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Amplitude analysis of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>γ</mml:mi><mml:mi>n</mml:mi><mml:mo>→</mml:mo><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:mi>p</mml:mi></mml:mrow></mml:math>data above 1 GeV
We report an extraction of nucleon resonance couplings using ${\ensuremath{\pi}}^{\ensuremath{-}}$ photoproduction cross sections on the neutron. The world database for the process $\ensuremath{\gamma}n\ensuremath{\rightarrow}{\ensuremath{\pi}}^{\ensuremath{-}}p$ above 1 GeV has quadrupled with the addition of differential cross sections from the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab in Hall B. Differential cross …