论文标题
使用晶格QCD的扭曲质量公式用于质子的Gluon PDF
Gluon PDF for the proton using the twisted mass formulation of lattice QCD
论文作者
论文摘要
我们介绍了质子的非偏振Gluon PDF的X依赖性结果。我们使用$ n_f = 2+1+1 $最大扭曲的质量费米子合奏，并改善了三叶草，而Iwasaki改进了Gluon动作。夸克群体进行了调整，因此斜质量为260 meV。我们使用$ 32^3 \ times64 $晶格尺寸，带有晶格间距$ a = 0.093 $ fm，空间范围为3 fm。我们采用伪分发方法，并获得将核子动量数据组合数据的轻锥时间分布（ITD）提高到1.67 GEV和威尔逊线长度，$ Z $，最高为0.56 FM。我们探讨了系统的效果，例如对$ z $的最大值的依赖性输入拟合以获取Gluon PDF。
We present results of the x-dependence of the unpolarized gluon PDF for the proton. We use an $N_f=2+1+1$ ensemble of maximally twisted mass fermions with clover improvement and the Iwasaki improved gluon action. The quark masses are tuned so that the pion mass is 260 MeV. We use a $32^3\times64$ lattice size with a lattice spacing $a=0.093$ fm giving a spatial extent of 3 fm. We employ the pseudo-distribution approach and obtain the light-cone Ioffe time distribution (ITD) combining data for nucleon momentum boosts up to 1.67 GeV and Wilson line lengths, $z$, up to 0.56 fm. We explore systematic effects such as the dependence on the maximum value of $z$ entering the fits to obtain the gluon PDF.
