${{\boldsymbol N}}$ BARYONS
($\boldsymbol S$ = 0, $\boldsymbol I$ = 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 search

${{\boldsymbol N}{(1535)}}$ $I(J^P)$ = $1/2(1/2^{-})$

Older and obsolete values are listed and referenced in the 2014 edition, Chinese Physics C38 070001 (2014).
${{\boldsymbol N}{(1535)}}$ POLE POSITION
REAL PART   $1500\text{ to }1520\text{ }(\approx1510) $ MeV 
$-2{\times }$IMAGINARY PART   $110\text{ to }150\text{ }(\approx130) $ MeV 
${{\boldsymbol N}{(1535)}}$ ELASTIC POLE RESIDUE
MODULUS $\vert \mathit r\vert $   $15\text{ to }35\text{ }(\approx25) $ MeV 
PHASE $\theta $   $-30\text{ to }0\text{ }(\approx-15) $ $^\circ{}$ 
${{\boldsymbol N}{(1535)}}$ INELASTIC POLE RESIDUE
Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(1535)}}$ $\rightarrow$ ${{\mathit N}}{{\mathit \eta}}$
Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(1535)}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit K}}$
Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(1535)}}$ $\rightarrow$ ${{\mathit \Sigma}}{{\mathit K}}$
Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(1535)}}$ $\rightarrow$ ${{\mathit \Delta}}{{\mathit \pi}}$ , ${\mathit D}{\mathrm -wave}$
Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(1535)}}$ $\rightarrow$ ${{\mathit N}}{{\mathit \sigma}}$
Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(1535)}}$ $\rightarrow$ ${{\mathit N}{(1440)}}{{\mathit \pi}}$
${{\mathit N}{(1535)}}$ BREIT-WIGNER MASS   $1515\text{ to }1545\text{ }(\approx1530) $ MeV 
${{\mathit N}{(1535)}}$ BREIT-WIGNER WIDTH   $125\text{ to }175\text{ }(\approx150) $ MeV 
${{\boldsymbol N}{(1535)}}$ PHOTON DECAY AMPLITUDES AT THE POLE
${{\mathit N}{(1535)}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \gamma}}$ , helicity-1/2 amplitude A$_{1/2}$
${{\mathit N}{(1535)}}$ $\rightarrow$ ${{\mathit n}}{{\mathit \gamma}}$ , helicity-1/2 amplitude A$_{1/2}$   $-0.088 \pm0.004$ GeV${}^{−1/2}$ 
${{\boldsymbol N}{(1535)}}$ BREIT-WIGNER PHOTON DECAY AMPLITUDES
${{\mathit N}{(1535)}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \gamma}}$ , helicity-1/2 amplitude A$_{1/2}$   $0.090\text{ to }0.120\text{ }(\approx0.105) $ GeV${}^{−1/2}$ 
${{\mathit N}{(1535)}}$ $\rightarrow$ ${{\mathit n}}{{\mathit \gamma}}$ , helicity-1/2 amplitude A$_{1/2}$   $-0.095\text{ to }-0.055\text{ }(\approx-0.075) $ GeV${}^{−1/2}$ 
${{\mathit N}{(1535)}}$ $\rightarrow$ ${{\mathit N}}{{\mathit \gamma}}$ , ratio A${}^{{{\mathit n}}}_{1/2}/A{}^{{{\mathit p}}}_{1/2}$
The following branching fractions are our estimates, not fits or averages.
$\Gamma_{1}$ ${{\mathit N}}{{\mathit \pi}}$ $32 - 52\%$464
$\Gamma_{2}$ ${{\mathit N}}{{\mathit \eta}}$ $30 - 55\%$176
$\Gamma_{3}$ ${{\mathit N}}{{\mathit \pi}}{{\mathit \pi}}$ $3 - 14\%$422
$\Gamma_{4}$ ${{\mathit \Delta}{(1232)}}{{\mathit \pi}}$ 240
$\Gamma_{5}$ ${{\mathit \Delta}{(1232)}}{{\mathit \pi}}$ , ${\mathit D}{\mathrm -wave}$ $1 - 4\%$240
$\Gamma_{6}$ ${{\mathit N}}{{\mathit \sigma}}$ $2 - 10\%$
$\Gamma_{7}$ ${{\mathit N}{(1440)}}{{\mathit \pi}}$ $5 - 12\%$-1
$\Gamma_{8}$ ${{\mathit p}}{{\mathit \gamma}}$ , helicity=1/2 $0.15 - 0.30\%$477
$\Gamma_{9}$ ${{\mathit n}}{{\mathit \gamma}}$ , helicity=1/2 $0.01 - 0.25\%$477