Amplitude analysis of gamma n --> pi- p data above 1 GeV

Abstract

We report a new extraction of nucleon resonance couplings using pi- photoproduction cross sections on the neutron. The world database for the process gamma n --> pi- p above 1 GeV has quadrupled with the addition of new differential cross sections from the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab in Hall B. Differential cross sections from CLAS have been improved with a new final-state interaction determination using a diagramatic technique taking into account the NN and piN final-state interaction amplitudes. Resonance couplings have been extracted and compared to previous determinations. With the addition of these new cross sections, significant changes are seen in the high-energy behavior of the SAID cross sections and amplitudes.

11 pages, 7 figures, 2 tables

References in corpus (7)

• Unitary Isobar Model - MAID2007
• Extended Partial-Wave Analysis of piN Scattering Data
• Updated analysis of NN elastic scattering to 3 GeV
• Electroexcitation of nucleon resonances
• Extracting the photoproduction cross section off the neutron gn-->pi-p from deuteron data with FSI effects
• Updated SAID analysis of pion photoproduction data
• Beam asymmetry $\Sigma$ measurements on the ${\pi }^{-}$ photoproduction off neutrons

Cited by in corpus (19)

• Dynamical coupled-channels model for neutrino-induced meson productions in resonance region
• Photocouplings at the Pole from Pion Photoproduction
• Light Baryon Spectroscopy
• Photoproduction Reactions and Non-Strange Baryon Spectroscopy
• Helicity amplitudes for photoexcitation of nucleon resonances off neutrons
• Determination of exotic hadron structure by constituent-counting rule for hard exclusive processes
• Finite volume effects and quark mass dependence of the N(1535) and N(1650)
• Photoproduction of pi0-mesons off neutrons in the nucleon resonance region
• Cross Section for $\gamma n\to {\pi }^{0}n$ measured at Mainz/A2
• Differential Cross Section Measurements for $\gamma n\to {\pi }^{-}p$ Above the First Nucleon Resonance Region
• Evaluation of the gn-->pi-p differential cross sections in the Delta-isobar region
• Measurement of the beam-helicity asymmetry $I^{\odot }$ in the photoproduction of ${\pi }^0{\pi }^{\pm }$-pairs off protons and off neutrons
• Neutral pion photoproduction on the nucleon in a chiral quark model
• On the Photoproduction Reactions $\gamma d\to \pi NN$
• Photoproduction of {\boldmath{${\pi }^0$}} Mesons off Protons and Neutrons in the Second and Third Nucleon Resonance Region
• Extraction of $\gamma n\to \pi N$ observables from deuteron-target data
• Single-energy partial wave analysis for pion photoproduction with fixed-t analyticity
• SAID Analysis of Meson Photoproduction : Determination of Neutron and Proton EM Couplings
• The neutron anomaly in the gamma N --> eta N cross section through the looking glass of the flavour SU(3) symmetry