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14 papers · 1 filter
The resonance as a genuine three-quark or molecular state
B. Golli, H. Osmanović, S. Širca
The mechanism for the formation of the resonance is studied in a chiral quark model that includes quark-meson as well as contact (four point) interactions. The negative-p…
Single-energy partial wave analysis for pion photoproduction with fixed-t analyticity
H. Osmanović, M. Hadžimehmedović, R. Omerović +5
Experimental data for pion photoproduction including differential cross sections and various polarization observables from four reaction channels, , , $γ…
Single-Energy Partial Wave Analysis for Photoproduction on Proton with Fixed- Analyticity Imposed
H. Osmanović, M. Hadžimehmedović, R. Omerović +7
High precision data of the reaction from its threshold up to ~GeV have been used in order to perform a single-energy partial wave analysis with minimal model de…
The role of angle dependent phase rotations of reaction amplitudes in photoproduction on protons
A. Švarc, H. Osmanović, M. Hadžimehmedović +6
It has recently been proven that the invariance of observables with respect to angle dependent phase rotations of reaction amplitudes mixes multipoles changing also their relative…
Eta and Etaprime Photoproduction on the Nucleon with the Isobar Model EtaMAID2018
L. Tiator, M. Gorchtein, V. L. Kashevarov +7
The isobar model EtaMAID has been updated with new and high precision data for eta and etaprime photoproduction on protons and neutrons from MAMI, ELSA, GRAAL and CLAS. The backgro…
From Experimental Data to Pole Parameters in a Direct Way (Angle Dependent Continuum Ambiguity and Laurent + Pietarinen Expansion)
A. Švarc, Y. Wunderlich, H. Osmanović +8
Unconstrained partial-wave amplitudes obtained at discrete energies from fits to complete sets of eight independent observables which are required to uniquely reconstruct reaction…