arXiv 1003.29232010-03-15hep-ex

PDKEEPAAAPDKEEPAAAB中HERA处的包含射流截面以及kT、anti-kT和SIScone射流算法的比较

Inclusive-jet cross sections in NC DIS at HERA and a comparison of the kT, anti-kT and SIScone jet algorithms

The ZEUS Collaboration, H. Abramowicz

备注：: 27 pages, 6 figures, 4 tables
DOI：: 10.1016/j.physletb.2010.06.015

摘要：

首次采用anti-kT和SIScone算法测量了中性流深度非弹性ep散射中的微分包含射流截面。在HERA的ZEUS探测器上，我们使用82 pb^-1的积分亮度测量了玻色子虚质量Q^2 > 125 GeV^2，并在Breit坐标系中识别了喷流。喷流算法的性能和适用性，他们在强子类反应中的使用进行了研究，通过比较与KT算法进行的测量。次高阶QCD计算给出了很好的测量描述。本文还介绍了使用不同喷流算法测量的截面比;测量的断面比通过计算得到了很好的描述，计算中包括了O（λ）项。从数据中提取α值（Mz）;结果与从kT分析中提取的值兼容且具有相似的精度。

英文摘要：

For the first time, differential inclusive-jet cross sections have been measured in neutral current deep inelastic ep scattering using the anti-kT and SIScone algorithms. The measurements were made for boson virtualities Q^2 > 125 GeV^2 with the ZEUS detector at HERA using an integrated luminosity of 82 pb^-1 and the jets were identified in the Breit frame. The performance and suitability of the jet algorithms for their use in hadron-like reactions were investigated by comparing the measurements to those performed with the kT algorithm. Next-to-leading-order QCD calculations give a good description of the measurements. Measurements of the ratios of cross sections using different jet algorithms are also presented; the measured ratios are well described by calculations including up to O(alphas^3) terms. Values of alphas(Mz) were extracted from the data; the results are compatible with and have similar precision to the value extracted from the kT analysis.

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英文摘要：

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