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- W2080444310 abstract "Amplitudes for the reaction $pi^-pto Lambda K^0$ are reconstructed from data on the differential cross section $dsigma/dOmega$, the recoil polarization $P$, and on the spin rotation parameter $beta$. At low energies, no data on $beta$ exist, resulting in ambiguities. An approximation using $S$ and $P$ waves leads only to a fair description of the data on $dsigma/dOmega$ and $P$; in this case, there are two sets of amplitudes. Including $D$ waves, the data on $dsigma/dOmega$ and $P$ are well reproduced by the fit but now, there are several distinct solutions which describe the data with identical precision. In the range where the spin rotation parameter $beta$ was measured, a full and unambiguous reconstruction of the partial wave amplitudes is possible. The energy-independent amplitudes are compared to the energy dependent amplitudes which resulted from a coupled channel fit (BnGa2011-02) to a large data set including both pion and photo-induced reactions. Significant deviations are observed. Consistency between energy dependent and energy independent solutions by choosing the energy independent solution which is closest to the energy dependent solution. In a second step, the {it known} energy dependent solution for low (or high) partial waves is imposed and only the high (or low) partial waves are fitted leading to smaller uncertainties." @default.
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- W2080444310 date "2013-10-01" @default.
- W2080444310 modified "2023-10-14" @default.
- W2080444310 title "Study of ambiguities in π−p → ΛK0 scattering amplitudes" @default.
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- W2080444310 doi "https://doi.org/10.1140/epja/i2013-13121-9" @default.
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