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arXiv · 1609.07733

Model-independent determination of the compositeness of near-threshold quasibound states

Yuki Kamiya·Tetsuo Hyodo
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Abstract

We study the compositeness of near-threshold states to clarify the internal structure of exotic hadron candidates. Within the framework of effective field theory, we extend the Weinberg's weak-binding relation to include the nearby CDD (Castillejo-Dalitz-Dyson) pole contribution with the help of the Pade approximant. Finally, using the extended relation, we conclude that the CDD pole contribution to the Lambda(1405) baryon in the Kbar N amplitude is negligible.

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Yuki Kamiya, Tetsuo Hyodo. 2016-09-25. Model-independent determination of the compositeness of near-threshold quasibound states. https://doi.org/10.7566/jpscp.13.020056

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