HEPData Search

Showing 8 of 58 results

Single photoproduction of neutral pi mesons on hydrogen in the forward direction at 4 gev

Braunschweig, W. ; Erlewein, W. ; Frese, H. ; et al.

Nucl.Phys.B 51 (1973) 167-173, 1973.

Inspire Record 84301 DOI 10.17182/hepdata.32708

The differential cross section of the reaction γ p → π 0 p has been measured at the Deutsches Elektronen Synchrotron DESY, Hamburg, at a mean photon energy of 4.0 GeV in the four-momentum transfer range between t = −0.2 (GeV/ c ) 2 and t = −1,2 (GeV/ c ) 2 in steps of approximately 0.08 (GeV/ c ) 2 . The experiment was carried out in connection with the measurements of the photoproduction of π 0 mesons on deuterium, which were described in the preceding article. In the present paper the contributions arising from background reactions are discussed in more detail.

1 data table

Table 1

No description provided.

Neutral pion photoproduction from protons at forward angles in the energy region between 350 mev and 1175 mev

Hemmi, Y. ; Inagaki, Y. ; Inagaki, T. ; et al.

Phys.Lett.B 43 (1973) 79-84, 1973.

Inspire Record 84945 DOI 10.17182/hepdata.28128

The differential cross section for the reaction γp → π 0 p at forward angles has been measured in the energy region between 350 MeV and 1175 MeV. A phenomenological multiple analysis was carried out on the present data together with other data.

13 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

The recoil proton polarization in the reaction gamma p ---> pi0 p in the third resonance region

Prentice, M.N. ; Railton, R. ; Rutherglen, J.G. ; et al.

Nucl.Phys.B 41 (1972) 353-364, 1972.

Inspire Record 75162 DOI 10.17182/hepdata.32916

Measurements have been made of the polarization of the recoil proton in the process γ p → π o p for photon energies of 850 - 1250 MeV and centre-of-mass angles of 80° - 125°. The results, which are to a typical accuracy of ±0.09, show a marked disagreement with previous phenomenological analyses above 1000 MeV.

5 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

HIGH-ENERGY pi0 PHOTOPRODUCTION FROM HYDROGEN WITH UNPOLARIZED AND LINEARLY POLARIZED PHOTONS

Anderson, Robert L. ; Gustavson, D. ; Johnson, J.R. ; et al.

Phys.Rev.D 4 (1971) 1937, 1971.

Inspire Record 67154 DOI 10.17182/hepdata.25066

We have completed measurements of the differential cross section for γ+p→π0+p, and the asymmetry with polarized photons, for incident photon energies from 4 to 18 GeV and momentum transfers between t=−0.1 and −1.4 (GeV/c)2. The experiment was performed at the Stanford Linear Accelerator Center, using the SLAC 1.6-GeV/c spectrometer to analyze protons recoiling from a hydrogen target. For the cross-section measurements a normal collimated bremsstrahlung beam was used. For the asymmetry measurements the polarized photons were produced by coherent bremsstrahlung from a diamond crystal, and a coincidence was required between the recoil proton and one of the π0 decay photons in a shower counter.

7 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.