Preliminary results on the determination of the position and shape of the ϱ-meson resonance with electron-positron colliding beams are presented.
FITTED PEAK CROSS SECTION IS 1.2 +- 0.2 MUB.
Measured value of the pion form factor
Fitted peak cross section.
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Axis error includes +- 0.0/0.0 contribution (?////NOT GIVEN).
The reaction π−A→Aπ− γ at 40 GeV/c was studied on “Sigma” spectrometer on six different nuclear targets in the region of four-momentum transfer |t|<0.05 (GeV/c)2. A phenomenon of elastic scattering of pions on the nuclear Coulomb field photons was observed, its total and differential cross sections were measured. The cross section of Compton effect on π−-meson was measured.
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RADIATIVE CORRECTIONS APPLIED.