论文标题
晶格QCD中Feynman-Hellmann方法的核子形式因素
Nucleon Form Factors from the Feynman-Hellmann Method in Lattice QCD
论文作者
论文摘要
核子电磁形式因子的晶格QCD计算在高和低动量转移区域都很感兴趣。对于高动量转移，尤其是有开放的问题需要更激烈的研究，例如质子的电饰面中的潜在零交叉。我们将使用lattice QCD中的Feynman-Hellmann方法从QCDSF/UKQCD/CSSM协作进行QCDSF/UKQCD/CSSM协作方面的最新进展。 Feynman-Hellmann方法允许对激发态进行更大的控制，而激发状态我们通过转移动量传递的高值来利用。在此程序中，我们提出了最高$ 6 \ textrm {gev}^{2} $的形式因素的结果，使用$ n_ {f} = 2+1 $ 1 $ them Fermions for 310-470 $ \ textrm {mev} $的三个不同的pion质量。通过使用破坏风味的膨胀，将结果推送到物理斜质质量。
Lattice QCD calculations of the nucleon electromagnetic form factors are of interest at both the high and low momentum transfer regions. For high momentum transfers especially there are open questions which require more intense study, such as the potential zero crossing in the proton's electric form factor. We will present recent progress from the QCDSF/UKQCD/CSSM collaboration on the calculation of these form factors using the Feynman-Hellmann method in lattice QCD. The Feynman-Hellmann method allows for greater control over excited states which we take advantage of by going to high values of the momentum transfer. In this proceeding we present results of the form factors up to $6 \textrm{GeV}^{2}$, using $N_{f}=2+1$ flavour fermions for three different pion masses in the range 310-470 $\textrm{MeV}$. The results are extrapolated to the physical pion mass through the use of a flavour breaking expansion.
