论文标题
使用晶状体QCD的核子横向夸克旋转密度的第一矩
First moments of the nucleon transverse quark spin densities using lattice QCD
论文作者
论文摘要
我们使用晶格QCD介绍了核子中横向夸克旋转密度的梅林矩的计算。使用三个$ n_f = 2+1+1 $ twisted质量质量仪表集合物中提取到连续限制的非极化和横向概括的形式因子中提取密度。在非极化核子中横向极化的夸克的第一瞬间显示出有趣的失真，可以追溯到横向横向构造的形态因子$ \ bar {b} _ {tn0}（t）$的急剧下降。等异常的异常磁矩被确定为$κ__t= 1.051（94）$，它确认了核子中的负和较大的Boer-Mulders功能，$ H_1^{\ perp} $。
We present a calculation of the Mellin moments of the transverse quark spin densities in the nucleon using lattice QCD. The densities are extracted from the unpolarized and transversity generalized form factors extrapolated to the continuum limit using three $N_f=2+1+1$ twisted mass fermion gauge ensembles simulated with physical quark masses and spanning three lattice spacings. The first moment of transversely polarized quarks in an unpolarized nucleon shows an interesting distortion, which can be traced back to the sharp falloff of the transversity generalized form factor $\bar{B}_{Tn0}(t)$. The isovector tensor anomalous magnetic moment is determined to be $κ_T=1.051(94)$, which confirms a negative and large Boer-Mulders function, $h_1^{\perp}$, in the nucleon.
