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- W3042621207 startingPage "1777" @default.
- W3042621207 abstract "The backward angular distributions obtained in an experiment at the Zero Gradient Synchrotron of Argonne National Laboratory were used to systematically study the energy dependence of the 180ifmmode^circelsetextdegreefi{} differential cross section for ${ensuremath{pi}}^{+}p$ elastic scattering in the center-of-mass energy region from 2159 to 3487 MeV. At each of 38 incident pion momenta between 2.0 and 6.0 GeV/c, a focusing spectrometer and scintillation counter hodoscopes were used to obtain differential cross sections for typically five pion scattering angles from 141ifmmode^circelsetextdegreefi{} to 173ifmmode^circelsetextdegreefi{} in the laboratory. Values for $frac{densuremath{sigma}}{densuremath{Omega}}$ at 180ifmmode^circelsetextdegreefi{} were then obtained by extrapolation. A resonance model and an interference model were used to perform fits to the energy dependence of $frac{densuremath{sigma}}{densuremath{Omega}}$ (180ifmmode^circelsetextdegreefi{}). Both models led to good fits to our data and yielded values for the masses, widths, parities, and the product of spin and elasticity for the $ensuremath{Delta}(2200)$, $ensuremath{Delta}(2420)$, $ensuremath{Delta}(2850)$, and $ensuremath{Delta}(3230)$ resonances. Our data confirm the existence of the $ensuremath{Delta}(3230)$ and require the negative-parity $ensuremath{Delta}(2200)$." @default.
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- W3042621207 title "<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow><mml:mi>p</mml:mi></mml:math>backward elastic scattering from 2 to 6 GeV/<i>c</i>" @default.
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- W3042621207 doi "https://doi.org/10.1103/physrevd.11.1777" @default.
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