论文标题
通过nnlo+n $^{3} $ ll的$ ϕ^{*}_η$的$ ϕ^{*}_η$分布的准确预测
Accurate prediction of the $ϕ^{*}_η$ distribution for the forward Z boson production in pp collisions through NNLO+N$^{3}$LL
论文作者
论文摘要
本文介绍了一项现象学研究，该研究是质子 - proton碰撞中的角变量$ ϕ^{*}_η$的偏蛋白衰变通道中Z骨玻色子产生的差分横截面。预测$ ϕ^{*}_η$分布将针对前向伪行为区域$ 2.0 <η_{l} <4.5 $的衰减leptons of Mass Energies 8、13和14 TEV。 $ ϕ^{*}_η$分布的准确预测是通过最新计算来实现的，包括固定订购扰动QCD和大型对数校正。预测分布是通过在近代到领先的对数（nnll）或近代的nnll（n $^{3} $ ll）准确度中获得的，与近代的QCD计算相匹配，nnlo+nnlo+nnll和nnll nnll nnll+nnll， 分别。 The Z boson $ϕ^{*}_η$ variable is experimentally preferable as it has been measured more precisely than the Z boson transverse momentum though both variables probe the same physics, thereby an accurate description of the $ϕ^{*}_η$ variable is required by using theoretical predictions at both NNLO+NNLL and NNLO+N$^{3}$LL精度。将匹配的预测与LHCB实验在LHC的可用8 TEV和13个TEV测量进行了比较，并发现非常一致。还报告了NNLO+NNLL和NNLO+N $^{3} $ LL的14个TEV预测分布。在所有预测的结果中，nnlo+n $^{3} $ ll为$ ϕ^{*}_η$分布的可靠描述提供了更高的精度。
This paper presents a phenomenological study for the differential cross section of the forward Z boson production in leptonic decay channels as a function of the angular variable $ϕ^{*}_η$ in proton-proton collisions. The $ϕ^{*}_η$ distribution is predicted for the forward pseudorapidity region $2.0 < η_{l} < 4.5$ of the decay leptons at center-of-mass energies 8, 13, and 14 TeV. Accurate prediction of the $ϕ^{*}_η$ distribution is achieved by means of the state-of-the-art calculations including fixed-order perturbative QCD and large logarithmic corrections. The predicted distributions are obtained by employing the resummation either at next-to-next-to-leading logarithmic (NNLL) or next-to-NNLL (N$^{3}$LL) accuracy which is matched to the perturbative QCD calculation at next-to-next-to-leading order (NNLO) accuracy, that is at NNLO+NNLL and NNLO+N$^{3}$LL, respectively. The Z boson $ϕ^{*}_η$ variable is experimentally preferable as it has been measured more precisely than the Z boson transverse momentum though both variables probe the same physics, thereby an accurate description of the $ϕ^{*}_η$ variable is required by using theoretical predictions at both NNLO+NNLL and NNLO+N$^{3}$LL accuracies. The matched predictions are compared with the available 8 TeV and 13 TeV measurements by the LHCb experiment at the LHC and found to be in good agreement. The 14 TeV predicted distributions at both NNLO+NNLL and NNLO+N$^{3}$LL are also reported. In all the predicted results, the NNLO+N$^{3}$LL provides more improved accuracy for the reliable description of the $ϕ^{*}_η$ distribution throughout its entire phase space region.
