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arXiv 0904.0929hep-ex
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HERA上低Q^2和低x时的内含ep散射截面测量

Measurement of the Inclusive ep Scattering Cross Section at Low Q^2 and x at HERA

H1 Collaboration

摘要:

在低动量转移(0.2 GeV^2 < Q^2 < 12 GeV^2)和低比约肯x(5 × 10 ^-6 < x < 0.02)区域,测量了包含的ep散射截面。结果是基于两个数据集收集的专用运行由H1合作在HERA在27.6 GeV和920 GeV的正电子和质子的束能量,分别。与H1先前公布的数据相结合,导致截面测量精度只有百分之几。利用辐射ep事件的运动学重建方法将测量扩展到较低的Q^2和较大的x。的数据进行了比较与理论模型,适用于从光生到深非弹性散射的过渡区。

英文摘要:

A measurement of the inclusive ep scattering cross section is presented in the region of low momentum transfers, 0.2 GeV^2 < Q^2 < 12 GeV^2, and low Bjorken x, 5x10^-6 < x < 0.02. The result is based on two data sets collected in dedicated runs by the H1 Collaboration at HERA at beam energies of 27.6 GeV and 920 GeV for positrons and protons, respectively. A combination with data previously published by H1 leads to a cross section measurement of a few percent accuracy. A kinematic reconstruction method exploiting radiative ep events extends the measurement to lower Q^2 and larger x. The data are compared with theoretical models which apply to the transition region from photoproduction to deep inelastic scattering.

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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