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26 April 2024 |
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Article overview
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Study for a model-independent pole determination of overlapping resonances | | Daniele Binosi
; Alessandro Pilloni
; Ralf-Arno Tripolt
; | | Date: |
5 May 2022 | | Abstract: | We apply a model-independent reconstruction method to experimental data in
order to identify complex poles of overlapping resonances. The algorithm is
based on the Schlessinger Point Method where data points are interpolated using
a continued-fraction expression. Statistical uncertainties of the experimental
data are propagated with resampling. In order to demonstrate the feasibility of
this method, we apply it to the $J/psi o gamma pi^0pi^0$ decay. We
benchmark the method on known analytic models, which allows us to estimate the
deviation from the true value. We then perform the pole extraction from BESIII
data, and identify the $f_0(1500)$, $f_0(1710)$, and $f_0(2020)$ scalar states.
Our results are in reasonable agreement with recent results, which suggests the
proposed method as a promising model-independent alternative for the
determination of resonance poles solely based on available experimental data. | | Source: | arXiv, 2205.02690 | | Services: | Forum | Review | PDF | Favorites | |
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