Geweniger, Chr.
GAMMA N --> PI- P
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Pion production with polarized photons and test of vector dominance model

Geweniger, Chr. ; Heide, P. ; Kötz, U. ; et al.
Phys.Lett.B 28 (1968) 155-156, 1968.
Inspire Record 1392676 DOI 10.17182/hepdata.29098

Cross section asymmetries for the sum of single π + and π - production with polarized photons of 3.4 GeV have been measured. The results disagree with calculations based on the vector dominance model using experimental data of vector meson production in π beams.

1 data table
Table 1

No description provided.


Pi- production with linearly polarized photons at 3.4 gev

Burfeindt, H. ; Buschhorn, G. ; Geweniger, C. ; et al.
Nucl.Phys.B 59 (1973) 87-92, 1973.
Inspire Record 83969 DOI 10.17182/hepdata.8010

The asymmetry of the reaction γ d π − p ( p S ) with linearly polarized photons has been measured at 3.4 GeV and momentum transfers √− t between 0.2 and 0.8 GeV/ c . As in π + production, the asymmetry is large and positive at small momentum transfers but drops rapidly with increasing √− t , crossing zero around √− t = 0.55 GeV/ c .

2 data tables
Table 1

Axis error includes +- 0.0/0.0 contribution (?////).

Table 2

No description provided.