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arXiv 0904.3487hep-ex
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在HERA从衰变到μ子的深度非弹性ep散射中的魅力和美丽产生的测量

Measurement of charm and beauty production in deep inelastic ep scattering from decays into muons at HERA

The ZEUS Collaboration, S. Chekanov

摘要:

在四动量交换平方Q^2>20 GeV ^2的情况下,用HERA的ZEUS探测器测量了在ep相互作用中粲夸克和美夸克的产生,使用的积分亮度为126 pb^{-1}。通过衰变为μ子,人们发现了魅夸克和美夸克。测量了μ子横动量p_T^μ>1.5 GeV和赝势-1.6<η^μ<2.3时的微分截面,它是p_T^μ、η^μ、Q^2和Bjorken x的函数。并提取了对质子结构函数F_2的魅力贡献。结果与以前的独立技术的基础上的测量和QCD预测很好地描述。

英文摘要:

The production of charm and beauty quarks in ep interactions has been measured with the ZEUS detector at HERA for squared four-momentum exchange Q^2>20 GeV^2, using an integrated luminosity of 126 pb^{-1}. Charm and beauty quarks were identified through their decays into muons. Differential cross sections were measured for muon transverse momenta p_T^μ>1.5 GeV and pseudorapidities -1.6<η^μ<2.3, as a function of p_T^μ, η^μ, Q^2 and Bjorken x. The charm and beauty contributions to the proton structure function F_2 were also extracted. The results agree with previous measurements based on independent techniques and are well described by 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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