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arXiv · 1708.02041

Formation and Deformation of the $ψ(3770)$

Susana Coito·Francesco Giacosa
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Abstract

The form of resonance line-shapes unveils information about its nonperturbative properties and formation mechanisms. Here, we study the non-Breit-Wigner energy distribution of the resonance $ψ(3770)$ using an unitarized effective Lagrangian approach, that includes the effect of the nearby threshold $D^{+}D^{-}$. Two poles are found in the second Riemann sheet near the resonance amplitude. We discuss the setting of the free parameters and possible effects contributing to the signal.

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Susana Coito, Francesco Giacosa. 2018-01-10. Formation and Deformation of the $ψ(3770)$. https://doi.org/10.5506/aphyspolbsupp.10.1049

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