| Nuclear Shadowing Effect on the K Factor in Au—Au Collisions |
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| 作者姓名： | 侯召宇 郑乔 等 |
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| 作者单位： | [1]DepartmentofPhysics,ShijiazhuangNormalCollege,Shijiazhuang050801 [2]DepartmentofMathematicsandPhysics,ShijiazhuangRailwayCollege,Shijiazhuang050043 |
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| 摘 要： | We investigate the nuclear shadowing effect on the K factor in the Drell-Yan process by introducing a Shadowing factor into the corresponding quantum chromodynamical αs order corrections.K factors for Au-Au collisions are calculated at the centre-of-mass system energies √s=60,130 and 200 GeV while the nuclear shadowing factor is taken into account.The numerical results indicate that the nuclear shadowing factor obviously raises the K value in the small x region,and for the same nucleon the K valus becomes smaller as the energy increases.The nuclear shadowing effect could be one reason for creating the non-constancy of the K factor.
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| 关 键 词： | 原子核碰撞 Au－Au碰撞 原子核屏蔽 K因子 |
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