| THE PHYSICS OF ELEMENTARY PARTICLES AND FIELDS |
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Calculation of Nuclear Deeply Virtual Compton Scattering in HERMES Experiment |
| YE Hong-Xue, MAO Ya-Jun, WANG Si-Guang, SUN Bo |
| School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 |
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YE Hong-Xue, MAO Ya-Jun, WANG Si-Guang et al 2009 Chin. Phys. Lett. 26 011301 |
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Abstract We investigate the possibility to acquire information of nuclear generalized parton distribution (GPD) H by studying the deeply virtual Compton scattering (DVCS) off several nuclear targets at the HERMES group (Hadron-Electron Ring Accelerator Measurement of Spin). Two different models are used and developed to demonstrate the leading asymmetry amplitude ALUsinΦ for coherent-enriched and incoherent-enriched parts with both statistical and systematic uncertainties estimated. It is found that a clear enhancement of ratio of nuclear asymmetry ALUA,sinΦ to free proton asymmetry ALUH,sinΦ in the coherent-enriched region is expected by both models, and a decrease of the ratio in incoherent-enriched region; both give the information about nuclear modifications. It is also possible to distinguish between those two models even under the limited statistics.
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| Keywords:
13.60.Hb
25.30.Rw
34.80.Nz
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Received: 15 July 2008
Published: 24 December 2008
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| PACS: |
13.60.Hb
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(Total and inclusive cross sections (including deep-inelastic processes))
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25.30.Rw
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(Electroproduction reactions)
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34.80.Nz
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(Spin dependence of cross sections; polarized beam experiments)
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