论文标题
NNLO+PS蒙特卡洛模拟光子对生产Minnlops
NNLO+PS Monte Carlo simulation of photon pair production with MiNNLOPS
论文作者
论文摘要
我们在Powheg Box res框架内提出了基于Minnlops形式主义的HADRON COLLIDER的直接光子对生产的NNLO QCD精确事件生成器。尽管存在光子需要使用隔离标准，但我们的发电机还是建立的，因此在事件生成的任何阶段都不需要技术削减。因此，我们的预测可用于模拟具有任意基准切割的运动学分布。此外，我们描述了Minlops形式主义的一些修改，以便设置重新归一化和分解量表与固定顺序计算更相似，从而降低了高阶项的数值影响，而不是标称精度。最后，我们显示了通过用毕曲霉（Pythia8）淋浴生成的事件获得的几种现象学分布，并将其与Atlas协作中的13个TEV数据进行了比较。
We present a NNLO QCD accurate event generator for direct photon pair production at hadron colliders, based on the MiNNLOPS formalism, within the POWHEG BOX RES framework. Despite the presence of the photons requires the use of isolation criteria, our generator is built such that no technical cuts are needed at any stage of the event generation. Therefore, our predictions can be used to simulate kinematic distributions with arbitrary fiducial cuts. Furthermore, we describe a few modifications of the MiNNLOPS formalism in order to allow for a setting of the renormalization and factorization scales more similar to that of a fixed-order computation, thus reducing the numerical impact of higher-order terms beyond the nominal accuracy. Finally, we show several phenomenological distributions of physical interest obtained by showering the generated events with Pythia8, and we compare them with the 13 TeV data from the ATLAS Collaboration.
