GAMMA P --> PI+ N
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HIGH-ENERGY PHOTOPRODUCTION OF CHARGED PIONS AT BACKWARD ANGLES

Anderson, Robert L. ; Gustavson, D. ; Johnson, J.R. ; et al.
Phys.Rev.Lett. 23 (1969) 721-724, 1969.
Inspire Record 245 DOI 10.17182/hepdata.559

Measurements on large-angle photoproduction of π+ mesons from hydrogen have been made at the Stanford Linear Accelerator Center for photon energies between 5 and 15.5 GeV and u values from +0.05 to -1.8 (GeV/c)2. The measured cross section decreased with energy approximately as k−3, showing no shrinkage in this range of u values. Furthermore, it had a smooth u dependence with no sign of a dip at u≃−0.15 (GeV/c)2 as would be expected from nucleon exchange. π−Δ++ production was measured at 5 GeV and shows a rapid decrease with increasing |u|.

6 data tables
Table 1

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Table 2

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Table 3

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Measurements of Exclusive Photoproduction Processes at Large Values of t and u from 4-GeV to 7.5-GeV

Anderson, Robert L. ; Gustavson, D. ; Ritson, D. ; et al.
Phys.Rev.D 14 (1976) 679, 1976.
Inspire Record 108061 DOI 10.17182/hepdata.4592

Exclusive photoproduction cross sections have been measured for the processes γp→π+n, γp→π0p, γp→π−Δ++, γp→ρ0p, γp→K+Λ, and γp→K+Σ0 at large t and u values at several energies for each process between 4 and 7.5 GeV. These measurements taken together with past data taken at small values of t and u provide complete angular distributions. The data show the usual small t and u peaks and a central region in which the cross section decreases approximately as s−7. The results are discussed within the context of parton or constituent models.

18 data tables
Table 1

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Table 2

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Table 3

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Photoproduction of charged pions near threshold

Adamovich, M.I. ; Gorzhevskaya, É.G. ; Larionova, V.G. ; et al.
Sov.Phys.JETP 11 (1960) 779-782, 1960.
Inspire Record 1392962 DOI 10.17182/hepdata.71292

None

12 data tables
Table 1

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Table 2

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Table 3

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

Aleksandrov, Yu.M. ; Grushin, V.F. ; Zapevalov, V.A. ; et al.
Zh.Eksp.Teor.Fiz. 49 (1965) 54-65, 1965.
Inspire Record 1387583 DOI 10.17182/hepdata.71192

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

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.


Forward peak in $\pi^+$ photoproduction

Buschhorn, G. ; Heide, P. ; Kötz, U. ; et al.
Phys.Lett.B 25 (1967) 622-623, 1967.
Inspire Record 1392927 DOI 10.17182/hepdata.29549

The π+—photoproduction cross section is found to have a peak in the forward direction in disagreement with simple Regge pole models.

1 data table
Table 1

No description provided.


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

Adamovich, M.I. ; Gorzhevskaya, É.G. ; Yagudina, F.R. ;
Sov.Phys.JETP 16 (1963) 786-788, 1963.
Inspire Record 1393124 DOI 10.17182/hepdata.39797

None

1 data table
Table 1

No description provided.


Photoproduction of positive pions in hydrogen near threshold

Gorzhevskaya, É.G. ; Popova, V.M. ; Yagudina, F.R. ;
Sov.Phys.JETP 11 (1960) 200-201, 1960.
Inspire Record 1392963 DOI 10.17182/hepdata.39802

None

1 data table
Table 1

No description provided.


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

Adamovich, M.I. ; Larionova, V.G. ; Kharlamov, S.P. ; et al.
Sov.J.Nucl.Phys. 7 (1968) 360-365, 1968.
Inspire Record 1392568 DOI 10.17182/hepdata.18930

None

14 data tables
Table 1

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