On the observability of direct photons in ultrarelativistic nucleus-nucleus collisions by means of inclusive photon and hadron spectra
✍ Scribed by N.J.A.M. van Eijndhoven
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 284 KB
- Volume
- 618
- Category
- Article
- ISSN
- 0375-9474
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✦ Synopsis
A method is presented to search for a direct photon signal in collisions between nuclei at ultrarelativistic energies. In the proposed method the analysis is performed in the center of momentum system of the radiating system, being the cms of the colliding nucleons in case of collisions of symmetric systems. This results in a maximal strength of a possible direct photon signal in the observed energy spectra, since the smearing of the signal due to the Lorentz transformation between the cms and the laboratory frame in case of fixed target experiments is absent. The feasibility of detecting a direct photon signal is examined by comparison of calculated photon and hadron spectra for central and peripheral 32S on S collisions at a nucleon-nucleon cms energy of about 20 GeV, being the energy domain of the CERN-SPS fixed target experiments. @ 1997 Elsevier Science B.V.