Chinese Physics C > 1992, Vol. 16 > Issue(7): 623-632

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

Department of Physics Educational College of Shijiazhuang 0500312 Department of Physics,Hebei Normal University,Shijiazhuang 0500313 Department of Physics,Peking University,Beijing 100871

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Based on Drell-Yan Mechanism modified by pertubative QCD and taking account of the contribution of vector meson states,we analyzed and explained the data of the WA-78 group ni (π ^－,P)+A→μμ+X process at 2m _μ μμ<1.5GeV and 0.1 F<0.6 with the use of the rescaling model and the recent accurately measured 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 2<90MeV ²/c ².In our analysis,after comparison with the data of the CIP group for the same process but at different m _lland x _Fregions,we gave a good explanation for why the influence of nuclear target displays a strong shadowing effect in former case while a strong antishadowing effect in latter case.By the rescaling model and other reasonable assumptions,we showed it is intimately connected with the above mentioned the R _A(x,Q ²) and thus further revealing the essential connection for the influence.

References

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GAO Yong-Hua, HE Zhen-Min, HUANG Rui-Wang and PENG Hong-An. The Influence of Nuclear Target on “Small” Mass Lepton Pair Production of High Energy Hardon-Nuclei Collision[J]. Chinese Physics C, 1992, 16(7): 623-632.

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Received: 1900-01-01
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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 Hardon-Nuclei Collision

Corresponding author:GAO Yong-Hua,

Department of Physics Educational College of Shijiazhuang 0500312 Department of Physics,Hebei Normal University,Shijiazhuang 0500313 Department of Physics,Peking University,Beijing 100871

Received Date:1900-01-01

Accepted Date:1900-01-01

Available Online:1992-07-05

Abstract:Based on Drell-Yan Mechanism modified by pertubative QCD and taking account of the contribution of vector meson states,we analyzed and explained the data of the WA-78 group ni (π^－,P)+A→μμ+X process at 2m_μ μμ<1.5GeV and 0.1 F<0.6 with the use of the rescaling model and the recent accurately measured 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 2<90MeV ²/c ².In our analysis,after comparison with the data of the CIP group for the same process but at different m _lland x _Fregions,we gave a good explanation for why the influence of nuclear target displays a strong shadowing effect in former case while a strong antishadowing effect in latter case.By the rescaling model and other reasonable assumptions,we showed it is intimately connected with the above mentioned the R _A(x,Q ²) and thus further revealing the essential connection for the influence.

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

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