Search for Direct CP Violation in Non-Leptonic Decays of Charged $Ξ$ and $Λ$ Hyperons

Luk, K. B.; Diehl, H. T.; Duryea, J.; Guglielmo, G.; Heller, K.; Ho, P. M.; James, C.; Johns, K.; Longo, M. J.; Rameika, R.; Teige, S.; Thomson, G. B.

Search for Direct CP Violation in Non-Leptonic Decays of Charged $Ξ$ and $Λ$ Hyperons

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Description

A search for direct CP violation in the non-leptonic decays of hyperons has been performed. In comparing the product of the decay parameters, $α_Ξα_Λ$, in terms of an asymmetry parameter, $A_{ΞΛ}$, between hyperons and anti-hyperons in the charged $Ξ\to Λπ$ and $Λ\to p π$ decay sequence, we found no evidence of direct CP violations. The parameter $A_{ΞΛ}$ was measured to be $0.012 \pm 0.014$.
Submitted for publication; RevTex, 13 pages, 4 figures