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The differential cross section for photoproduction of 1r + mesons from protons at an energy Ey = 230 MeV has been measured for center-of-mass angles of 0, 38, 82, 90, 116, 138, 146, and 180°. A magnetic spectrometer and a meson-stopping detector were used to identify mesons from momentum and range. stopped 1r+ mesons were detected by means of the 1r- p. decay. The statistical accuracy of the results is ±(3-4)% on the average. From comparison of the experimental data with theoretical calculations based on dispersion relations, we have estimated the value of the y1rp coupling constant, Ay1rp = (0.63 ± O.ll)ef.

2 data tables

Table 1

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Table 2

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BACKWARD PHOTOPRODUCTION OF POSITIVE PIONS ON HYDROGEN

Fischer, G. ; Fischer, H. ; Leneke, M. ; et al.

PI-1-100, 1970.

Inspire Record 1105110 DOI 10.17182/hepdata.37283

None

1 data table

Table 1

On the measurement of $\pi^{+}$ meson photoproduction from hydrogen near threshold

Lewis, G.M. ; Azuma, R.E. ;

Proc.Phys.Soc. 73 (1959) 873-880, 1959.

Inspire Record 1393355 DOI 10.17182/hepdata.26968

None

1 data table

Table 1

No description provided.

Measurement of the polarization of the recoil neutron from the photoproduction of charged pions on hydrogen

Althoff, K.H. ; Piel, H. ; Wallraff, W. ; et al.

Phys.Lett.B 26 (1968) 640-641, 1968.

Inspire Record 1099537 DOI 10.17182/hepdata.29335

The polarization of the recoil neutron in the reaction γ + p → π + + n has been measured for a pion c.m.-angle of 90° and a photon energy of 390 MeV. Hydrogen was used as the polarization analyser.

1 data table

Table 1

No description provided.

Asymmetry ratios in the photoproduction of π + by linearly polarized γ-rays in the energy range 200–400 MeV

Gorenstein, P. ; Grilli, M. ; Soso, F. ; et al.

Phys.Lett. 23 (1966) 394-396, 1966.

Inspire Record 1392866 DOI 10.17182/hepdata.30179

The asymmetry ratio for the process γ + p → n + π + by linearly polarized γ rays are reported for E γ = 200 − 400 MeV and for θ (production angle of π in the c.m. system) = 90°. The experimental results are compared with some recent theoretical predictions.

4 data tables

Table 1

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Table 2

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Table 3

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