An experimental study of large-angle elastic scattering of charged mesons and antiprotons on protons at 20 and 30 GeV/c incident momenta
| Autor: | M. Macri, A. Lundby, B.G. Duff, R. Mollerud, E. Johansson, V. Gracco, J. Tavernier, C. Baglin, K. Brobakken, L. Rossi, R. Lowndes, G.J. Lush, A. Santroni, S. Kooijman, J.D. Hansen, A. Buzzo, L. Causton, D.G. Davis, J. Haldorsen, D.C. Imrie, J. Myrheim, T. Buran, M. Yvert, F.F. Heyman, P. Helgaker, S.O. Sørensen, R.B. Böck, G. Skjevling, M. Coupland, S. Ferroni, B. Schistad, M. Poulet, I. Kenyon-Gjerpe, P.J. Carlson, L. Bugge, J.P. Guillaud, K. Kirsebom |
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| Rok vydání: | 1983 |
| Předmět: |
Physics
Elastic scattering Nuclear and High Energy Physics Particle physics Annihilation Meson 010308 nuclear & particles physics Scattering Hadron 01 natural sciences Nuclear physics Pion Pair production Antiproton 0103 physical sciences High Energy Physics::Experiment Nuclear Experiment 010306 general physics |
| Zdroj: | Nuclear Physics B. 216:1-39 |
| ISSN: | 0550-3213 |
| DOI: | 10.1016/0550-3213(83)90486-8 |
| Popis: | A description is given of an experiment to study elastic scattering of π±, K±and p on protons at c.m. scattering angles from 45° to 100° at incident laboratory momenta 20 GeV/c and 30 GeV/c. The corresponding t range is from −6.2 (GeV/c)2 to −28 (GeV/c)2. There are no previous observations for these reactions in this t range. High intensity and large geometrical acceptance were required in order to measure the low cross sections. The experiment used a double-arm spectrometer. MWPCs were used for reconstruction, and threshold and differential Cerenkov counters for identification. Scintillation counters, Cerenkov counters and a hadron calorimeter were used in the trigger. The trigger logic utilized specially designed matrices and a hard wired microprocessor. The π−p elastic scattering cross sections follow approximately the dimensional counting rule from 3.5 GeV/c.and up to 30 GeV/c. The cross sections decrease by seven orders of magnitude in this energy range. The data is compared to quark models. None of these models give a comprehensive description of the results. However, some modifications to these models improve their consistency with the data. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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