| Autor: |
H. Nägele, H. Klein, Th. Ullrich, V. Steiner, U. Faschingbauer, I. Tserruya, Ch. Schwick, P. Holl, T. Gunzel, R. Baur, Reinhard Männer, Amos Breskin, D. Irmscher, I. Ravinovich, C. Jacob, Antonio Francesco Longoni, N. Wermes, Peter Glassel, Ch. Fuchs, H.W. Kraner, B. Schmitt, Rachel Chechik, J. Gläß, L. H. Olsen, E. Gatti, S. Tapprogge, C.P. de los Heros, J.P. Wurm, A. Wärner, Jurgen Schukraft, H. J. Specht, A. Pfeiffer, P. Rehak, K.H. Noffz, Marco Sampietro, A. Schön, A. Drees, A. Shor, Z. Fraenkel, Peter Fischer, G. Tel-Zur, F. Heß |
| Jazyk: |
angličtina |
| Rok vydání: |
1993 |
| Předmět: |
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| Popis: |
The CERES experiment (CErenkov Ring Electron Spectrometer) studies the production of low mass e + e − pairs in proton-proton, proton-nucleus and nucleus-nucleus interactions at the CERN SPS. The CERES spectrometer, has a novel design based on two Ring Imaging Cherenkov (RICH) counters, and it operates close to its design specifications. Data were recorded with 200 GeV u sulfur beam and 450 GeV proton beam. The analysis is in progress. We have extracted first e + − -pairs samples for p+Be, p+Au and S+Au collisions. In addition other physics topics were addressed. Inclusive photon spectra were measured in S+Au interactions. No excess over known hadronic sources was found within our present systematic error of 11%. Results on high p i charged pion spectra are presented up to 4 GeV c . We also studied the production of e + e − -pairs m the strong electromagnetic fields of very peripheral S+Pt collisions. The data are well described by a first-order perturbative QED-calculation. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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