We present a measurement of the A dependence of k_Tφ, the out-of-plane component of the dijet transverse momentum, in dijet events produced with a real photon beam. We also present the same measurement for dijets produced from pion-nucleus collisions in our detector. Both data sets are taken at a mean {}s of 21 GeV in the pT range 3--7 GeV/c. A clear A dependence of comparable magnitude is seen in both processes. The energy dependence of the nuclear behavior is also extracted.
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Naples et al. (1994) studied this question.
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