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${{\mathit N}{(1680)}}$ BREIT-WIGNER PHOTON DECAY AMPLITUDES

${{\mathit N}{(1680)}}$ $\rightarrow$ ${{\mathit n}}{{\mathit \gamma}}$ , helicity-1/2 amplitude A$_{1/2}$

INSPIRE   PDGID:

B065A3

VALUE (GeV${}^{−1/2}$) DOCUMENT ID TECN  COMMENT $\bf{ 0.020\text{ to }0.040\text{ }(\approx0.030) }$ OUR ESTIMATE $0.005$ $\pm0.004$ 1 HUNT 2019 DPWA Multichannel $0.034$ $\pm0.006$ ANISOVICH 2013 B DPWA Multichannel $0.026$ $\pm0.004$ 1 CHEN 2012 A DPWA ${{\mathit \gamma}}$ ${{\mathit N}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit N}}$ • • We do not use the following data for averages, fits, limits, etc. • • $0.029$ $\pm0.002$ 1 SHRESTHA 2012 A DPWA Multichannel $0.028$ DRECHSEL 2007 DPWA ${{\mathit \gamma}}$ ${{\mathit N}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit N}}$ 1  Statistical error only.

References:

HUNT 2019 PR C99 055205 Updated determination of $N^*$ resonance parameters using a unitary, multichannel formalism ANISOVICH 2013B EPJ A49 67 Helicity Amplitudes for Photoexcitation of Nucleon Resonances off Neutrons CHEN 2012A PR C86 015206 Amplitude Analysis of ${{\mathit \gamma}}$ ${{\mathit n}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit p}}$ Data above 1 GeV SHRESTHA 2012A PR C86 055203 Multichannel Parametrization of ${{\mathit \pi}}{{\mathit N}}$ Scattering Amplitudes and Extraction of Resonance Parameters DRECHSEL 2007 EPJ A34 69 Unitary Isobar Model $−$ MAID2007

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