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10 papers · 2 filters
Generalization of the model-independent Laurent-Pietarinen single-channel pole-extraction formalism to multiple channels
Alfred Svarc, Mirza Hadzimehmedovic, Hedim Osmanovic +3
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 recent…
Analysis of recent CLAS data on photoproduction off a neutron target
Xiao-Yun Wang, Jun He, Helmut Haberzettl
Based on recent experimental data obtained by the CLAS Collaboration, the photoproduction off a neutron target at laboratory photon energies up to 2.5\,GeV is inves…
Nucleon Polarisabilities at and Beyond Physical Pion Masses
Harald W. Griesshammer, Judith A. McGovern, Daniel R. Phillips
We examine the results of Chiral Effective Field Theory (EFT) for the scalar- and spin-dipole polarisabilities of the proton and neutron, both for the physical pion mass and as…
Assessing Theory Uncertainties in EFT Power Countings from Residual Cutoff Dependence
Harald W. Griesshammer
I summarise a method to quantitatively assess the consistency of power-counting proposals in Effective Field Theories which are non-perturbative at leading order. It uses the fact…
Resonance Extraction from the SAID Analysis
Ron Workman, Alfred Svarc
Resonances are extracted from a number of energy-dependent and single-energy fits to scattering data. The influence of recent, precise EPECUR data is investigated. Results for the…
Compton Scattering and Nucleon Polarisabilities in Chiral EFT: Update and Future
Harald W. Griesshammer, Judith A. McGovern, Daniel R. Phillips
We review theoretical progress and prospects for determining the nucleon's static dipole polarisabilities from Compton scattering on few-nucleon targets, including new values; see…