${{\boldsymbol N}}$ 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

${{\boldsymbol N}{(1440)}}$ $I(J^P)$ = $1/2(1/2^{+})$

Older and obsolete values are listed and referenced in the 2014 edition, Chinese Physics C38 070001 (2014).
${{\boldsymbol N}{(1440)}}$ POLE POSITION
REAL PART   $1360\text{ to }1380\text{ }(\approx1370) $ MeV 
$-2{\times }$IMAGINARY PART   $160\text{ to }190\text{ }(\approx175) $ MeV 
${{\boldsymbol N}{(1440)}}$ ELASTIC POLE RESIDUE
MODULUS $\vert \mathit r\vert $   $46\text{ to }54\text{ }(\approx50) $ MeV 
PHASE $\theta $   $-100\text{ to }-80\text{ }(\approx-90) $ $^\circ{}$ 
${{\boldsymbol N}{(1440)}}$ INELASTIC POLE RESIDUE
Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(1440)}}$ $\rightarrow$ ${{\mathit N}}{{\mathit \eta}}$
Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(1440)}}$ $\rightarrow$ ${{\mathit \Delta}}{{\mathit \pi}}$ , ${\mathit P}{\mathrm -wave}$
Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(1440)}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit K}}$
Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(1440)}}$ $\rightarrow$ ${{\mathit \Sigma}}{{\mathit K}}$
Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(1440)}}$ $\rightarrow$ ${{\mathit N}}$ (${{\mathit \pi}{\mathit \pi}}){}^{\mathit I = 0}_{{\mathit S}{\mathrm -wave}}$
${{\mathit N}{(1440)}}$ BREIT-WIGNER MASS   $1410\text{ to }1470\text{ }(\approx1440) $ MeV 
${{\mathit N}{(1440)}}$ BREIT-WIGNER WIDTH   $250\text{ to }450\text{ }(\approx350) $ MeV 
${{\boldsymbol N}{(1440)}}$ PHOTON DECAY AMPLITUDES AT THE POLE
${{\mathit N}{(1440)}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \gamma}}$ , helicity-1/2 amplitude A$_{1/2}$
${{\boldsymbol N}{(1440)}}$ BREIT-WIGNER PHOTON DECAY AMPLITUDES
${{\mathit N}{(1440)}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \gamma}}$ , helicity-1/2 amplitude A$_{1/2}$   $-0.080\text{ to }-0.050\text{ }(\approx-0.065) $ GeV${}^{−1/2}$ 
${{\mathit N}{(1440)}}$ $\rightarrow$ ${{\mathit n}}{{\mathit \gamma}}$ , helicity-1/2 amplitude A$_{1/2}$   $0.035\text{ to }0.055\text{ }(\approx0.045) $ GeV${}^{−1/2}$ 
The following branching fractions are our estimates, not fits or averages.
$\Gamma_{1}$ ${{\mathit N}}{{\mathit \pi}}$ $55 - 75\%$398
$\Gamma_{2}$ ${{\mathit N}}{{\mathit \eta}}$ $< 1 \%$-1
$\Gamma_{3}$ ${{\mathit N}}{{\mathit \pi}}{{\mathit \pi}}$ $17 - 50\%$347
$\Gamma_{4}$ ${{\mathit \Delta}{(1232)}}{{\mathit \pi}}$ , ${\mathit P}{\mathrm -wave}$ $6 - 27\%$147
$\Gamma_{5}$ ${{\mathit N}}{{\mathit \sigma}}$ $11 - 23\%$
$\Gamma_{6}$ ${{\mathit p}}{{\mathit \gamma}}$ , helicity=1/2 $0.035 - 0.048\%$414
$\Gamma_{7}$ ${{\mathit n}}{{\mathit \gamma}}$ , helicity=1/2 $0.02 - 0.04\%$413