Phenomenology of forward hadrons in deep inelastic scattering: Fracture functions and its Q 2 evolution
Phenomenology of forward hadrons in deep inelastic scattering: Fracture functions and its Q 2 evolution
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DOI：
10.1103/physrevd.56.426
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发表时间：
1997-03
影响因子：
5
通讯作者：
D. Florian;R. Sassot
中科院分区：
文献类型：
--
作者：
D. Florian;R. Sassot
我们在半包含过程（包括断裂函数）的微扰 QCD 描述框架内分析了 DESY HERA 深非弹性散射中正向中子产生的最新数据。使用与现有数据相当一致的破碎过程非微扰部分的模型估计，我们分析了所得断裂函数的 ${Q}^{2}$ 依赖性，这是由非齐次演化方程驱动的。我们还提出了对目标碎片区域中π介子产生截面的测量，作为微扰 QCD 的新测试，在这种情况下，相对于通常的 Altarelli-Parisi 方程给出的演化，它还预测了不同的 ${Q}^{2}$ 演化。
We analyze recent data on the production of forward neutrons in deep inelastic scattering at DESY HERA in the framework of a perturbative QCD description for semi-inclusive processes, which includes fracture functions. Using a model estimate for the nonperturbative piece of the fragmentation process, in fairly good agreement with the available data, we analyze the ${Q}^{2}$ dependence of the resulting fracture functions, which is driven by nonhomogeneous evolution equations. We also propose a measurement of the pion production cross section in the target fragmentation region as a new test of perturbative QCD, which in this case predicts also a different ${Q}^{2}$ evolution with respect to the one given by the usual Altarelli-Parisi equations.