Muo Production of J/psi and the Gluon Distribution of the Nucleon

Ashman, J.; Badelek, B.; Baum, G.; Beaufays, J.; Bee, C. P.; Benchouk, C.; Bird, I. G.; Brown, S. C.; Caputo, M. C.; H. W. K.,; Chima, J. S.; Ciborowski, J.; Clifft, R.; Coignet, G.; Combley, F.; Court, G.; Dagostini, G.; Drees, J.; Duren, M.; Dyce, N.; Edwards, A. W.; Edwards, M.; Ernst, T.; Ferrero, M. I.; Francis, D.; Gabathuler, E.; Gajewski, J.; Gamet, R.; Gibson, V.; Gillies, J.; Grafstrom, P.; Hamacher, K.; Vonharrach, D.; Hayman, P.; Holt, J. R.; Hughes, V. W.; Jacholkowska, A.; Jones, T.; Kabuss, E. M.; Korzen, B.; Kruner, U.; Kullander, S.; Landgraf, U.; Lanske, D.; Lettenstrom, F.; Lindqvist, T.; Matthews, M.; Mizuno, Y.; Monig, K.; Montanet, F.; Nassalski, J.; Niinikoski, T.; Norton, P. R.; Oakham, F. G.; Oppenheim, R. F.; Osborne, A. M.; Papavassiliou, V.; Pavel, N.; Peroni, Cristiana; Peschel, H.; Piegaia, R.; Pietrzyk, B.; Povh, B.; Renton, P.; Rieubland, J. M.; Rith, K.; Rondio, E.; Ropelewski, L.; Salmon, D.; Sandacz, A.; Schroder, T.; Schuler, K. P.; Schultze, K.; Shibata, T. A.; Sloan, T.; Staiano, A.; Stier, H. E.; Stock, J.; Taylor, G. N.; Thompson, J. C.; Walcher, T.; Toth, J.; Urban, L.; Urban, L.; Wallucks, W.; Wheeler, S.; W. S. C.,; Wimpenny, S. J.; Windmolders, R.; Womersley, J.; Ziemons, K.

Measurements are presented of the inclusive distributions of the J/psi meson produced by muons of energy 200 GeV from an ammonia target. The gluon distribution of the nucleon has been derived from the data in the range 0.04 < x < 0.36 using a technique based on the colour singlet model. An arbitrary normalisation factor is required to obtain a reasonable integral of the gluon distribution. Some comments are made on the use of J/psi production by virtual photons to extract the gluon distribution at HERA.