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arXiv 0709.0016hep-ph
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强子观测量的广义部分子分布

Generalized Parton Distributions from Hadronic Observables

S. Ahmad, H. Honkanen, S. Liuti, S. K. Taneja

摘要:

我们提出了一个物理动机的参数化的非极化广义部分子分布,H和E,在零和非零值的偏度变量,θ。在ε =0时,H和E是用核子弹性形状因子和深层非弹性结构函数的实验数据同时拟合的约束条件确定的。高阶矩的格点计算限制了参数化在ω> 0。我们的方法提供了一个模型独立的提取广义分布的数据,是替代双分布的数学分析的一步。

英文摘要:

We propose a physically motivated parametrization for the unpolarized generalized parton distributions, H and E, valid at both zero and non-zero values of the skewness variable, ζ. At ζ=0, H and E are determined using constraints from simultaneous fits of experimental data on both the nucleon elastic form factors and the deep inelastic structure functions. Lattice calculations of the higher moments constrain the parametrization at ζ> 0. Our method provides a step towards a model independent extraction of generalized distributions from the data that is alternative to the mathematical ansatz of double distributions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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