论文标题
在NNLO QCD的强子山液上产生的单光子产生，具有逼真的光子隔离
Single Photon Production at Hadron Colliders at NNLO QCD with Realistic Photon Isolation
论文作者
论文摘要
通过仅允许在候选光子方向围绕固定尺寸的圆锥体内的固定尺寸的圆锥体内仅允许有限量的HADRONIC能量来定义放射线围栏的分离光子。该隔离标准接受了QCD Partons和Parton到Photon片段化过程的共线光子辐射的贡献。我们将NNLO QCD校正计算为分离的光子和射流生产，包括这两个贡献。我们新得出的结果使我们能够重现实验测量中使用的隔离处方，并与LHC实验的数据进行了详细的比较。我们量化了不同光子隔离处方的影响，包括完全没有隔离，对光子加射流横截面的影响，并讨论了黑岩山子在HADRON COLLIDERS上的光子片段化函数的可能测量值。
Isolated photons at hadron colliders are defined by permitting only a limited amount of hadronic energy inside a fixed-size cone around the candidate photon direction. This isolation criterion admits contributions from collinear photon radiation off QCD partons and from parton-to-photon fragmentation processes. We compute the NNLO QCD corrections to isolated photon and photon-plus-jet production, including these two contributions. Our newly derived results allow us to reproduce the isolation prescription used in the experimental measurements, performing detailed comparisons with data from the LHC experiments. We quantify the impact of different photon isolation prescriptions, including no isolation at all, on photon-plus-jet cross sections and discuss possible measurements of the photon fragmentation functions at hadron colliders.
