Measurement of J/ ψ production in 280 GeV/ cμ+ iron interactions

• Published in: Physics letters. B 1980-01, Vol.89 (2), p.267-270
• Main Authors: Aubert, J.J., Bassompierre, G., Becks, K.H., Bertsch, Y., Besson, C., Best, C., Böhm, E., Botterill, D.R., Brasse, F.W., Broll, C., Carr, J., Charles, B., Clifft, R.W., Cobb, J.H., Coignet, G., Combley, F., Court, G.R., Crespo, J.M., Dalpiaz, P.F., Dalpiaz, P., Dau, W.D., Davies, J.K., Declais, Y., Dobinson, R.W., Dress, J., Drees, J., Edwards, A., Edwards, M., Favier, J., Ferrero, M.I., Field, J.H., Flauger, W., Gabathuler, E., Gamet, R., Gayler, J., Ghez, P., Gössling, C., Haas, J., Hahn, U., Hamacher, K., Hayman, P., Henckes, M., Jokisch, H., Kadyk, J., Korbel, V., Maire, M., Massonnet, L., Melissinos, A., Mohr, W., Montgomery, H.E., Moser, K., Mount, R.P., Norton, P.R., Osborne, A.M., Payre, P., Peroni, C., Pessard, H., Pietrzyk, U., Rith, K., Rousseau, M.D., Schlösser, E., Schneegans, M., Sloan, T., Stockhausen, W., Stier, H.E., Thénard, J.M., Thompson, J.C., Urban, L., Von Holtey, G., Wahlen, H., White, V.A., Williams, D., Williams, W.S.C., Wimpenny, S.J.
• Format: Article
• Language: English
• Subjects: High Energy Physics - Experiment; Physics
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/0370-2693(80)90027-1

Virtual photoproduction of J/ ψ mesons has been measured for 280 GeV muon iron interactions in an iron/scintillator calorimeter target. The J/ψ's were identified by their decay into muon pairs. 315 events were observed, about half of which were elastic. The t, Q 2 and v distributions of these elastic events are presented. The v dependence is measured between 40 and 180 Mev and compared with lower energy photoproduction results. The Q 2 dependence is compared with the predictions of the vector dominance model.