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REAL PART
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$1360\text{ to }1380\text{ }(\approx1370) $ MeV
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$-2{\times }$IMAGINARY PART
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$180\text{ to }205\text{ }(\approx190) $ MeV
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MODULUS $\vert \mathit r\vert $
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$50\text{ to }60\text{ }(\approx55) $ MeV
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PHASE $\theta $
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$-100\text{ to }-80\text{ }(\approx-90) $ $^\circ{}$
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Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(1440)}}$ $\rightarrow$ ${{\mathit N}}{{\mathit \eta}}$
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Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(1440)}}$ $\rightarrow$ ${{\mathit \Delta}}{{\mathit \pi}}$, ${\mathit P}{\mathrm -wave}$
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Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(1440)}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit K}}$
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Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(1440)}}$ $\rightarrow$ ${{\mathit \Sigma}}{{\mathit K}}$
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Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit N}{(1440)}}$ $\rightarrow$ ${{\mathit N}}$ (${{\mathit \pi}{\mathit \pi}}){}^{\mathit I = 0}_{{\mathit S}{\mathrm -wave}}$
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${{\mathit N}{(1440)}}$ BREIT-WIGNER MASS
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$1410\text{ to }1470\text{ }(\approx1440) $ MeV
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${{\mathit N}{(1440)}}$ BREIT-WIGNER WIDTH
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$250\text{ to }450\text{ }(\approx350) $ MeV
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${{\mathit N}{(1440)}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \gamma}}$ , helicity-1/2 amplitude A$_{1/2}$
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${{\mathit N}{(1440)}}$ $\rightarrow$ ${{\mathit n}}{{\mathit \gamma}}$ , helicity-1/2 amplitude A$_{1/2}$
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${{\mathit N}{(1440)}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \gamma}}$ , helicity-1/2 amplitude A$_{1/2}$
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$-0.080\text{ to }-0.050\text{ }(\approx-0.065) $ GeV${}^{−1/2}$
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${{\mathit N}{(1440)}}$ $\rightarrow$ ${{\mathit n}}{{\mathit \gamma}}$ , helicity-1/2 amplitude A$_{1/2}$
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$0.035\text{ to }0.055\text{ }(\approx0.045) $ GeV${}^{−1/2}$
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The following branching fractions are our estimates, not fits or averages.
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Mode |
Fraction ($\Gamma_i$ / $\Gamma$) |
Scale Factor/ Conf. Level |
P (MeV/c) |
$\Gamma_{1}$ | ${{\mathit N}}{{\mathit \pi}}$ | |
$55 - 75\%$
| | 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 |
| $\Gamma_{5}$ | ${{\mathit N}}{{\mathit \sigma}}$ | |
$11 - 23\%$
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| $\Gamma_{6}$ | ${{\mathit p}}{{\mathit \gamma}}$ , helicity=1/2 | |
$0.035 - 0.048\%$
| | 414 |
| $\Gamma_{7}$ | ${{\mathit n}}{{\mathit \gamma}}$ , helicity=1/2 | |
$0.02 - 0.04\%$
| | 413 |
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