中文摘要：

高能重离子碰撞热核环境中J/ψ产额的压低被认为是夸克胶子等离子体生成的重要信号。研究冷核物质中各种核效应对J/ψ形成过程的影响,是准确理解热核环境中核效应对J/ψ产额压低机制的重要途径。研究了质子-原子核碰撞J/ψ产生过程中初态部分子分布函数的核效应、入射质子的能量损失效应、以及末态粲夸克对能量损失效应对J/ψ粒子产额的压低作用,对质子-原子核碰撞J/ψ产生过程的微分截面比RFe/Be（xF）进行了领头阶的唯象分析,并与E866实验数据中代表J/ψ粒子在靶核外产生的实验数据进行比较,获取了粲夸克对的能量损失值（3.81±1.71）GeV/fm。研究结果表明,部分子分布函数的核效应对截面比RFe/Be（xF）的压低作用在xF〉0区域是随着xF的增大而增大的;末态粲夸克对的能量损失效应是影响J/ψ粒子产额压低的重要核效应;当xF较大时（0.65xF0.92）,初态入射质子的能量损失效应在对微分截面比RFe/Be（xF）的压低中起了主要作用。

英文摘要：

J/ψ suppression observed in hot nuclear matter from heavy-ion collisions is considered as a most reliable signature for the formation of Quark-Gluon Plasma. The study about the nuclear effects on J/ψ production in cold nuclear matter provides an important tool for clarifying the conventional nuclear suppression mechanism in heavy-ion collisions. J/ψ suppression in p-A collisions is studied by considering the nuclear effects on parton distribution, the energy loss of beam proton in initial state, and the finial state energy loss of cˉc pair.The leading-order computations for J/ψ production cross-section ratios RFe/Be（xF） are presented and compared with the selected E866 experimental data with the J/ψ production occurring outside the nucleus, the obtained energy loss of the color octet is（3.81 ± 1.71） Ge V/fm. It is found that the nuclear suppression from the nuclear effects on the parton distribution functions becomes larger as the increase of xFin the range xF 0,the J/ψsuppression on RFe/Be（xF） induced by the energy loss of color octet cˉc is an important nuclear effect, in the region 0.65 xF 0.92, the energy loss of beam proton in initial state is the dominant mechanism which causes a reduction of the J/ψ yield.