Generalization of the model-independent Laurent–Pietarinen single-channel pole-extraction formalism to multiple channels - INSPIRE

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Generalization of the model-independent Laurent–Pietarinen single-channel pole-extraction formalism to multiple channels

Alfred Švarc
(
- Boskovic Inst., Zagreb
)
,
Mirza Hadžimehmedović
(
- Tuzla U.
)
,
Hedim Osmanović
(
- Tuzla U.
)
,
Jugoslav Stahov
(
- Tuzla U.
)
,
Lothar Tiator
(
- Mainz U., Inst. Phys.
)

Dec 23, 2015

4 pages

Published in:

Phys.Lett.B 755 (2016) 452-455

Published: Apr 10, 2016

e-Print:

1512.07403 [nucl-th]

DOI:

10.1016/j.physletb.2016.02.058

View in:

ADS Abstract Service

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Abstract: (Elsevier)

A method to extract resonance pole information from single-channel partial-wave amplitudes based on a Laurent (Mittag-Leffler) expansion and conformal mapping techniques has recently been developed. This method has been applied to a number of reactions and provides a model-independent extraction procedure which is particularly useful in cases where a set of amplitudes is available only at discrete energies. This method has been generalized and applied to the case of a multi-channel fit, where several sets of amplitudes are analyzed simultaneously. The importance of unitarity constraints is discussed. The final result provides a powerful, model-independent tool for analyzing partial-wave amplitudes of coupled or connected channels based entirely on the concepts of analyticity and unitarity.

Partial wave analysis
Pole parameters
Model independent extraction
resonance: pole
unitarity: constraint
analytic properties
partial wave
conformal

References(20)

Figures(4)

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