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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: B066

${{\mathit N}{(1650)}}$ $I(J^P)$ = $1/2(1/2^{-})$

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

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▸  exp ${{\mathit N}{(1650)}}$ POLE POSITION

REAL PART 1650 TO 1680 $(\approx 1665 )$ MeV

$-2{\times }$IMAGINARY PART 100 TO 170 $(\approx 135 )$ MeV

▸  exp ${{\mathit N}{(1650)}}$ ELASTIC POLE RESIDUE

MODULUS $\vert \mathit r\vert $ 25 TO 55 $(\approx 45 )$ MeV

PHASE $\theta $ -80 TO -50 $(\approx -70 )$ $^\circ{}$

▸  exp ${{\mathit N}{(1650)}}$ INELASTIC POLE RESIDUE

Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(1650)}}$ $\rightarrow$ ${{\mathit N}}{{\mathit \eta}}$

Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(1650)}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit K}}$

Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(1650)}}$ $\rightarrow$ ${{\mathit \Sigma}}{{\mathit K}}$

Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(1650)}}$ $\rightarrow$ ${{\mathit \Delta}}{{\mathit \pi}}$, ${\mathit D}{\mathrm -wave}$

Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(1650)}}$ $\rightarrow$ ${{\mathit N}}{{\mathit \sigma}}$

Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(1650)}}$ $\rightarrow$ ${{\mathit N}{(1440)}}{{\mathit \pi}}$

${{\mathit N}{(1650)}}$ BREIT-WIGNER MASS 1635 TO 1665 $(\approx 1650 )$ MeV

${{\mathit N}{(1650)}}$ BREIT-WIGNER WIDTH 100 TO 150 $(\approx 125 )$ MeV

▸  exp ${{\mathit N}{(1650)}}$ PHOTON DECAY AMPLITUDES AT THE POLE

${{\mathit N}{(1650)}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \gamma}}$ , helicity-1/2 amplitude A$_{1/2}$

${{\mathit N}{(1650)}}$ $\rightarrow$ ${{\mathit n}}{{\mathit \gamma}}$ , helicity-1/2 amplitude A$_{1/2}$

▸  exp ${{\mathit N}{(1650)}}$ BREIT-WIGNER PHOTON DECAY AMPLITUDES

${{\mathit N}{(1650)}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \gamma}}$ , helicity-1/2 amplitude A$_{1/2}$ 0.035 TO 0.055 $(\approx 0.045 )$ GeV${}^{−1/2}$

${{\mathit N}{(1650)}}$ $\rightarrow$ ${{\mathit n}}{{\mathit \gamma}}$ , helicity-1/2 amplitude A$_{1/2}$ -0.040 TO 0.030 $(\approx -0.010 )$ GeV${}^{−1/2}$

${{\mathit N}{(1650)}}$ 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)   $\Gamma_{1}$ ${{\mathit N}}{{\mathit \pi}}$ $(50 - 70) \%$ 547   $\Gamma_{2}$ ${{\mathit N}}{{\mathit \eta}}$ $(15 - 35) \%$ 348   $\Gamma_{3}$ ${{\mathit \Lambda}}{{\mathit K}}$ $(5 - 15) \%$ 169   $\Gamma_{4}$ ${{\mathit N}}{{\mathit \pi}}{{\mathit \pi}}$ $(20 - 58) \%$ 514   $\Gamma_{5}$ ${{\mathit \Delta}{(1232)}}{{\mathit \pi}}$ , ${\mathit D}{\mathrm -wave}$ $(6 - 18) \%$ 345   $\Gamma_{6}$ ${{\mathit N}}{{\mathit \rho}}$ $(12 - 22) \%$ -1   $\Gamma_{7}$ ${{\mathit N}}{{\mathit \rho}}$ , $\mathit S$=1/2, ${\mathit S}{\mathrm -wave}$ <4 $\%$ -1   $\Gamma_{8}$ ${{\mathit N}}{{\mathit \rho}}$ , $\mathit S$=3/2, ${\mathit D}{\mathrm -wave}$ $(12 - 18) \%$ -1   $\Gamma_{9}$ ${{\mathit N}}{{\mathit \sigma}}$ $(2 - 18) \%$     $\Gamma_{10}$ ${{\mathit N}{(1440)}}{{\mathit \pi}}$ $(6 - 26) \%$ 150   $\Gamma_{11}$ ${{\mathit p}}{{\mathit \gamma}}$ , helicity=1/2 $(0.04 - 0.20) \%$ 558   $\Gamma_{12}$ ${{\mathit n}}{{\mathit \gamma}}$ , helicity=1/2 $(0.003 - 0.17) \%$ 557