Parton energy loss limits and shadowing in Drell-Yan dimuon production
M.A. Vasiliev, M.E. Beddo, C.N. Brown, T.A. Carey, T.H. Chang, W.E., Cooper, C.A. Gagliardi, G.T. Garvey, D.F. Geesaman, E.A. Hawker, X.C. He,, L.D. Isenhower, D.M. Kaplan, S.B. Kaufman, D.D. Koetke, W.M. Lee, M.J., Leitch, P.L. McGaughey, J.M. Moss, B.A. Mueller
TL;DR
This paper reports precise measurements of Drell-Yan cross section ratios for different targets, demonstrating shadowing effects and setting limits on quark energy loss in cold nuclear matter.
Contribution
It provides new experimental constraints on quark energy loss and shadowing effects in cold nuclei using high-energy proton-induced Drell-Yan measurements.
Findings
Shadowing in deep-inelastic scattering explains Drell-Yan ratio behavior
Tight limits on quark energy loss in cold nuclei
Cross section ratios consistent with existing shadowing models
Abstract
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.
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