Coherence Time in High Energy Proton-Nucleus Collisions

Details Coherence Time in High Energy Proton-Nucleus Collisions Coherence Time in High Energy Proton-Nucleus Collisions

1998-08-18

arxiv.org/abs/hep-ph/9808352v1

Phys.Rev.Lett. 82 (1999) 1636-1639

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages in LaTeX. Includes 6 eps figures. Uses epsf.sty

Scientific paper

10.1103/PhysRevLett.82.1636

Precisely measured Drell-Yan cross sections for 800 GeV protons incident on a variety of nuclear targets exhibit a deviation from linear scaling in the atomic number A. We show that this deviation can be accounted for by energy degradation of the proton as it passes through the nucleus if account is taken of the time delay of particle production due to quantum coherence. We infer an average proper coherence time of 0.4 +- 0.1 fm/c, corresponding to a coherence path length of 8 +- 2 fm in the rest frame of the nucleus.

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