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Photoproduction of positive pions on hydrogen between 200 and 450 MeV

Freitag, C. ; Freytag, D. ; Luebelsmeyer, K. ; et al.

Z.Phys. 175 (1963) 1-18, 1963.

Inspire Record 1385258 DOI 10.17182/hepdata.16693

Die Reaktionγ+p→π ++n für Photonenergien zwischen 200 MeV und 450 MeV wurde mit einem Reichweiteteleskop am Bonner 500 MeV Elektronen Synchrotron untersucht. Es wurden Anregungskurven für die Laborwin

3 data tables

Table 1

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Table 3

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Negative-to-Positive Ratio of Photomesons from Deuterium

Sands, Matthew ; Teasdale, J.G. ; Walker, Robert L. ;

Phys.Rev. 95 (1954) 592-593, 1954.

Inspire Record 944931 DOI 10.17182/hepdata.589

None

2 data tables

Table 1

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Table 2

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Angular Distributions of Photopions from Hydrogen

Knapp, Edward A. ; Kenney, Robert W. ; Perez-Mendez, Victor ;

Phys.Rev. 114 (1959) 605-611, 1959.

Inspire Record 944992 DOI 10.17182/hepdata.26850

An accurate measurement of the differential cross section for the photoproduction of positive pions from protons has been made at the Berkeley synchrotron for photon energies of 260 and 290 Mev. The mesons were produced in a thin-walled liquid-hydrogen target, and the meson-detection apparatus utilized the characteristic decay of the pion. The measurements were done in two steps, from 0° to 50° with equipment specifically designed to reduce a very high forward-angle positron background, and from 30° to 160° with equipment whose efficiency and solid angle could be accurately determined. The abrupt flattening of the observed cross section in the region forward of 40° is due to "photoelectric ejection" of pions from the cloud surrounding the nucleon. The results are compared to the theory of photo-production derived from the dispersion relations, and the agreement is satisfactory within the limitations of the theory.

2 data tables

Table 1

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Table 2

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