The evolution of hadron spectra in the modified leading logarithm approximation
The evolution of hadron spectra in the modified leading logarithm approximation
复制标题
改进的先导对数近似中的强子能谱演化
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
W. Ochs
中科院分区：
文献类型：
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作者：
S. Albino;B. Kniehl;G. Kramer;W. Ochs
摘要：我们在修正的领先对数近似下，将$Lambda_{mathrm {QCD}}$和胶子碎裂函数D（x，Q）在初始尺度$Q_0 ggLambda_{mathrm {QCD}}$上拟合到带电轻强子动量谱数据上.在没有附加假设的情况下，我们得到了关于xi = ln（1/x）$直到高斯峰附近的数据的很好的描述，并且得到了与文献中的数值接近的λ_{mathrm {QCD}}$。特别是，我们发现，这一过程描述的峰值的位置，并在对比的限制频谱，也归一化。
Abstract.We perform fits of $Lambda_{mathrm {QCD}}$ and the gluon fragmentation function D(x,Q) at initial scale $Q_0 ggLambda_{mathrm {QCD}}$ to charged light hadron momentum spectra data by evolving in the modified leading logarithm approximation. Without additional assumptions, we achieve a good description of the available data for $xi = ln(1/x)$ up to and around the Gaussian peak, and values of $Lambda_{mathrm {QCD}}$ acceptably close to those in the literature. In particular, we find that this procedure describes the position of the peak, and, in contrast to the limiting spectrum, also the normalization.