A-dependence of muon pair production in π-nucleus interactions at 280 GeV/c

We have measured the relative cross sections for muon pair production by 280 GeV/ c negative pions on three different targets: carbon, copper, and tungsten. The value of α obtained from the parametrization σ = constant × A α is 0.94 ± 0.02 ± 0.02, whereas the parametrization σ≈σ 0( Z A ) A α′ , wher...

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Published in:Physics letters. B 1981-01, Vol.104 (5), p.416-420
Main Authors: Falciano, S., Freudenreich, K., Juillot, P., Wallace-Hadrill, J.S., Anderson, L., Coc, A., Kluberg, L., Romana, A., Salmeron, R., Varela, J., Betev, B., Blaising, J.J., Degré, A., Gudewicz, P., Morand, R., Schubelin, P., DiBitonto, D., Gsponer, A., Guanziroli, M., Hofer, H., Le Coultre, P., Strolin, P., Suter, H., Tarnopolsky, G.J., Telegdi, V.L., Viertel, G.
Format: Article
Language:English
Subjects:
Instrumentation and Detectors
Physics
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Summary:We have measured the relative cross sections for muon pair production by 280 GeV/ c negative pions on three different targets: carbon, copper, and tungsten. The value of α obtained from the parametrization σ = constant × A α is 0.94 ± 0.02 ± 0.02, whereas the parametrization σ≈σ 0( Z A ) A α′ , where σ 0( Z A ) is given by the Drell-Yan model, leads to α′ = 0.97 ±0.02±0.02. This last result is in agreement with the quark additivity rule which is inherent in the Drell-Yan model, no dependence is observed on the transverse momentum of the muon pair.
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(81)90710-3