Extraction of N* information from the limited p(gamma,K+)Lambda data set

Abstract

Nucleon resonance information is often obtained from fitting hadrodynamical model calculations to data, where model parameters such as resonance coupling constants are the free parameters in the fitting procedure. For reactions with a limited data set, such as p(gamma, K+)Lambda, complications in the extraction of reliable N* information occur not only through theoretical uncertainties, but also due to technical difficulties in the fitting procedure. In this article we outline a fitting strategy based on a genetic algorithm and illustrate the kind of ambiguities which can arise.

8 pages, 6 figures, submitted to Phys. Lett. B

References in corpus (7)

• Evidence for a missing nucleon resonance in kaon photoproduction
• Baryon Resonance Extraction from piN Data using a Unitary Multichannel Model
• Vector meson production and nucleon resonance analysis in a coupled-channel approach for energies m_N < sqrt(s) < 2 GeV I: pion-induced results and hadronic parameters
• Vector meson production and nucleon resonance analysis in a coupled-channel approach for energies m_N < sqrt(s) < 2 GeV II: photon-induced results
• Gauge-invariant theory of pion photoproduction with dressed hadrons
• Kaon photoproduction: background contributions, form factors and missing resonances
• Form factors and photoproduction amplitudes

Cited by in corpus (21)

• Differential Cross Sections for gamma + p --> K+ + Y for Lambda and Sigma0 Hyperons
• First Measurement of Beam-Recoil Observables Cx and Cz in Hyperon Photoproduction
• A coupled-channel analysis of $K\Lambda$ production in the nucleon resonance region
• Dynamical coupled-channel approach to hadronic and electromagnetic production of kaon-hyperon on the proton
• Forward-angle K+ Lambda photoproduction in a Regge-plus-resonance approach
• A Profile Likelihood Analysis of the Constrained MSSM with Genetic Algorithms
• On photoexcitation of baryon antidecuplet
• Regge-plus-resonance treatment of the p(gamma,K^+)Sigma^0 and p(gamma,K^0)Sigma^+ reactions at forward kaon angles
• A Genetic Algorithm Analysis of N* Resonances in $p(\gamma ,K^{+})\Lambda$ Reactions
• Photoproduction of $K\Lambda$ on the proton
• Electroproduction of kaons from the proton in a Regge-plus-resonance approach
• Properties of Nucleon Resonances by means of a Genetic Algorithm
• $K^{+}\Lambda$ photoproduction at forward angles and low momentum transfer
• New fits to the reaction $\gamma p\to K^{+}\Lambda$
• Scaling and Resonances in Elementary K^+ Lambda Photoproduction
• Unexpected impact of D waves in low-energy neutral pion photoproduction from the proton and the extraction of multipoles
• Model discrimination in pseudoscalar-meson photoproduction
• Photon induced K$\Lambda$ production on the proton in the low energy region
• Ridge regression for minimizing the couplings of hyperon resonances in the $K^{+}\Lambda$ photoproduction
• Irreducible tensor approach to spin observables in photo production of mesons with arbitrary spin-parity $s^{\pi }$
• A Simple Quark Model for γp -> K^+ Λ^0