| Página principal > Observed differences in event structures of high-p/sub T/ pi /sup 0/ and single photon events produced in pp collisions in the CERN ISR |
| Article | |
| Title | Observed differences in event structures of high-p/sub T/ pi /sup 0/ and single photon events produced in pp collisions in the CERN ISR |
| Author(s) | Rahm, D C (Brookhaven) |
| Collaboration | Brookhaven-CERN-Copenhagen-Lund-Rutherford-Tel Aviv Collaboration |
| Publication | 1981 |
| In: | AIP Conf. Proc. 68 (1981) 140-3 |
| In: | 20th International Conference on High-energy Physics, Madison, WI, USA, 17 - 23 Jul 1980, pp.140-3 |
| DOI | 10.1063/1.32411 |
| Subject category | Particle Physics - Experiment |
| Accelerator/Facility, Experiment | CERN ISR |
| Abstract | The direct photon production in pp collisions for c.m. energies 31<or= square root s<or=63 GeV and transverse momenta of up to 9 GeV/c were measured at the ISR using a segmented lead/liquid argon calorimeter. The observed gamma / pi /sup 0/ ratio is found to be significantly larger than zero at 4 GeV/c in p/sub T/ increasing to 0.4 at 9 GeV/c. The average multiplicity on the trigger side for the single-photon events was found to be significantly lower than for pi /sup 0/ events. The correlations in Delta y and Delta phi between the trigger particle and an additional particle are found to differ mainly at small Delta y and Delta phi . (14 refs). |