论文标题
双子的双方分布
Double parton distributions of the pion
论文作者
论文摘要
我们介绍了手性夸克模型框架中乳头的价双part顿分布的计算。 The result obtained at the low-energy quark model scale is particularly simple, where in the chiral limit a factorized form follows, $D(x_1,x_2, \vec{q}) = δ(1-x_1-x_2) F(\vec{q})$ with $x_{1,2}$ standing for the longitudinal momentum fractions of the valence quark and antiquark, and $ \ vec {q} $表示相对横向动量。对于$ \ vec {q} = \ vec {0} $，结果满足gaunt-sterling和规则。在DDGLAP框架内进行了QCD向更高尺度的演变。我们认为，价值的比率$ \ langle x_1^n x_2^m \ rangle / \ langle x_1^n \ rangle \ langle x_2^m \ rangle $，这些$不依赖于ddglap进化，这特别依赖于ddglap evolution the ddglap corlytials of the Longitirals of the Longitials of the the the the the parts partons partons partons partons partons andons partons partons partons partons partons andons andons andons intons。可以在未来的晶格QCD模拟中探测此比率。
We present a calculation of valence double parton distributions of the pion in the framework of chiral quark models. The result obtained at the low-energy quark model scale is particularly simple, where in the chiral limit a factorized form follows, $D(x_1,x_2, \vec{q}) = δ(1-x_1-x_2) F(\vec{q})$ with $x_{1,2}$ standing for the longitudinal momentum fractions of the valence quark and antiquark, and $\vec{q}$ denotes the relative transverse momentum. For $\vec{q}=\vec{0}$ the result satisfies the Gaunt-Sterling sum rules. The QCD evolution to higher scales is carried out within the dDGLAP framework. We argue that the ratios of the valence Mellin moments $\langle x_1^n x_2^m \rangle / \langle x_1^n \rangle \langle x_2^m \rangle $, which do not depend on the dDGLAP evolution, provide particularly convenient measures of the longitudinal correlations between the partons. Such ratios could be probed in future lattice QCD simulations.
