Parton energy loss limits and shadowing in Drell-Yan dimuon production

Vasiliev, M. A.; Beddo, M. E.; Brown, C. N.; Carey, T. A.; Chang, T. H.; Cooper, W. E.; Gagliardi, C. A.; Garvey, G. T.; Geesaman, D. F.; Hawker, E. A.; He, X. C.; Isenhower, L. D.; Kaplan, D. M.; Kaufman, S. B.; Koetke, D. D.; Lee, W. M.; Leitch, M. J.; McGaughey, P. L.; Moss, J. M.; Mueller, B. A.; Papavassiliou, V.; Peng, J. C.; Petitt, G.; Reimer, P. E.; Sadler, M. E.; Sondheim, W. E.; Stankus, P. W.; Towell, R. S.; Tribble, R. E.; Webb, J. C.; Willis, J. L.; Young, G. R.

Parton energy loss limits and shadowing in Drell-Yan dimuon production

Authors

Description

A precise measurement of the ratios of the Drell-Yan cross section per nucleon for an 800 GeV/c proton beam incident on Be, Fe and W targets is reported. The behavior of the Drell-Yan ratios at small target parton momentum fraction is well described by an existing fit to the shadowing observed in deep-inelastic scattering. The cross section ratios as a function of the incident parton momentum fraction set tight limits on the energy loss of quarks passing through a cold nucleus.