Observation of Five-Track Decay Modes of the Ω^- Hyperon

Details Observation of Five-Track Decay Modes of the Ω^- Hyperon Observation of Five-Track Decay Modes of the Ω^- Hyperon

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..apre14007s&link_type=abstract

American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As

Astronomy and Astrophysics

Astrophysics

Scientific paper

The HyperCP experiment, E871 at Fermilab, has a large sample of Ω^- hyperons that has allowed us to search for four decay modes that involve five charged tracks in the final state. We have observed three of the four decay modes with large statistics: (1) Ω^- arrow Λ K^- where the K^- decays into 3 pions and the Λ into pπ^- is used for normalization; (2) the double-Zweig-suppressed decay Ω^- arrow Ξ^- π^+ π^- where the Ξ^- decays into Λ π^- and the Λ into pπ^- and (3) the strong decay Ω^- arrow Ξ^*0 π^- where the Ξ^*0 decays into Ξ^- π^+ and the Ξ^- decays as in mode (2). The decay mode Ω^- arrow Ξ^- μ^+ μ^- where the Ξ^- decays as in mode (2) is not observed, but is important in that it allows us to place a limit on the flavor-changing-neutral-current decay process in hyperons.

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