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Precise measurements of the differential cross sections on the π − p→ π 0 n charge exchange scattering have been performed at six incident beam momenta of 1969, 2172, 2370, 2569, 2767 and 2965 MeV/ c covering a wide angular range of −0.95 < cos θ π ∗ < 0.95, where θ π ∗ is an emission angle of π 0 meson in the c.m.s. The results are compared with predictions of recent partial wave analyses.
Total cross sections obtained by fitting the Legendre polynomials to the DCS data.
Statistical errors only. Cos(theta) bin width is +- 0.025.
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The contribution of possible intranuclear secondary processes (interactions of secondary mesons with nucleons and few-nucleon systems, interactions of Δ-resonances with nucleons) to cumulative proton production in π − c interactions at 5 GeV/ c is studied. It has been found that the contribution of secondary processes makes nearly half of the inclusive cross section of cumulative proton production at momenta p p ⩽ 0.75 GeV/ c .
FIRST PROTON (P=3) IS CUMULATIVE, MODEL DEPENDENT ESTIMATION.
FIRST PROTON (P=3) IS CUMULATIVE, MODEL DEPENDENT ESTIMATION.
We have measured the difference between the pp total cross sections for parallel and antiparallel longitudinal spin states at beam momenta of 2.75, 2.92, 3.25, and 3.48 GeV/c. These results reveal possible new structure in this momentum range.
Data read from graph. Statistical errors only.
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