论文标题
将Minnlo $ _ {\ rm ps} $推进到Diboson流程：$zγ$生产在nnlo+ps
Advancing MiNNLO$_{\rm PS}$ to diboson processes: $Zγ$ production at NNLO+PS
论文作者
论文摘要
我们考虑$Zγ$在耐药碰撞中的产生，并首次计算近来键至领先顺序的准确预测，始终匹配Parton Showers（NNLO+PS）。通过计算完整的过程$ pp \ to \ ell^+\ ell^-γ$，包括自旋相关性，干扰和脱壳效应。我们将最近开发的Minnlo $ _ {\ rm PS} $方法扩展到LHC上的$ 2 \ 2 $硬散射过程，该过程为所有DIBOSON过程的NNLO+PS模拟铺平了道路。这是第一个$ 2 \ to2 $ nnlo+ps计算，不需要A-posteriori多差异重量。我们发现，NNLO校正和与Parton淋浴的匹配对于准确模拟$Zγ$过程至关重要。我们的预测与最近的Atlas数据非常吻合。
We consider $Z γ$ production in hadronic collisions and present the first computation of next-to-next-to-leading order accurate predictions consistently matched to parton showers (NNLO+PS). Spin correlations, interferences and off-shell effects are included by calculating the full process $pp\to\ell^+\ell^-γ$. We extend the recently developed MiNNLO$_{\rm PS}$ method to genuine $2\to 2$ hard scattering processes at the LHC, which paves the way for NNLO+PS simulations of all diboson processes. This is the first $2\to2$ NNLO+PS calculation that does not require an a-posteriori multi-differential reweighting. We find that both NNLO corrections and matching to parton showers are crucial for an accurate simulation of the $Z γ$ process. Our predictions are in very good agreement with recent ATLAS data.
