论文标题
NNLO+N3LL处的Zγ横向摩托频谱
The Zγ transverse-momentum spectrum at NNLO+N3LL
论文作者
论文摘要
我们考虑hadronic碰撞中产生的$zγ$对的横向摩托车（$ p_t $）。小$ p_t $以对数增强的贡献重新定于QCD扰动理论中的所有订单，并与固定订单预测相结合。我们通过将近代到接头的对数（n $^3 $ ll）匹配到近代到隔壁到领先的订单（NNLO），通过将近代到接头的对数（n $^3 $ ll）匹配，实现了$zγ$ $ $ $ p_t $ spectrum的最先进预测。通过考虑$ \ ell^+\ ell^-γ$在完全差异水平上的产生，包括自旋相关性，干扰和外壳效应，可以将任意切割应用于Leptons和Photon。我们在有基质削减的情况下在LHC上介绍了结果，并与$ 13 $ \ $ \ tev Atlas数据的数据达成协议。
We consider the transverse-momentum ($p_T$) distribution of $Zγ$ pairs produced in hadronic collisions. Logarithmically enhanced contributions at small $p_T$ are resummed to all orders in QCD perturbation theory and combined with the fixed-order prediction. We achieve the most advanced prediction for the $Zγ$ $p_T$ spectrum by matching next-to-next-to-next-to-leading logarithmic (N$^3$LL) resummation to the integrated cross section at next-to-next-to-leading order (NNLO). By considering $\ell^+\ell^-γ$ production at the fully differential level, including spin correlations, interferences and off-shell effects, arbitrary cuts can be applied to the leptons and the photon. We present results at the LHC in presence of fiducial cuts and find agreement with the $13$\,TeV ATLAS data at the few-percent level.
