Complete Experiments in Meson Photoproduction

Wunderlich, Y.

doi:10.1142/s2010194516600685

Cited by 1 publication

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References 6 publications

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“…Apart from the resonant multipoles, all other multipoles are termed as "background" deriving primarily from Born terms and from the tails of higher resonances [16]. Due to insufficient data [26,27] and limitations of the analysis techniques [28] multipole analyses up to now have been able to extract only few multipoles. Higher multipoles are either set to zero (truncated analysis) or use models to account for them (model dependent analysis).…”

Section: Introductionmentioning

confidence: 99%

On hadron deformation: A model independent extraction of EMR from pion photoproduction data

2018

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The multipole content of pion photoproduction at the ∆ + (1232) resonance has been extracted from a data set dominated by recent Mainz Microtron (MAMI) precision measurements. The analysis has been carried out in the Athens Model Independent Analysis Scheme (AMIAS), thus eliminating any model bias. The benchmark quantity for nucleon deformation,, was determined to be −2.5 ± 0.4 stat+syst , thus reconfirming in a model independent way that the conjecture of baryon deformation is valid. The derived multipole amplitudes provide stringent constraints on QCD simulations and QCD inspired models striving to describe hadronic structure. They are in good agreement with phenomenological models which explicitly incorporate pionic degrees of freedom and with lattice QCD calculations.PACS. 13.60.Rj -Baryon production 14.20.Gk -Baryon resonances (S = 0) 24.10.Lx Monte Carlo simulations 25.20.Lj Photoproduction reactions arXiv:1803.06283v3 [nucl-ex]

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Section: Introductionmentioning

confidence: 99%