Compositeness of hadron resonances in chiral dynamics
Abstract
Recent experimental observations of many unconventional hadronic states stimulate an interest in the structure of hadrons. While various internal configurations have been proposed, it is a subtle problem to identify the structure of hadron resonances in a model independent manner. Here we discuss the composite/elementary nature of hadrons using the field renormalization constant Z. In particular, we show that the magnitude of the effective range parameter re is related to the structure of s-wave near-threshold resonances.
Based on a plenary talk presented at the Seventh International Symposium on Chiral Symmetry in Hadrons and Nuclei, Beijing, China, 27–30 October 2013.
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