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

GAO Yong-Hua; HE Zhen-Min; HUANG Rui-Wang; PENG Hong-An

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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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_μμμ<1.5GeV and 0.1F<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,Q²) in 1-A deep inelastic scattering process at 0.00352<90MeV²/c².In our analysis,after comparison with the data of the CIP group for the same process but at different m_ll and x_F regions,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,Q²) and thus further revealing the essential connection for the influence.

References

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T. Sloan, G. Smada and R. Voss, Phys. Rep., 162(1988), 45.[2] 彭铁梁、李子帮、彭宏安，高能物理与核物理，10(1986)，438;R. M. Godbole and K.- Sarma, Phys; Rev，D25(1980)，120.[3] E. Amassontzis et al., Phys. Rev，D38(1986), 1377.P. Borpalo et al., Phys. Lett., 193B(1987), 368[4] W A-78,H .Cobbaertt et al ，Phys. Lett., 213B(1988), 395.[5] NMC, P. Amapdruz ei al.CERN-Exp/91-52.[6] R. J. M. Covalan .and E.Predazz, in "Problems of Fundamental Modern Physics'' World Scientific Singapure (1991), 83.[7] R. L. Jaffe, Phys. Lett., 134B(1984), 449.刘连寿、彭宏安、赵维勤，中国科学(英文版)A28,No. 10(1985),71.[8] J.Owens, Phys. Rev., D30(1984), 49.D.Duke and J. Owons, Phys. Rev., D30(1984), 49[9] A. P. Buras, Rev. Mod. Phys., 52(1980), 199[10] K. Y. Anderson et al，Phys. Rev, Lett., 42(1979), 944.

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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
Revised: 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_μμμ<1.5GeV and 0.1F<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,Q²) in 1-A deep inelastic scattering process at 0.00352<90MeV²/c².In our analysis,after comparison with the data of the CIP group for the same process but at different m_ll and x_F regions,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,Q²) and thus further revealing the essential connection for the influence.