- The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637 (United States)
- University of Colorado, Boulder, Colorado 80309 (United States)
- Elmhurst College, Elmhurst, Illinois 60126 (United States)
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)
- Osaka University, Toyonaka, Osaka 560 (Japan)
- Rice University, Houston, Texas 77005 (United States)
- Rutgers University, Piscataway, New Jersey 08855 (United States)
- The Department of Physics and Institute of Nuclear and Particle Physics, University of Virginia, Charlottesville, Virginia 22901 (United States)
We present the first observation of {Xi}{sup 0} beta decay, using the KTeV beam line and detector at Fermilab. We have identified 176 beta decay events after subtracting a 7 event background. Normalization to 41thinsp024 simultaneously collected {Xi}{sup 0}{r_arrow}{Lambda}{sup 0}{pi}{sup 0} decays yields a branching ratio of {Gamma}({Xi}{sup 0}{r_arrow}{Sigma}{sup +} e{sup {minus}}{ovr {nu}}{sub e})/{Gamma}{sub total}=(2.71{plus_minus}0.22{sub statisti cal}{plus_minus}0.31{sub systematic}) {times}10{sup {minus}4} . The flavor symmetric quark model calculation agrees with this result. {copyright} {ital 1999} {ital The American Physical Society}
- OSTI ID:
- 348256
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 19 Vol. 82; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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