The general propagator for S-wave threshold states

The general propagator for S-wave threshold states

We demonstrate that the propagator, derived from an Effective Field Theory (EFT) that incorporates Weinberger'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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Hauptverfasser: Xu, Hongge, Yu, Ning, Zhang, Zuman, Chen, Guoying
Format: Artikel
Sprache:eng
Schlagworte:
Physics - High Energy Physics - Experiment
Physics - High Energy Physics - Phenomenology
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Zusammenfassung:We demonstrate that the propagator, derived from an Effective Field Theory (EFT) that incorporates Weinberger'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 these states and elucidate their structures.
DOI:10.48550/arxiv.2401.03373