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arXiv 0802.3955hep-ex
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HERA带电电流e ~+-p散射的多喷流截面

Multi-jet cross sections in charged current e+-p scattering at HERA

ZEUS Collaboration, S. Chekanov

摘要:

在高玻色子虚度Q ^[2]条件下,利用HERA II的ZEUS探测器测量了带电电流深度非弹性e+-p散射中的喷流截面,其积分亮度为0.36 fb^-1。微分截面是包含喷流产生的Q^2、比约肯x和喷流横向能量和赝快度的函数。给出了双喷射不变质量截面。本文首次报道了在荷电e ~+-p过程中观测到的三喷流和四喷流事件。的预测下一个领先阶(NLO)QCD计算进行比较的测量。测量的包含射流截面的形状和归一化的NLO预测很好地描述。数据有可能约束质子中的u和d价夸克分布,如果包括作为输入到全球拟合。

英文摘要:

Jet cross sections were measured in charged current deep inelastic e+-p scattering at high boson virtualities Q^2 with the ZEUS detector at HERA II using an integrated luminosity of 0.36 fb^-1. Differential cross sections are presented for inclusive-jet production as functions of Q^2, Bjorken x and the jet transverse energy and pseudorapidity. The dijet invariant mass cross section is also presented. Observation of three- and four-jet events in charged-current e+-p processes is reported for the first time. The predictions of next-to-leading-order (NLO) QCD calculations are compared to the measurements. The measured inclusive-jet cross sections are well described in shape and normalization by the NLO predictions. The data have the potential to constrain the u and d valence quark distributions in the proton if included as input to global fits.

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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