论文标题
直接$ρ_l$ MESON生产质子 - 蛋白质和质子抗蛋白质碰撞
Direct $ρ_L$ meson production in proton-proton and proton-antiproton collisions
论文作者
论文摘要
我们已经调查了较高的扭曲（HT）Feynman图对质子 - 蛋白质和质子 - 抗抗原碰撞的大$ p_t $ comp $ p_t $ comt $ p_t $ p_t $ p_t $ p_t $ p_t $ p_t $ p_t $ p_t $ collisions的贡献，我们讨论了HT对横截面可能贡献的现象学结果。为了从领先扭曲（LT）背景中提取HT子流程，我们使用各种$ρ_l$ MESON分布振幅（DAS）。在数值计算中，讨论了HT对横向动量和速度的依赖性，并特别强调DAS。对我们的结果的分析表明，HT贡献的速度比LT贡献的速度更快，而P_T $增加。前面的结果表明，必须考虑HT贡献，尤其是在低$ P_T $的区域，而HT对横截面的贡献取决于Meson分布幅度的选择。
We have investigated the contribution of the Higher Twist (HT) Feynman diagrams to the large-$p_T$ inclusive $ρ_L$ meson production cross section in proton-proton and proton-antiproton collisions and we discuss the phenomenological consequences of possible HT contributions to cross sections. To extract HT subprocesses from Leading Twist (LT) background, we use various $ρ_L$ meson distribution amplitudes(DAs). In the numerical calculations, the dependencies of the HT contribution on the transverse momentum and the rapidity are discussed with special emphasis on DAs. Analysis of our results shows that HT contributions decrease more rapidly than LT contributions with increasing $p_T$. The preceding results demonstrate that HT contributions must be considered especially in the region of low $p_T$ and the HT contribution to the cross-section depends on the choice of the meson distribution amplitudes.
