${{\mathit \Delta}{(1232)}}$ 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).

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

INSPIRE search
VALUE DOCUMENT ID TECN  COMMENT
• • We do not use the following data for averages, fits, limits, etc. • •
$0.065$ $\pm0.007$
ARNDT
1997
DPWA ${{\mathit \gamma}}$ ${{\mathit N}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit N}}$
$0.058$
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