CAJ | 학술논문

核环境中夸克的能量损失可以通过高能核Drell-Yah过程的核依赖进行测量.利用文献中给出的夸克能量损失公式和从轻子-原子核深度非弹性散射实验数据得到的束缚核子中的部分子分布函数,计算了FNAL E772800GeV的质子打击不同原子核的Drell-Yan过程截面比,发现考虑能量损失的计算结果与FNAL E772实验数据符合甚好.建议在利用核Drell-Yan过程实验数据抽取束缚核子内部分子分布函数时应该考虑能量损失效应.
핵배경중과극적능량손실가이통과고능핵Drell-Yah과정적핵의뢰진행측량.이용문헌중급출적과극능량손실공식화종경자-원자핵심도비탄성산사실험수거득도적속박핵자중적부분자분포함수,계산료FNAL E772800GeV적질자타격불동원자핵적Drell-Yan과정절면비,발현고필능량손실적계산결과여FNAL E772실험수거부합심호.건의재이용핵Drell-Yan과정실험수거추취속박핵자내부분자분포함수시응해고필능량손실효응.
The energy loss of the quark in the nuclear matter can be well described by the nuclear dependence in the high energy nuclear Drell-Yan process. In terms of the parametrization of the quark energy loss given in the literature and the nuclear parton distribution extracted from the experimental data of the deep inelastic scattering between lepton and nucleus only, the cross section ratios of lepton pair production in the nuclear Drell-Yan process induced by a proton of 800GeV bombarding on various nuclear targets at E772-FNAL are analyzed. It is shown that our results with the energy loss effect are in good agreement with the E772-FNAL data. Therefore, in order to extract the parton distribution functions in nucleus from the experimental data of the Drell-Yan process reliably, the energy loss effect should be taken into account.