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arXiv 0810.3096hep-ex
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在HERA上测量大动量转移光子的衍射散射

Measurement of Diffractive Scattering of Photons with Large Momentum Transfer at HERA

H1 Collaboration

摘要:

利用HERA的H1探测器首次测量了具有大动量转移γ p -> γ Y的准实光子的衍射散射,其中Y是质子解离系统。测量是在初始光子虚量Q^2 < 0.01 GeV^2时进行的。在175 < W < 247 GeV和4< |t| <36 GeV ^2的范围内,横截面被测量为W(入射光子-质子质能中心)和t(质子顶点转移的四个动量的平方)的函数。的W依赖性很好地描述了一个模型的基础上微扰QCD使用领先的对数近似的BFKL演化。测得的|t|依赖性比模型预测的和在排斥矢量介子产生中观察到的更难。

英文摘要:

The first measurement of diffractive scattering of quasi-real photons with large momentum transfer gamma p -> gamma Y, where Y is the proton dissociative system, is made using the H1 detector at HERA. The measurement is performed for initial photon virtualities Q^2 < 0.01 GeV^2. Cross sections are measured as a function of W, the incident photon-proton entre of mass energy, and t, the square of the four-momentum transferred at the proton vertex, in the range 175 < W < 247 GeV and 4<|t|<36 GeV^2. The W dependence is well described by a model based on perturbative QCD using a leading logarithmic approximation of the BFKL evolution. The measured |t| dependence is harder than that predicted by the model and those observed in exclusive vector meson production.

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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