论文标题
完整的NLO QCD校正到脱机TTBB生产
Full NLO QCD corrections to off-shell ttbb production
论文作者
论文摘要
在本文中，我们报告了将NLO QCD更正计算为$ {\ rm p} {\ rm p} {\ rm p} \至μ^ - \barν_μ{\ rm e}^+n+rm e}^+ν_{\ rm e} {\ rm e} LHC上的B} $，它是$ {\ rm P} {\ rm P} \ to {\ rm t} \ bar {\ rm t} {\ rm t} {\ rm h} \ bigl（\ bigl（\ to {\ rm b} \ bar rm b b b）这是首次将$ 2 \ to8 $进程的全NLO计算与6个外部强烈互动的Partons公开。不使用近似值，并且考虑了所有外壳和干扰效应。将完整计算中的横截面和差分分布与使用顶部夸克的双杆近似获得的结果进行了比较。完整计算与使用双极近似的计算之间的差异通常低于5 \％，但在某些相空间的某些区域中可以达到10 \％。
In this article, we report on the computation of the NLO QCD corrections to ${\rm p}{\rm p} \to μ^-\barν_μ{\rm e}^+ν_{\rm e}\bar{\rm b}{\rm b}\bar{\rm b}{\rm b}$ at the LHC, which is an irreducible background to ${\rm p}{\rm p}\to{\rm t}\bar{\rm t}{\rm H}\bigl(\to{\rm b}\bar{\rm b}\bigr)$. This is the first time that a full NLO computation for a $2\to8$ process with 6 external strongly-interacting partons is made public. No approximations are used, and all off-shell and interference effects are taken into account. Cross sections and differential distributions from the full computation are compared to results obtained by using a double-pole approximation for the top quarks. The difference between the full calculation and the one using the double-pole approximation is in general below 5\% but can reach 10\% in some regions of phase space.
