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arXiv 1106.5944hep-ex
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HERA深度非弹性散射中正向光子产生的测量

Measurement of Photon Production in the Very Forward Direction in Deep-Inelastic Scattering at HERA

H1 Collaboration

摘要:

本文研究了HERA中正电子-质子深度非弹性散射中与质子束方向成很小角度的光子的产生。这些数据是用H1探测器在2006年和2007年拍摄的,对应于$126 \mathrm{pb}^{-1}$的积分亮度。分析了正电子顶点的负四动量转移平方$6<Q^2<100$、GeV、$^2$和非弹性$0.05<y<0.6$的范围。横截面测量的最具活力的光子与赝快度$η>7.9$作为其横向动量$p_T^{lead}$和纵向动量分数的入射质子$x_L^{lead}$的函数。此外,研究了截面作为赝快度范围$η>7.9$内所有光子的纵向动量分数$x_L^{sum}$之和的函数。的横截面归一化的包容性深非弹性散射横截面和深非弹性散射模型的预测和高能宇宙射线的强子相互作用的模型进行比较。

英文摘要:

The production of photons at very small angles with respect to the proton beam direction is studied in deep-inelastic positron-proton scattering at HERA. The data are taken with the H1 detector in the years 2006 and 2007 and correspond to an integrated luminosity of $126 \mathrm{pb}^{-1}$. The analysis covers the range of negative four momentum transfer squared at the positron vertex $6<Q^2<100$ GeV$^2$ and inelasticity $0.05<y<0.6$. Cross sections are measured for the most energetic photon with pseudorapidity $η>7.9$ as a function of its transverse momentum $p_T^{lead}$ and longitudinal momentum fraction of the incoming proton $x_L^{lead}$. In addition, the cross sections are studied as a function of the sum of the longitudinal momentum fraction $x_L^{sum}$ of all photons in the pseudorapidity range $η>7.9$. The cross sections are normalised to the inclusive deep-inelastic scattering cross section and compared to the predictions of models of deep-inelastic scattering and models of the hadronic interactions of high energy cosmic rays.

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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