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${{\mathit \Delta}{(1232)}}$ BREIT-WIGNER PHOTON DECAY AMPLITUDES

Papers on ${{\mathit \gamma}}{{\mathit N}}$ amplitudes predating 1981 may be found in our 2006 edition, Journal of Physics G33 1 (2006).

${{\mathit \Delta}{(1232)}}$ $\rightarrow$ ${{\mathit N}}{{\mathit \gamma}}$ , phase of ${{\mathit E}_{{2}}}$ /${{\mathit M}_{{1}}}$ ratio at pole

INSPIRE  

VALUE DOCUMENT ID TECN  COMMENT • • We do not use the following data for averages, fits, limits, etc. • • $-122$ $\pm5$ ARNDT 1997 DPWA ${{\mathit \gamma}}$ ${{\mathit N}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit N}}$ $-127.2$ HANSTEIN 1996 DPWA ${{\mathit \gamma}}$ ${{\mathit N}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit N}}$

References:

ARNDT 1997 PR C56 577 Pion Photoproduction in the ${{\mathit \Delta}}$ Resonance Region HANSTEIN 1996 PL B385 45 The Position and the Residues of the ${{\mathit \Delta}}$ Resonance Pole in Pion Photoproduction

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