Probe $Λ- \barΛ$ oscillation in $J/ψ\rightarrow Λ\,\barΛ$ decay at BES-III

Details Probe $Λ- \barΛ$ oscillation in $J/ψ\rightarrow Λ\,\barΛ$ decay at BES-III Probe $Λ- \barΛ$ oscillation in $J/ψ\rightarrow Λ\,\barΛ$ decay at BES-III

2010-08-17

arxiv.org/abs/1008.2845v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 1 figure, Talk given at "the 8th symposium on advanced topics of interdisciplinary fields of particle physics, nuclea

Scientific paper

We discuss the possible searching for the oscillation by coherent $\Lambda\bar{\Lambda}$ production in $J/\psi \rightarrow \Lambda \bar{\Lambda}$ decay process. The sensitivity of measurement of $\Lambda - \bar{\Lambda}$ 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 $\Lambda -\bar{\Lambda}$ oscillation parameter. With one year's luminosity at BES-III, we can set an upper limit of $\delta m < 10^{-15}$ MeV at 90% confidence level, corresponding to about $10^{-6}$ s of $\Lam-\Lamb$ oscillation time.

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