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arXiv 1206.4346hep-ex
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在HERA使用H1探测器使用双电子事件测量阈值附近的美容光产生

Measurement of Beauty Photoproduction near Threshold using Di-electron Events with the H1 Detector at HERA

H1 Collaboration

摘要:

在电子对撞机HERA上,用H1探测器测量了光生产物中ep -> e b \bar{b} X的截面。衰变通道b \bar{b} -> ee X'通过识别b夸克的半电子衰变来选择。总产生截面是在光子虚量Q^2 <= 1 GeV^2、非弹性0.05 <= y <= 0.65和b夸克赝快度的运动学范围内测量的|eta(b)|,|eta(\bar{b})|<= 2。微分产生截面是美夸克<P_T(b)>的平均横动量的函数。结果进行了比较,下一个领导阶QCD预测。

英文摘要:

The cross section for ep -> e b\bar{b} X in photoproduction is measured with the H1 detector at the ep-collider HERA. The decay channel b\bar{b} -> ee X' is selected by identifying the semi-electronic decays of the b-quarks. The total production cross section is measured in the kinematic range given by the photon virtuality Q^2 <= 1 GeV^2, the inelasticity 0.05 <= y <= 0.65 and the pseudorapidity of the b-quarks |eta(b)|,|eta(\bar{b})| <= 2. The differential production cross section is measured as a function of the average transverse momentum of the beauty quarks <P_T(b)> down to the threshold. The results are compared to next-to-leading-order QCD predictions.

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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