Measurements of Nonsinglet Moments of the Nucleon Structure Functions and Comparison to Predictions from Lattice QCD for Q2=4 GeV2
Measurements of Nonsinglet Moments of the Nucleon Structure Functions and Comparison to Predictions from Lattice QCD for Q2=4 GeV2
复制标题
核子结构函数非单矩的测量以及与 Q2=4–GeV2 晶格 QCD 预测的比较
DOI：
10.1103/physrevlett.123.022501
复制
发表时间：
2019
影响因子：
8.6
通讯作者：
Brash, E.
中科院分区：
文献类型：
--
作者：
Albayrak, I.;Mamyan, V.;Christy, M. E.;Ahmidouch, A.;Arrington, J.;Asaturyan, A.;Bodek, A.;Bosted, P.;Bradford, R.;Brash, E.
我们提出了利用新的精度数据的deuteronstructure函数在大Bjorken通过Rosenbluth分离技术在杰斐逊实验室实验大厅C确定的核子非单重态矩的提取。这些新的数据相结合的补充数据集的质子先前测量在C厅在类似的运动学和世界数据集的质子和氘在较低的测量在SLAC和欧洲核子研究中心。新的杰斐逊实验室数据提供了覆盖范围的上三分之一，对精确确定更高的时刻至关重要。与以前的提取，这些时刻已被纠正的核效应，在氘核中使用一个新的全球适合的氘核和质子数据。所获得的实验矩代表了一个数量级的精度提高比以前的提取使用highdata。此外，最近在晶格QCD计算令人兴奋的发展提供了有史以来第一次比较这些新的实验结果与计算的时刻进行的物理π质量，以及一个新的方法，首先计算夸克分布直接决定时刻之前。
We present extractions of the nucleon nonsinglet moments utilizing new precision data on the deuteronstructure function at large Bjorken-determined via the Rosenbluth separation technique at Jefferson Lab Experimental Hall C. These new data are combined with a complementary set of data on the proton previously measured in Hall C at similar kinematics and world datasets on the proton and deuteron at lowermeasured at SLAC and CERN. The new Jefferson Lab data provide coverage of the upper third of therange, crucial for precision determination of the higher moments. In contrast to previous extractions, these moments have been corrected for nuclear effects in the deuteron using a new global fit to the deuteron and proton data. The obtained experimental moments represent an order of magnitude improvement in precision over previous extractions using highdata. Moreover, recent exciting developments in lattice QCD calculations provide a first ever comparison of these new experimental results with calculations of moments carried out at the physical pion mass, as well as a new approach that first calculates the quark distributions directly before determining moments.