论文标题
oft-shell $ t \ bar {t} b \ bar {b} $在LHC上生产：QCD校正，理论不确定性和$ b $ -JET定义
Off-shell $t\bar{t}b\bar{b}$ production at the LHC: QCD corrections, theory uncertainties and $b$-jet definitions
论文作者
论文摘要
我们提出了针对外壳的最新预测$ t \ bar {t} b \ bar {b} $生产，di-lepton在LHC上腐烂，$ \ sqrt {s} = 13 $ tev。结果在QCD中的NLO中是准确的，包括所有共鸣和非谐振图，顶部夸克和$ W $玻色子的干扰和有限宽度效果。我们讨论了QCD校正的影响，并评估综合和差异水平上的规模和PDF依赖性的理论不确定性。此外，我们研究了NLO横截面的初始状态$ b $ quarks引起的贡献规模。
We present state-of-the-art predictions for off-shell $t\bar{t}b\bar{b}$ production with di-lepton decays at the LHC with $\sqrt{s}=13$ TeV. Results are accurate at NLO in QCD and include all resonant and non-resonant diagrams, interferences and finite-width effects for top quarks and $W$ bosons. We discuss the impact of QCD corrections and assess theoretical uncertainties from scale and PDF dependence at the integrated and differential level. Additionally we investigate the size of contributions induced by initial-state $b$ quarks to the NLO cross section.
