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arXiv · 1306.6308

Padé Approximants and Resonance Poles

P. Masjuan·J. J. Sanz-Cillero
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Abstract

Based on the mathematically well defined Padé Theory, a theoretically safe new procedure for the extraction of the pole mass and width of a resonance is proposed. In particular, thanks to the Montessus de Ballore theorem we are able to unfold the Second Riemann Sheet of an amplitude to search for the position of the resonant pole in the complex plane. The method is systematic and provides a model-independent treatment of the prediction and the corresponding errors of the approximation.

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P. Masjuan, J. J. Sanz-Cillero. 2013-06-26. Padé Approximants and Resonance Poles. https://doi.org/10.1140/epjc%2Fs10052-013-2594-4

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