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- W2050874634 startingPage "1466" @default.
- W2050874634 abstract "Various combinations of poles and resonances have been tried to determine just which combinations yield reasonable fits to the total and differential cross-section data for the process $ensuremath{gamma}+pensuremath{rightarrow}ensuremath{eta}+p$. In each case the best values of the parameters have been obtained by minimizing ${ensuremath{chi}}^{2}$. Excellent fits ($frac{{ensuremath{chi}}^{2}}{N}ensuremath{approx}0.8$) are obtained for certain combinations of poles and resonances. All solutions with the ${S}_{11}(1570)$ resonance omitted have rather poor values of ${ensuremath{chi}}^{2}$, and the ${P}_{11}(1400)$ resonance cannot be used in lieu of the ${S}_{11}(1570)$ in this process. Evidence is obtained for classifying the ${F}_{15}(1688)$ as a member of an octet rather than a 27-plet. For all the models considered here, the value of the $ensuremath{eta}$-nucleon coupling constant ($frac{{{g}_{ensuremath{eta}}}^{2}}{4ensuremath{pi}}$) is less than 2, indicating a $frac{D}{F}$ ratio larger than $frac{3}{2}$." @default.
- W2050874634 created "2016-06-24" @default.
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- W2050874634 date "1967-09-25" @default.
- W2050874634 modified "2023-09-28" @default.
- W2050874634 title "Poles and Resonances in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>η</mml:mi></mml:math>Photoproduction" @default.
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- W2050874634 doi "https://doi.org/10.1103/physrev.161.1466" @default.
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