高能核-核碰撞Drell-Yan过程K因子常数性的研究

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在高能核-核碰撞Drell-Yan过程考虑湮没项和康普顿散射项的基础上,利用双重Q2重标度模型,分别计算了碳、钙、铁、锡与其自身的核-核碰撞.结果表明,对于不同的x1值,K因子随x2的变化很不相同;同时,K因子变化的幅度是随核素A不同而发生微弱变化的,在特定的x1,x2取值有限范围内它不能近似取为常数.计算结果与实验的对比是对所用模型及QCD理论适用性的一种检验.
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