The general propagator for S-wave threshold states

Abstract We demonstrate that the propagator, derived from an Effective Field Theory (EFT) that incorporates Weinberg’s compositeness theorem, provides a more general formula for describing S-wave near-threshold states. By fitting the lineshape using this propagator, we can extract the Z factor for t...

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Bibliographic Details
Main Authors: Hongge Xu, Ning Yu, Zuman Zhang, Guoying Chen
Format: Article
Language:English
Published: SpringerOpen 2025-01-01
Series:Journal of High Energy Physics
Subjects:
Online Access:https://doi.org/10.1007/JHEP01(2025)102
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