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arXiv 0909.4223hep-ex
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深度非弹性ep散射中孤立光子产生的测量

Measurement of isolated photon production in deep inelastic ep scattering

ZEUS Collaboration

摘要:

HERA的ZEUS探测器测量了深度非弹性ep散射中孤立光子的产生,其积分亮度为320 pb ^-1。对于交换光子虚量Q^2,在10 &lt; Q^2 5 GeV的范围内,在隔离光子横向能量和赝快度范围4 &lt; E_T &lt; 15 GeV和-0.7 &lt; eta &lt; 0.9内进行了测量< 350 GeV and for invariant masses of the hadronic system W_X>。微分截面表示为包含孤立光子产生的Q^2,x,E_T和η的函数。主对数部分子簇射蒙特卡罗模拟和微扰QCD预测给出了合理的描述的数据在大部分的运动学范围。

英文摘要:

Isolated photon production in deep inelastic ep scattering has been measured with the ZEUS detector at HERA using an integrated luminosity of 320pb^-1. Measurements were made in the isolated-photon transverse-energy and pseudorapidity ranges 4 < E_T < 15 GeV and -0.7 < eta < 0.9 for exchanged photon virtualities, Q^2, in the range 10 < Q^2 < 350 GeV and for invariant masses of the hadronic system W_X> 5 GeV. Differential cross sections are presented for inclusive isolated photon production as functions of Q^2, x, E_T and eta. Leading-logarithm parton-shower Monte Carlo simulations and perturbative QCD predictions give a reasonable description of the data over most of the kinematic range.

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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