Photon production in pp collisions at 23.1-GeV
1962Citations per year
Abstract: (Springer)
The energy spectra of photons produced in p-p collisions at 23.1 GeV proton kinetic energy have been measured at the laboratory angles of 1.75°, 3°, 6°, 10°, 16° and 27° by means of a lead glass total absorption Cerenkov counter. A strong, energy-dependent, anisotropy in the cm. system is found. The go laboratory energy spectra have been calculated from the experimental υ-ray spectra. Measurements of the photons produced at the three smallest angles in p-Be and p-Al collisions at 23.1 GeV indicate a production cross-section per nucleon smaller by a factor 1.4 and 1.9, respectively, compared to the free nucleon case. The photon yield as function of the incident proton energy has been studied at 6° laboratory angle in the p-Be collision. The comparison of our experimental values with a statistical model shows that the model predicts well the total photon production cross-section and the cm. energy spectrum averaged over the total solid angle. The angular distribution is more anysotropic than the limiting one predicted by a statistical model with angular momentum conservation.References(0)
Figures(0)
0 References