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arXiv · hep-ex/0510030

Double hadron leptoproduction in the nuclear medium

The HERMES Collaboration·A. Airapetian
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Abstract

First measurement of double-hadron production in deep-inelastic scattering has been measured with the HERMES spectrometer at HERA using a 27.6 GeV positron beam with deuterium, nitrogen, krypton and xenon targets. The influence of the nuclear medium on the ratio of double-hadron to single-hadron yields has been investigated. Nuclear effects are clearly observed but with substantially smaller magnitude and reduced $A$-dependence compared to previously measured single-hadron multiplicity ratios. The data are in fair agreement with models based on partonic or pre-hadronic energy loss, while they seem to rule out a pure absorptive treatment of the final state interactions. Thus, the double-hadron ratio provides an additional tool for studying modifications of hadronization in nuclear matter.

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The HERMES Collaboration, A. Airapetian. 2005-12-22. Double hadron leptoproduction in the nuclear medium. https://doi.org/10.1103/physrevlett.96.162301

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