Experimental results on J/ ψ production by π±, K±, p and [formula omitted] incident on hydrogen at 39.5 GeV/c

J/ ψ production at 40 GeV/ c by π ±, K ±, p and p incident on hydrogen has been studied and results compared with those obtained on tungsten in the same experiment. On hydrogen, J/ψ cross-section ratios relative to π − have been measured to be (for x F > 0) σ(π −) : σ(π +) : σ( p) : σ( p) = 1 : (...

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Bibliographic Details
Published in:Physics letters. B 1981, Vol.98 (3), p.220-224
Main Authors: Corden, M.J., Dowell, J.D., Garvey, J., Homer, R.J., Jobes, M., Kenyon, I.R., McMahon, T., Owen, R.C., Sumorok, K.C.T.O., Vallance, R.J., Watkins, P.M., Wilson, J.A., Sonderegger, P., Chaurand, B., Romana, A., Salmeron, R.
Format: Article
Language:English
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Summary:J/ ψ production at 40 GeV/ c by π ±, K ±, p and p incident on hydrogen has been studied and results compared with those obtained on tungsten in the same experiment. On hydrogen, J/ψ cross-section ratios relative to π − have been measured to be (for x F > 0) σ(π −) : σ(π +) : σ( p) : σ( p) = 1 : (0.78 ± 0.09) : (0.83 ± 0.35) : (0.07 ± 0.04) . The suppression of the proton induced cross sections shows the importance of calence quark-antiquark fusiin J/ψ production at this energy (i.e. M J 2/ ψ / s=0.13).
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(81)90992-8