Authors: A. Limphirat, K. Khosonthongkee, C. Kobdaj, P. Suebka and Y. Yan
Title: Lambda(1405) and Lambda(1520) decay in non-relativistic quark model
Keywords: decay width, non-relativistic quark model, Lambda
Abstract:
Lambda(1405) and Lambda(1520) have been investigated for decades but their internal structure are still unclear. In this work we study the two baryons assuming that both of them are three-quark states with a P-wave s-quark. The partial decay widths of the processes Lambda(1405) to Sigma pi and Lambda(1520) to Sigma pi are evaluated in the 3P0 non-relativistic model with all model parameters fixed by other hadron processes. It is found that our theoretical results are well consistent with experimental data.
The work indicates that both the Lambda(1405) and Lambda(1520) may be three-quark states, which is not in line with that the Lambda(1405) has been interpreted as a KbarN resonance since it was discovered.
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