A Study on K-Factor′s Constant for Drell-Yan Process in High Energy Nucleus-Nucleus Collision

HOU Zhao-Yu; ZHENG Qiao; ZHANG Ben-Ai

Chinese Physics C> 2002, Vol. 26> Issue(4) : 364-370

A Study on K-Factor′s Constant for Drell-Yan Process in High Energy Nucleus-Nucleus Collision

Department of Physics, Shijiazhuang Normal College, Shijiazhuang 050801, China2 Graduate School, Chinese Academy of Engineering Physics, Beijing 100088, China3 Department of Mathematics and Physics, Shijiazhuang Railway College, Shijiazhuang 050043, China

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Abstract：
The double Q²-rescaling model is used to calculate the variation of K-factor with x₂ when the nucleus A-nucleus A collision (for example, C, Ca, Fe, Sn) occurs at different values of x₁, where x₁ and x₂ are momentum fraction variables. In this calculation, the contributions of annihilations and Compton scattering have been taken into account in the Drell-Yan process. The numerical results show that the plots of K-factor versus x₂ are somewhat dependent on the values of x₁ and that K-factor could not be regarded as a constant because it changes with A-nucleus to some extent. These results can be used to test the validity of the nucleus model and the adaptability of QCD theory.

References

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HOU Zhao-Yu, ZHENG Qiao and ZHANG Ben-Ai. A Study on K-Factor′s Constant for Drell-Yan Process in High Energy Nucleus-Nucleus Collision[J]. Chinese Physics C, 2002, 26(4): 364-370.

HOU Zhao-Yu, ZHENG Qiao and ZHANG Ben-Ai. A Study on K-Factor′s Constant for Drell-Yan Process in High Energy Nucleus-Nucleus Collision[J]. Chinese Physics C, 2002, 26(4): 364-370. shu

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Received: 2001-06-12
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

A Study on K-Factor′s Constant for Drell-Yan Process in High Energy Nucleus-Nucleus Collision

Corresponding author: HOU Zhao-Yu,

Department of Physics, Shijiazhuang Normal College, Shijiazhuang 050801, China2 Graduate School, Chinese Academy of Engineering Physics, Beijing 100088, China3 Department of Mathematics and Physics, Shijiazhuang Railway College, Shijiazhuang 050043, China

Received Date: 2001-06-12
Accepted Date: 1900-01-01
Available Online: 2002-04-05

Abstract: The double Q²-rescaling model is used to calculate the variation of K-factor with x₂ when the nucleus A-nucleus A collision (for example, C, Ca, Fe, Sn) occurs at different values of x₁, where x₁ and x₂ are momentum fraction variables. In this calculation, the contributions of annihilations and Compton scattering have been taken into account in the Drell-Yan process. The numerical results show that the plots of K-factor versus x₂ are somewhat dependent on the values of x₁ and that K-factor could not be regarded as a constant because it changes with A-nucleus to some extent. These results can be used to test the validity of the nucleus model and the adaptability of QCD theory.