Double hadron leptoproduction in the nuclear medium - INSPIRE

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Double hadron leptoproduction in the nuclear medium

HERMES

Collaboration

Oct, 2005

5 pages

Published in:

Phys.Rev.Lett. 96 (2006) 162301

e-Print:

hep-ex/0510030 [hep-ex]

DOI:

10.1103/PhysRevLett.96.162301

Report number:

DESY-05-205

Experiments:

DESY-HERA-HERMES

View in:

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Abstract: (arXiv)

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.

13.60.-r
25.75.Gz
13.87.Fh
25.30.Rw
nuclear matter
hadron leptoproduction
deep inelastic scattering
electron nucleus: deep inelastic scattering
deuteron
nitrogen

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