Year: 2004
Type: article
Abstract: The sum of the $CP$-violating asymmetries ${A}_{\ensuremath{\Omega}}$ and ${A}_{\ensuremath{\Lambda}}$ in the decay sequence $\ensuremath{\Omega}\ensuremath{\rightarrow}\ensuremath{\Lambda}K$, $\ensuremath{\Lambda}\ensuremath{\rightarrow}p\ensuremath{\pi}$ is presently being measured by the E871 experiment. We evaluate contributions to ${A}_{\ensuremath{\Omega}}$ from the standard model and from possible new physics and find them to be smaller than the corresponding contributions to ${A}_{\ensuremath{\Lambda}}$, although not negligibly so. We also show that the partial-rate asymmetry in $\ensuremath{\Omega}\ensuremath{\rightarrow}\ensuremath{\Lambda}K$ is nonvanishing due to final-state interactions. Taking into account constraints from kaon data, we discuss how the upcoming result of E871 and future measurements may probe the various contributions to the observables.
Author: Jusak Tandean
Institution: Southern Methodist University
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2068953442