2018 •
Extraction of Polarization Parameters in the ‾pp → Ω̄Ω Reaction
Authors:
Elisabetta Perotti
Abstract:
A method to extract the polarization of Omega hyperons produced via the strong interaction is presented. Assuming they are spin 3/2 particles, the corresponding spin density matrix can be written in terms of seven non-zero polarization parameters, all retrievable from the angular distribution of the decay products. Moreover by considering the full decay chain Omega ->Lambda K -> p pi K the magnitude of the asymmetry parameters beta Omega and gamma Omega can be obtained. This method, applied here to the specific Omega case, can be generali (...)
A method to extract the polarization of Omega hyperons produced via the strong interaction is presented. Assuming they are spin 3/2 particles, the corresponding spin density matrix can be written in terms of seven non-zero polarization parameters, all retrievable from the angular distribution of the decay products. Moreover by considering the full decay chain Omega ->Lambda K -> p pi K the magnitude of the asymmetry parameters beta Omega and gamma Omega can be obtained. This method, applied here to the specific Omega case, can be generalized to any weakly decaying hyperon and is perfectly suited for the PANDA experiment where hyperon-antihyperon pairs will be copiously produced in proton-antiproton collisions. The aim is to take a step forward towards the understanding of the mechanism that reigns strangeness production in these processes. (Read More)
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