Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Extracting resonance poles from numerical scattering data: type-II
  Pad\`e reconstruction   We present a FORTRAN 77 code for evaluation of resonance pole positions and
residues of a numerical scattering matrix element in the complex energy (CE) as
well as in the complex angular momentum (CAM) planes. Analytical continuation
of the S-matrix element is performed by constructing a type-II Pad\'e
approximant from given physical values [Bessis et al (1994); Vrinceanu et al
(2000); Sokolovski and Msezane (2004)] . The algorithm involves iterative
"preconditioning" of the numerical data by extracting its rapidly oscillating
potential phase component. The code has the capability of adding non-analytical
noise to the numerical data in order to select "true" physical poles,
investigate their stability and evaluate the accuracy of the reconstruction. It
has an option of employing multiple-precision (MPFUN) package [Bailey (1993)]
developed by D. H. Bailey wherever double precision calculations fail due to a
large number of input partial wave (energies) involved. The package has been
successfully tested on several models, as well as theF+H2->HF+H,F+HD->HF
+D,Cl+HCl->ClH+Cl and H+D2->HD+D reactions. Some detailed examples are given in
the text. PACS:34.50.Lf,34.50.Pi

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The categories of this paper are: ao-sci
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The categories of this paper are: funct-an
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The categories of this paper are: hep-ex
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The categories of this paper are: nucl-th
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The categories of this paper are: q-alg
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The categories of this paper are: alg-geom
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The categories of this paper are: cmp-lg
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: math-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: solv-int
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The categories of this paper are: eess
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The categories of this paper are: patt-sol
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The categories of this paper are: acc-phys
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The categories of this paper are: bayes-an