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arXiv 0812.3775hep-ex
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在HERA使用寿命标记测量深度非弹性散射中D+和D0的产生

Measurement of D+- and D0 production in deep inelastic scattering using a lifetime tag at HERA

ZEUS Collaboration, S. Chekanov

摘要:

在HERA用ZEUS探测器测量了D+和D 0介子的产生,其积分亮度为133.6 pb-1。测量范围为5 < Q^2 < 1000 GeV^2,0.02 < y < 0.7,1.5 < p_T^D < 15 GeV和eta^D < 1.6。通过使用ZEUS微顶点探测器重建位移的次顶点,减少了D介子信号的组合背景。产生截面与次-首阶QCD的预测进行了比较,发现次-首阶QCD能很好地描述数据。将测量外推到全运动学相空间,以获得对质子结构函数F2的开魅贡献F2 ^ccbar。

英文摘要:

The production of D+- and D0 mesons has been measured with the ZEUS detector at HERA using an integrated luminosity of 133.6 pb-1. The measurements cover the kinematic range 5 < Q^2 < 1000 GeV^2, 0.02 < y < 0.7, 1.5 < p_T^D < 15 GeV and eta^D < 1.6. Combinatorial background to the D meson signals is reduced by using the ZEUS microvertex detector to reconstruct displaced secondary vertices. Production cross sections are compared with the predictions of next-to-leading-order QCD which is found to describe the data well. Measurements are extrapolated to the full kinematic phase space in order to obtain the open-charm contribution, F2^ccbar, to the proton structure function, F2.

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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