深度非弹性散射中的大快度间隔事件与雷吉子

Large Rapidity GaP Events and Reggeon in DIS

分析了HERA实验上ep电荷交换过程的最大赝快度分布的实验结果．利用雷吉唯象理论计算了在这个过程中R_ρ（位于ρ+轨迹的雷吉子）交换的贡献.并用π介了云模型计算了同一过程中π+交换的贡献．运用MonteCarlo方法模拟了来态粒子的最大赝快度分布．结果表明，单独考虑哪一种交换过程都不能很好地解释实验结果，而当同时计入两者的贡献时，理论预言与实验数据符合较好．

The experimental results on maximum pseudo-rapidity η max distribution in the charge exchange process e + p-e + n + X is discussed in thes paper. The contributions of reggeon from regge phenomenology and rs + -exchange from pion cloud medel is calculated. The results show that neither the R_ρ-exchange nor the pion cloud model alone can explain the experimental data well, but after considering both these two processes together, by using Month Carlo simulahon, a good agreement betWeen theoretical results and experimental data is found.