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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

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Photoproduction of positive pions between 200 and 260 MeV at fixed momentum transfer

Althoff, K. ;

Z.Phys. 175 (1963) 34-36, 1963.

Inspire Record 1385257 DOI 10.17182/hepdata.16670

Mit einem magnetischen Spektrometer wurde der differentielle Wirkungsquerschnitt fiir die Reaktion 7 + P = ~+ + n bei Photonenergien zwischell 200 und 260 MeV gemessell. Die kinetischen Variablell wurdeI1 dabei so gew~hlt, dag der all das Meson tibertragene Impuls jeweils dem Weft an der Produktionsschwelle gleich ist. Bisher vermutete Abweichungen yon der Theorie kollnten nicht bestSMgt werden.

1 data table

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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

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

Productions of $\pi^{+}$ photomesons at angles of 25-36° in the 152-162 MeV interval

Photoproduction of positive pions in hydrogen near threshold

Forward peak in $\pi^+$ photoproduction

Photoproduction of charged pions near threshold

Differential cross sections for the photoproduction of mesons on protons in the photon energy interval 165-230 MeV

Determination of the γ - π - ρ coupling constant from the −/+ ratio for photoproduction from deuterium

Photoproduction of $\pi^+$ Mesons from Protons at $E_\gamma = 230$ MeV and Determination of the $\gamma\pi\rho$ coupling Constant

Photoproduction of positive pions between 200 and 260 MeV at fixed momentum transfer

Photoproduction of positive pions on hydrogen between 200 and 450 MeV