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arXiv 1206.7007hep-ex
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高Q2区与HERA区纵向极化轻子束的包含性深度非弹性散射

Inclusive Deep Inelastic Scattering at High Q2 with Longitudinally Polarised Lepton Beams at HERA

H1 Collaboration

摘要:

用HERA的H1探测器测量了中性和带电电流深度非弹性散射过程的包含e \pmp单、双微分截面。这些数据是在质量中心能量为\surds = 319 GeV的情况下获得的,两个轻子束电荷和两个纵向轻子偏振模式之间的总积分亮度为333.7 pb-1。微分截面的测量范围为负四动量转移平方Q2,在60 ~ 50 000 GeV ~ 2之间,比约肯x在0.0008 ~ 0.65之间。将测量结果与早期发表的非极化H1数据相结合,以提高统计精度,并用于确定结构函数xF_3 ^gammaZ。首次测量了中性电流宇称破坏结构函数F_2 ^γ Z。还测量了充电电流总截面的极化依赖性。新的测量是很好地描述了次领先阶QCD拟合的基础上,所有公布的H1包容截面数据,用于提取质子的部分子分布函数。

英文摘要:

Inclusive e\pmp single and double differential cross sections for neutral and charged current deep inelastic scattering processes are measured with the H1 detector at HERA. The data were taken at a centre-of-mass energy of \surds = 319GeV with a total integrated luminosity of 333.7 pb-1 shared between two lepton beam charges and two longitudinal lepton polarisation modes. The differential cross sections are measured in the range of negative fourmomentum transfer squared, Q2, between 60 and 50 000GeV2, and Bjorken x between 0.0008 and 0.65. The measurements are combined with earlier published unpolarised H1 data to improve statistical precision and used to determine the structure function xF_3^gammaZ. A measurement of the neutral current parity violating structure function F_2^gammaZ is presented for the first time. The polarisation dependence of the charged current total cross section is also measured. The new measurements are well described by a next-to-leading order QCD fit based on all published H1 inclusive cross section data which are used to extract the parton distribution functions of the proton.

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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