Observation of the Decay<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>Ξ</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:mo>→</mml:mo><mml:msup><mml:mi>Σ</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>μ</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:msub><mml:mover accent="true"><mml:mi>ν</mml:mi><mml:mo>¯</mml:mo></mml:mover><mml:mi>μ</mml:mi></mml:msub></mml:math>
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説明
The {xi}{sup 0} muon semileptonic decay has been observed for the first time with nine identified events using the KTeV beam line and detector at Fermilab. The decay is normalized to the {xi}{sup 0} beta decay mode and yields a value for the ratio of decay rates {gamma}({xi}{sup 0}{yields}{sigma}{sup +}{mu}{sup -}{nu}{sub {mu}})/{gamma}({xi}{sup 0}{yields}{sigma}{sup +}e{sup -}{nu}= {sub e}) of [1.8{sub -0.5}{sup +0.7}(stat){+-}0.2(syst)]x10{sup -2}. This is in agreement with the SU(3) flavor symmetric quark model.
収録刊行物
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- Physical Review Letters
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Physical Review Letters 95 2005-08-19
American Physical Society (APS)
