Kern, W.
GAMMA N --> PI- P
Photoproduction
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Pi+ photoproduction from hydrogen with polarized photons

Bar-Yam, Z. ; De Pagter, J. ; Dowd, J. ; et al.
Phys.Rev.Lett. 25 (1970) 1053-1056, 1970.
Inspire Record 62861 DOI 10.17182/hepdata.21600

The reaction γ⊥,∥p→π+n has been studied with linearly polarized photons of energy 3.0 GeV at −t values between 0.15 and 1.2 (GeVc)2. The asymmetry A+=(dσ⊥−dσ∥)(dσ⊥+dσ∥) is found to be positive throughout this four-momentum-transfer range, implying the dominance of natural parity exchange in the t channel. Comparison of dσ⊥(γ⊥p→π+n) and dσ⊥p→π−p) from a previous experiment indicates strong interference between the isoscalar and isovector photon amplitudes for photons polarized perpendicular to the production plane.

3 data tables
Table 1

No description provided.

Table 2

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Table 3

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Photoproduction of Single Charged Pions from Deuterium and Hydrogen

Bar-Yam, Z. ; de Pagter, J. ; Hoenig, M.M. ; et al.
Phys.Rev.Lett. 19 (1967) 40-42, 1967.
Inspire Record 52325 DOI 10.17182/hepdata.21751

Differential cross sections for the photoproduction of single charged pions from deuterium and hydrogen have been measured at pion center-of-mass angles between 30° and 90° and at photon energies between 3.0 and 3.7 GeV. The ratio of π− to π+ cross sections from deuterium is found to be appreciably smaller than 1.

4 data tables
Table 1

No description provided.

Table 2

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Table 3

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