论文标题
在深弹性散射中，重量味道PDF演变和可变品味数量方案不确定性
Heavy-flavor PDF evolution and variable-flavor number scheme uncertainties in deep-inelastic scattering
论文作者
论文摘要
我们考虑了一个详细的帐户，该帐户构建了符合魅力和底部的重夸克（Quark Parton）分布功能，从$ n_f = 3 $固定味味数（FFN）方案中的光口味开始，并使用QCD中的重夸克的标准解耦关系。我们还考虑了两种质量的效果。此外，还研究了可变味量数（VFN）方案在深度无弹性散射（DIS）中的不同实现，特别关注以$ q^2/m_h^2 $重新召集大型对数，该比率是交换的高音 - 高音$ q^2 $ q^2 $ to to to to to to cop-boson $ q^2 $ to to to to to to to to c^2 $ q^2 $ q^$ q^2 $ to to to to to to to to to to litagre-q^2 $ quage-Bosson $ q^2 $ to to to to loge-quage $ q如果在现有数据的运动范围内发现了重新召集效果的一小幅影响，那么在FFN方案中可以很好地描述它们。最后，我们研究了与VFN方案相关的理论不确定性，该方案的主要$ q^2 $。
We consider a detailed account on the construction of the heavy-quark parton distribution functions for charm and bottom, starting from $n_f=3$ light flavors in the fixed-flavor number (FFN) scheme and by using the standard decoupling relations for heavy quarks in QCD. We also account for two-mass effects. Furthermore, different implementations of the variable-flavor-number (VFN) scheme in deep-inelastic scattering (DIS) are studied, with the particular focus on the resummation of large logarithms in $Q^2/m_h^2$, the ratio the virtuality of the exchanged gauge-boson $Q^2$ to the heavy-quark mass squared $m_h^2$. A little impact of resummation effects if found in the kinematic range of the existing data on the DIS charm-quark production so that they can be described very well within the FFN scheme. Finally, we study the theoretical uncertainties associated to the VFN scheme, which manifest predominantly at small $Q^2$.
