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《中国物理C》(英文)编辑部
2024年10月30日

Non-constancy and the Effect of Nuclear Environment of K-Factors in p-N(A) Drell-Yan Process

  • Based on the next leading order (NLO) perturbative QCD calculation and adopted parton distribution functions from double Q2 rescaling model (DQ2RM) in nuclei, we have discussed the variation of K-factors in p N(A) Drell-Yan process. Our results show that K-factors could not be treated as constants as usual, but are varied markedly with the kinimatic variable xT(A). In the ISR and SppS energy regions, when 2×10-3≤ xT(A)<1, K-factors decrease markedly as xT(A) becomes smaller, but after xT(A)<2×10-3, Their values increase rapidly as xT(A) further decrease. K-factor has a little dependence on nucleon number A of a nuclei also, and their effects are more clear in small xT(A) region. These observations are important for stringent test of some models and some physical quanties with Drell-Yan (Drell-Yan like) process in super high energy regions.
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  • [1] . Altarelli G .Phys.Rep .,1982 ,81:12. Kabar-Andre J et al.Nucl.Phys.,1980 ,B175:251 3. Khalafi F Z .Phys.,1984 ,C18:57 4. Dress M et al.Z .Phys.,1992 ,C53:673 5. van Neerven W L Int.J.Mod .Phys.,1995,A10:2921;Hambergy R et al.Nucl.Phys.,1991,B359:343;van Neerven W L et al.Nucl.Phys.,1992 ,B382:116. Arneodo M et al.Proc .of Workshop on Future Physics at HEAR ed .by Ingelman G .1995,817 7. Arneodo M Phys.Rep .,1994 ,240:3108. ZHU Wei et al.Phys.Rev .,1991,D4 4 :2 762 9. Gluck M et al.Z .Phys .,1995,C6 7:4 33 10. HE ZhenMin et al.Eur.Phys.J.,1998,C4 :30 1;YAO XiaoXia et al.High Energy Phys.and Nucl.Phys.(in Chinese) ,1997, 21:548(姚晓霞等.高能物理与核物理,1997,21::548) 11. LI G L et al.Nucl.Phys.,1990,A509:757
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LIU ChunXiu, HE ZhenMin, DUAN ChunGui and PENG HongAn. Non-constancy and the Effect of Nuclear Environment of K-Factors in p-N(A) Drell-Yan Process[J]. Chinese Physics C, 2000, 24(2): 131-139.
LIU ChunXiu, HE ZhenMin, DUAN ChunGui and PENG HongAn. Non-constancy and the Effect of Nuclear Environment of K-Factors in p-N(A) Drell-Yan Process[J]. Chinese Physics C, 2000, 24(2): 131-139. shu
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Received: 1998-12-02
Revised: 1900-01-01
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Non-constancy and the Effect of Nuclear Environment of K-Factors in p-N(A) Drell-Yan Process

    Corresponding author: LIU ChunXiu,
  • Department of Physics, Shandong University, Ji’nan 250100, China2 Department of Physics, Hebei Teacher′s University, Shijiazhuang 050016, China3 Department of Physics, Peking University, Beijing 100871, China

Abstract: Based on the next leading order (NLO) perturbative QCD calculation and adopted parton distribution functions from double Q2 rescaling model (DQ2RM) in nuclei, we have discussed the variation of K-factors in p N(A) Drell-Yan process. Our results show that K-factors could not be treated as constants as usual, but are varied markedly with the kinimatic variable xT(A). In the ISR and SppS energy regions, when 2×10-3≤ xT(A)<1, K-factors decrease markedly as xT(A) becomes smaller, but after xT(A)<2×10-3, Their values increase rapidly as xT(A) further decrease. K-factor has a little dependence on nucleon number A of a nuclei also, and their effects are more clear in small xT(A) region. These observations are important for stringent test of some models and some physical quanties with Drell-Yan (Drell-Yan like) process in super high energy regions.

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