Chinese Physics C > 1992, Vol. 16 > Issue(S3): 281-289

The Influence of Nuclear Target on “Small” Mass Lepton Pair Production of High Energy Hadron-Nuclei Collision

1 Department of Physics. Shijiazhuang College of Education, Shijiazhuang, Hebei, China;
2 Department of Physics. Hebei Normal University, Shijiazhuang, Hebei, China;
3 Department of Physics, Beijing University, Beijing, China

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Based on Drell-Yan Mechanism modified by perturbative QCD and the contribution vector meson states,we analyze and explain the data of the WA-78 Group ( π ^-,P) + A → μμ+ X process at 2 m_μ≤ m _μμ≤ 1.5GeV and 0.1 ≤ x _F≤ 0.6, in which we use the rescaling model and the data of the NMC Group for the ratio of structure functions R _A( x, Q ²) in 1-A deep inelastic scattering process at 0.0035 < x< 0.65 and 0.5 < Q ²< 90 GeV ²/ c ². After a comparisdrwith the data of the CIP group for the same process but different x _Fand m _μμintervals, we explain why the influence of nuclear target displays a strong shadowing effect in the former case but a strong anti-shadovving effect in the latter. Using the rescaling model and other reasonable assumptions,we show that the above results are closely related to R _A( x, Q ²) and thus reveal the essential connection between the nuclear effects in 1-A deep inelastic scattering and in h-A pair production processes.

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Gao Yonghua, He Zhenmin, Huang Ruiwang and Peng Hong'an. The Influence of Nuclear Target on “Small” Mass Lepton Pair Production of High Energy Hadron-Nuclei Collision[J]. Chinese Physics C, 1992, 16(S3): 281-289.

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Received: 1991-08-05

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Supported by the National Natural Science Foundation of China.

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通讯作者:陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

The Influence of Nuclear Target on “Small” Mass Lepton Pair Production of High Energy Hadron-Nuclei Collision

1 Department of Physics. Shijiazhuang College of Education, Shijiazhuang, Hebei, China;

2 Department of Physics. Hebei Normal University, Shijiazhuang, Hebei, China;

3 Department of Physics, Beijing University, Beijing, China

Received Date:1991-08-05

Fund Project:Supported by the National Natural Science Foundation of China.

Abstract:Based on Drell-Yan Mechanism modified by perturbative QCD and the contribution vector meson states,we analyze and explain the data of the WA-78 Group (π^-,P) + A →μμ+ X process at 2m_μ≤m_μμ≤ 1.5GeV and 0.1 ≤x_F≤ 0.6, in which we use the rescaling model and the data of the NMC Group for the ratio of structure functionsR_A(x, Q²) in 1-A deep inelastic scattering process at 0.0035 <x< 0.65 and 0.5 <Q²< 90 GeV²/c². After a comparisdrwith the data of the CIP group for the same process but differentx_Fandm_μμintervals, we explain why the influence of nuclear target displays a strong shadowing effect in the former case but a strong anti-shadovving effect in the latter. Using the rescaling model and other reasonable assumptions,we show that the above results are closely related toR_A(x, Q²) and thus reveal the essential connection between the nuclear effects in 1-A deep inelastic scattering and in h-A pair production processes.

The Influence of Nuclear Target on “Small” Mass Lepton Pair Production of High Energy Hadron-Nuclei Collision

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