Associated production of a top quark with a photon via anomalous couplings
Associated production of a top quark with a photon via anomalous couplings
复制标题
DOI：
10.1103/physrevd.98.074017
复制
发表时间：
2018-08
影响因子：
5
通讯作者：
M. Forslund;N. Kidonakis
中科院分区：
文献类型：
--
作者：
M. Forslund;N. Kidonakis
我们讨论了通过反常 $t$-$q$-$\gamma$ 耦合产生顶夸克与光子的相关过程，并提出了 LHC 能量下 $gq \rightarrow t\gamma$ 过程的软胶子发射的高阶校正。我们以次前导对数精度执行软胶子恢复，并推导出近似次次前导阶 (aNNLO) 双微分横截面。我们在 aNNLO 计算了各种 LHC 能量的总 $t\gamma$ 产生截面以及顶夸克横向动量和速度分布，并表明软胶子校正在这些过程中很大并且占主导地位。
We discuss the associated production of a top quark with a photon via anomalous $t$-$q$-$\gamma$ couplings, and present higher-order corrections from soft-gluon emission for the processes $gq \rightarrow t\gamma$ at LHC energies. We perform soft-gluon resummation at next-to-leading-logarithm accuracy and derive approximate next-to-next-to-leading order (aNNLO) double-differential cross sections. We calculate at aNNLO the total $t\gamma$ production cross sections and the top-quark transverse-momentum and rapidity distributions for various LHC energies, and show that the soft-gluon corrections are large and dominant in these processes.