在p+p碰撞中，只有两个带头粒子，一个处在弹碎裂区，另一个处在靶碎裂区。研究表明：如同核-核碰撞一样，修正的Landau流体力学模型本身不足以对p+p碰撞中带电粒子赝快度分布的实验测量给出很好的描述，只有在考虑了带头粒子效应后，理论才能很好地与实验结果相一致。在√s=23.6～900 GeV的整个能量范围内，理论与现有实验数据符合得很好。
In a p+p collision, there are only two leading particles. One is in pro jectile fragmentation region, the other is in target fragmentation region. The investigation of present paper shows that, just like in nucleus-nucleus collisions, the revised Landau hydrodynamic model alone is not enough to have a good description to the measured pseudorapidity distributions of charged particles in p+p collisions. Only after the leading particles are taken into account as well, can the experimental data be matched up properly. The theoretical model works well in p+p collisions in the whole available energy region from√s=23.6 to 900 GeV.
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