论文标题
纳入$ t \覆盖{
Anatomy of inclusive $t\overline{t}W$ production at hadron colliders
论文作者
论文摘要
在LHC搜索新的和稀有现象中，顶级相关的通道$ pp \ to t \ overline {t} w^\ pm +x $是多列普顿分析必须克服的具有挑战性的背景。通过持续测量相同和多勒普顿最终状态的增强速率的动机，我们重新检查了$ pp \中较高的乘数多样性的重要性在nlo和nnlo中，在QCD中，在含$ t \ overline {t} w^\ pm $生产中。使用固定阶计算，我们估计在$ \ Mathcal {O}（α_s^4α）$中的真实和虚拟校正在相位空间的定义明确的区域中的混合物可以说可以说，No的总$ t \ t} w^\ pm $至少可以提高至少$ 10 \％-14-14-14 \％\％\％\％\％\％。但是，通过使用非自然的NLO多射流匹配，我们估计这些相同的更正最多是$ 10 \％-12 \％$，同时表现出增强的喷气多重性，这些乘数略微受到数据的青睐。这似乎不一致表明需要完全NNLO结果。我们对$ t \叠加{t} z $进程的启示发表评论。
In LHC searches for new and rare phenomena the top-associated channel $pp \to t\overline{t}W^\pm +X$ is a challenging background that multilepton analyses must overcome. Motivated by sustained measurements of enhanced rates of same-sign and multi-lepton final states, we reexamine the importance of higher jet multiplicities in $pp \to t\overline{t}W^\pm +X$ that enter at $\mathcal{O}(α_s^3α)$ and $\mathcal{O}(α_s^4α)$, i.e., that contribute at NLO and NNLO in QCD in inclusive $t\overline{t}W^\pm$ production. Using fixed-order computations, we estimate that a mixture of real and virtual corrections at $\mathcal{O}(α_s^4α)$ in well-defined regions of phase space can arguably increase the total $t\overline{t}W^\pm$ rate at NLO by at least $10\%-14\%$. However, by using non-unitary NLO multi-jet matching, we estimate that these same corrections are at most $10\%-12\%$, and at the same time exhibit the enhanced jet multiplicities that are slightly favored by data. This seeming incongruity suggests a need for the full NNLO result. We comment on implications for the $t\overline{t}Z$ process.
