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arXiv 0706.3722hep-ex
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高Q^2深度非弹性散射中包含喷流产生的测量及强耦合的确定

Measurement of Inclusive Jet Production in Deep-Inelastic Scattering at High Q^2 and Determination of the Strong Coupling

H1 Collaboration

摘要:

利用HERA的H1探测器研究了大四动量转移平方Q^2>150 GeV^2时中性流正电子-质子深度非弹性散射中包含喷流的产生。在Breit坐标系中测量了单、双微分包容射流截面随Q^2和射流横向能量E_T的变化。在微扰QCD中,我们发现测量结果与次领先阶的计算结果吻合得很好。论证了强耦合的发生,并确定了α_s(M_Z)值。测量了包含射流截面与包含中性流截面的比值,并利用该比值求出了α_s(M_Z)=0.1193+/-0.0014(exp.)^ {+0.0047}_{-0.0030}(th.)+/- 0.0016(pdf)。

英文摘要:

Inclusive jet production is studied in neutral current deep-inelastic positron-proton scattering at large four momentum transfer squared Q^2>150 GeV^2 with the H1 detector at HERA. Single and double differential inclusive jet cross sections are measured as a function of Q^2 and of the transverse energy E_T of the jets in the Breit frame. The measurements are found to be well described by calculations at next-to-leading order in perturbative QCD. The running of the strong coupling is demonstrated and the value of alpha_s(M_Z) is determined. The ratio of the inclusive jet cross section to the inclusive neutral current cross section is also measured and used to extract a precise value for alpha_s(M_Z)=0.1193+/-0.0014(exp.)^{+0.0047}_{-0.0030}(th.)+/-0.0016(pdf).

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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