The Decay Omega^- -> Xi^- pi^+ pi^- in Chiral Perturbation Theory
Oleg Antipin, Jusak Tandean, G. Valencia
TL;DR
This paper analyzes the Omega^- decay into Xi^- pi^+ pi^- using heavy-baryon chiral perturbation theory, revealing leading-order predictions conflict with data and suggesting higher-order contributions are necessary.
Contribution
It introduces a detailed chiral perturbation theory analysis of Omega^- decay, highlighting the importance of next-to-leading order contributions to match experimental observations.
Findings
Leading order predicts dominance of Xi^{*0}(1530) intermediate state.
Predicted decay rate and mass distribution conflict with data.
Next-to-leading order contributions may resolve the discrepancy.
Abstract
We study the decay Omega^- -> Xi^- pi^+ pi^- in heavy-baryon chiral perturbation theory. At leading order, the decay is completely dominated by the Xi^{*0}(1530) intermediate state, and the predicted rate and Xi^-pi^+ mass distribution are in conflict with currently available data. It is possible to resolve this conflict by considering additional contributions at next-to-leading order.
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