A measurement of the difference between the single-nucleon cross sections for J/ψmuoproduction in iron and in H2, D2 targets

Journal article

The cross sections for J ψ production have been measured in interactions of 280 GeV μ+ on hydrogen and deuterium (H, D) and also in interactions of 250 GeV μ+ on iron. The single-nucleon cross sections in iron are found to be larger than those in H, D. The mean ratio of the iron to H, D photoproduction cross sections in the range 60 < v < 200 GeV is 1.45 ±0.12 (statistical) ±0.22 (systematic error). Within the framework of the photon-gluon fusion model, this indicates that the gluon density per nucleon is ∼45% larger in iron than in H, D in the range 0.026 < x < 0.085, on a mass scale Q2eff ∼M2 J ψ. © 1985.

Authors: Aubert, J; Bassompierre, G; Becks, K; Benchouk, C; Best, C

• Journal: Physics Letters B
• Volume: 152
• Issue: 5-6
• Pages: 433-438
• Publication date: 1985-03-14
• DOI: 10.1016/0370-2693(85)90523-4
• ISSN: 0370-2693
• Language: English