${{\mathit N}}$ BARYONS
($\mathit S$ = 0, $\mathit I$ = 1/2)
${{\mathit p}}$, ${{\mathit N}^{+}}$ = ${\mathit {\mathit u}}$ ${\mathit {\mathit u}}$ ${\mathit {\mathit d}}$; ${{\mathit n}}$, ${{\mathit N}^{0}}$ = ${\mathit {\mathit u}}$ ${\mathit {\mathit d}}$ ${\mathit {\mathit d}}$ 		INSPIRE   JSON  (beta) PDGID:
B090

${{\mathit N}{(2220)}}$

$I(J^P)$ = $1/2(9/2^{+})$ 
Older and obsolete values are listed and referenced in the 2014 edition, Chinese Physics C38 070001 (2014).
${{\mathit N}{(2220)}}$ POLE POSITION
REAL PART   $2130\text{ to }2200\text{ }(\approx2150) $ MeV 
 
$-2{\times }$IMAGINARY PART   $360\text{ to }480\text{ }(\approx400) $ MeV 
 
${{\mathit N}{(2220)}}$ ELASTIC POLE RESIDUE
MODULUS $\vert \mathit r\vert $   $35\text{ to }60\text{ }(\approx45) $ MeV 
 
PHASE $\theta $   $-60\text{ to }-10\text{ }(\approx-40) $ $^\circ{}$ 
 
${{\mathit N}{(2220)}}$ INELASTIC POLE RESIDUE
Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(2220)}}$ $\rightarrow$ ${{\mathit N}}{{\mathit \eta}}$
Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(2220)}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit K}}$
Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(2220)}}$ $\rightarrow$ ${{\mathit \Sigma}}{{\mathit K}}$
${{\mathit N}{(2220)}}$ BREIT-WIGNER MASS   $2200\text{ to }2300\text{ }(\approx2250) $ MeV 
 
${{\mathit N}{(2220)}}$ BREIT-WIGNER WIDTH   $350\text{ to }500\text{ }(\approx400) $ MeV 
 
${{\mathit N}{(2220)}}$ PHOTON DECAY AMPLITUDES AT THE POLE
${{\mathit N}{(2220)}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \gamma}}$ , helicity-1/2 amplitude A$_{1/2}$
${{\mathit N}{(2220)}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \gamma}}$ , helicity-3/2 amplitude A$_{3/2}$
The following branching fractions are our estimates, not fits or averages.
$\Gamma_{1}$ ${{\mathit N}}{{\mathit \pi}}$   $15 - 30\%$ 924
 
FOOTNOTES