标题： BFKL 与 O(α_s^3) 纠正对大快速度二喷注产生的影响 显示英文标题

标题： BFKL versus O(α_s^3) Corrections to Large-rapidity Dijet Production

摘要： 我们通过将精确的${\cal O}(\alpha_s^3)$计算与 BFKL 近似进行比较，研究在 Tevatron 能量下大快速度间隔的二喷注产生，该近似在$\alpha_s$的所有阶次中重新求和了快速度间隔$y$的主要幂次。 我们分析精确的${\cal O}(\alpha_s^3)$计算对喷注锥角大小作为$y$函数的依赖性，并利用此截面定义一个“有效快速度”$\hat y$，以减少大-$y$近似对运动学引起的误差。 使用$\hat y$在 BFKL 重求和中，我们重新考察大横向动量下的喷注产生以及标记喷注的横向动量去关联。 我们发现的效果没有之前使用大-$y$近似所发现的那么显著，但仍然具有重要意义。 显示英文摘要

摘要： We examine dijet production at large rapidity intervals at Tevatron energies by comparing an exact ${\cal O}(\alpha_s^3)$ calculation with the BFKL approximation, which resums the leading powers of the rapidity interval $y$ to all orders in $\alpha_s$. We analyze the dependence of the exact ${\cal O}(\alpha_s^3)$ calculation on the jet cone-size as a function of $y$, and use this cross section to define an ``effective rapidity'' $\hat y$ which reduces the error that the large-$y$ approximation induces on the kinematics. Using $\hat y$ in the BFKL resummation, we reexamine jet production at large transverse momenta and the transverse momentum decorrelation of the tagging jets. We find less dramatic, but still significant, effects than found previously using the large-$y$ approximation.