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arXiv · 0906.0230

Study of $\Lambda - \Lambdabar$ Oscillation in quantum coherent $\Lambda\Lambdabar$ state by using J/\psi \to \Lambda \bar{\Lambda}$ decay

Xian-Wei Kang·Hai-Bo Li·Gong-Ru Lu
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Abstract

We discuss the possibility of searching for the $\Lam - \Lamb$ oscillations for coherent $\Lam\Lamb$ production in the J/$\psi \to \Lam \Lamb$ decay process. The sensitivity of measurement of $\Lam -\Lamb$ oscillation in the external field at BES-III experiment is considered. These considerations indicate an alternative way to probe the $\Delta B =2$ amplitude in addition to neutron oscillation experiments. Both coherent and time-dependent information can be used to extract the $\Lam-\Lamb$ oscillation parameter. With one year's luminosity at BES-III, we can set an upper limit of $\delta m_{\Lam \Lamb} < 10^{-15}$ MeV at 90% confidence level, corresponding to about $10^{-6}$ s of $\Lam-\Lamb$ oscillation time.

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Xian-Wei Kang, Hai-Bo Li, Gong-Ru Lu. 2009-06-01. Study of $\Lambda - \Lambdabar$ Oscillation in quantum coherent $\Lambda\Lambdabar$ state by using J/\psi \to \Lambda \bar{\Lambda}$ decay. https://doi.org/10.1103/physrevd.81.051901

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