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arXiv 0810.5112hep-ex
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HERA的纵向结构功能测量

Longitudinal Structure Function Measurements from HERA

Vladimir Chekelian

摘要:

本文介绍了在对撞机HERA上测量的纵向结构函数FL。它们来自于包含深非弹性中性流e + p散射截面测量的基础上收集的数据在2007年与H1和ZEUS探测器在正电子束能量为27.5 GeV和质子束能量为920,575和460 GeV。采用能量依赖的截面,FL(x,Q2)的范围内测量的负四动量转移平方从12到800 GeV 2和低Bjorken-x从0.00028到0.0353。测量的纵向结构函数进行了比较高阶QCD预测。

英文摘要:

Measurements of the longitudinal structure function FL at the ep collider HERA are presented. They are derived from inclusive deep inelastic neutral current e+p scattering cross section measurements based on data collected in 2007 with the H1 and ZEUS detectors at a positron beam energy of 27.5 GeV and proton beam energies of 920, 575 and 460 GeV. Employing the energy dependence of the cross sections, FL(x,Q2) is measured in the range of negative four-momentum transfer squared from 12 to 800 GeV2 and low Bjorken-x from 0.00028 to 0.0353. The measured longitudinal structure function is compared with higher order QCD predictions.

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