Measurements of Rd-Rp and RCa-Rc in deep inelastic muon scattering

P. Amaudruz, M. Arneodo, A. Arvinson, B. Badelek, G. Baum, J. Beaufays, I. G. Bird, M. Botie, C. Broggini, W. Brückner, A. Brüll, W. J. Burger, J. Ciborowski, R. van Dantzig, H. Döbbeling, J. Domingo, J. Drinkard, H. Engelien, M. I. Ferrero, L. FluriP. Grafström, T. Granier, D. von Harrach, M. van der Heijden, C. Heusch, Q. Ingram, K. Janson-Prytz, M. de Jong, E. M. Kabuß, R. Kaiser, T. J. Ketel, F. Klein, B. Korzen, U. Kruner, S. Kullander, U. Landgraf, F. Lettenström, T. Lindqvist, G. K. Mallot, C. Mariotti, G. van Middelkoop, A. Milsztajn, Y. Mizuno, J. Nassalski, D. Nowotny, N. Pavel, C. Peroni, H. Peschel, B. Povh, R. Rieger, K. Rith, K. Röhrich, E. Rondio, L. Ropelewski, A. Sandacz, C. Scholz, R. Schumacher, U. Sennhauser, F. Sever, T. A. Shibata, M. Siebler, A. Simon, A. Staiano, G. Taylor, M. Treichel, M. Virchaux, J. L. Vuilleumier, T. Walcher, R. Windmolders, F. Zetsche

Research output: Contribution to journalArticlepeer-review

Abstract

Results are presented on the difference in R, the ratio of longitudinally to transversely polarised virtual photon absorption cross sections, for the deuteron and the proton. They are obtained by comparing the ratio of cross sections for the deep inelastic scattering of muons from deuterium and hydrogen targets at 90 and 280 GeV incident energy. The results cover the range x=0.01-0.30, at an average Q2 of 9 GeV2. The measured difference Rd-Rp shows no significant x dependence and is compatible with zero, as well as with expectations from perturbative QCD. We use the same method to obtain the difference RCa-RC from cross section ratios measured on carbon and calcium targets at 90 and 200 GeV incident energy.

Original languageEnglish
Pages (from-to)120-126
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume294
Issue number1
DOIs
Publication statusPublished - 5 Nov 1992
Externally publishedYes

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