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${{\mathit N}}$ 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 PDGID: B063

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

Older and obsolete values are listed and referenced in the 2014 edition, Chinese Physics C38 070001 (2014).

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▸  exp ${{\mathit N}{(1535)}}$ POLE POSITION

REAL PART 1500 TO 1520 $(\approx 1510 )$ MeV

$-2{\times }$IMAGINARY PART 80 TO 130 $(\approx 110 )$ MeV

▸  exp ${{\mathit N}{(1535)}}$ ELASTIC POLE RESIDUE

MODULUS $\vert \mathit r\vert $ 15 TO 35 $(\approx 25 )$ MeV

PHASE $\theta $ -40 TO 0 $(\approx -20 )$ $^\circ{}$

▸  exp ${{\mathit N}{(1535)}}$ 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 TO 1545 $(\approx 1530 )$ MeV

${{\mathit N}{(1535)}}$ BREIT-WIGNER WIDTH 125 TO 175 $(\approx 150 )$ MeV

▸  exp ${{\mathit N}{(1535)}}$ 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${}^{−1/2}$

▸  exp ${{\mathit N}{(1535)}}$ BREIT-WIGNER PHOTON DECAY AMPLITUDES

${{\mathit N}{(1535)}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \gamma}}$ , helicity-1/2 amplitude A$_{1/2}$ 0.090 TO 0.120 $(\approx 0.105 )$ GeV${}^{−1/2}$

${{\mathit N}{(1535)}}$ $\rightarrow$ ${{\mathit n}}{{\mathit \gamma}}$ , helicity-1/2 amplitude A$_{1/2}$ -0.095 TO -0.055 $(\approx -0.075 )$ GeV${}^{−1/2}$

${{\mathit N}{(1535)}}$ $\rightarrow$ ${{\mathit N}}{{\mathit \gamma}}$, ratio A${}^{{{\mathit n}}}_{1/2}/A{}^{{{\mathit p}}}_{1/2}$

${{\mathit N}{(1535)}}$ DECAY MODES
The following branching fractions are our estimates, not fits or averages.
Mode   Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/ Conf. Level P(MeV/c)   $\Gamma_{1}$ ${{\mathit N}}{{\mathit \pi}}$ $(32 - 52) \%$ 464   $\Gamma_{2}$ ${{\mathit N}}{{\mathit \eta}}$ $(30 - 55) \%$ 176   $\Gamma_{3}$ ${{\mathit N}}{{\mathit \pi}}{{\mathit \pi}}$ $(4 - 31) \%$ 422   $\Gamma_{4}$ ${{\mathit \Delta}{(1232)}}{{\mathit \pi}}$ , ${\mathit D}{\mathrm -wave}$ $(1 - 4) \%$ 240   $\Gamma_{5}$ ${{\mathit N}}{{\mathit \rho}}$ $(2 - 17) \%$ -1   $\Gamma_{6}$ ${{\mathit N}}{{\mathit \rho}}$ , $\mathit S$=1/2 , ${\mathit S}{\mathrm -wave}$ $(2 - 16) \%$ -1   $\Gamma_{7}$ ${{\mathit N}}{{\mathit \rho}}$ , $\mathit S$=3/2 , ${\mathit D}{\mathrm -wave}$ <1 $\%$ -1   $\Gamma_{8}$ ${{\mathit N}}{{\mathit \sigma}}$ $(2 - 10) \%$     $\Gamma_{9}$ ${{\mathit N}{(1440)}}{{\mathit \pi}}$ $(5 - 12) \%$ -1   $\Gamma_{10}$ ${{\mathit p}}{{\mathit \gamma}}$ , helicity=1/2 $(0.15 - 0.30) \%$ 477   $\Gamma_{11}$ ${{\mathit n}}{{\mathit \gamma}}$ , helicity=1/2 $(0.01 - 0.25) \%$ 477