Fixed-t analyticity as a constraint in single-energy partial-wave analyses of meson photoproduction reactions - INSPIRE

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Fixed-t analyticity as a constraint in single-energy partial-wave analyses of meson photoproduction reactions

H. Osmanović
(
- Tuzla U.
)
,
M. Hadžimehmedović
(
- Tuzla U.
)
,
R. Omerović
(
- Tuzla U.
)
,
J. Stahov
(
- Tuzla U.
)
,
V. Kashevarov
(
- Mainz U., Inst. Kernphys.
)

Jul 25, 2017

24 pages

Published in:

Phys.Rev.C 97 (2018) 1, 015207

Published: Feb 1, 2018

e-Print:

1707.07891 [nucl-th]

DOI:

10.1103/PhysRevC.97.015207

View in:

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Abstract: (APS)

Partial-wave amplitudes of meson photoproduction reactions are an important source of information in baryon spectroscopy. We investigate a new approach in single-energy partial-wave analyses of these reactions. Instead of using a constraint to theoretical models in order to achieve solutions which are continuous in energy, we enforce the analyticity of the amplitudes at fixed values of the Mandelstam variable t. We present an iterative procedure with successive fixed-t amplitude analyses which constrain the single-energy partial-wave analyses and apply this method to the γp→ηp reaction. We use pseudodata, generated by the EtaMAID model, to test the method and to analyze ambiguities. Finally, we present an analytically constrained partial-wave analysis using experimental data for four polarization observables recently measured at MAMI and GRAAL in the energy range from threshold to s=1.85 GeV.

Note:

46 pages, 24 figures

13.60.Le
14.20.Gk
11.80.Et
meson: photoproduction
baryon: hadron spectroscopy
partial wave
analytic properties
partial wave analysis
polarization
Mainz Linac

References(52)

Figures(70)

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