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arXiv 1206.7110hep-phhep-ex
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低质量的希格斯粒子在一个圈及更远的地方衰变为四个轻子

Low-mass Higgs decays to four leptons at one loop and beyond

Bernd A. Kniehl, Oleg L. Veretin

摘要:

在CERN LHC和费米实验室Tevatron获取的数据中正在进行的对希格斯玻色子信号的搜索关键地依赖于衰变通道H -> Zll和H -> Wlnu。我们对这些衰变通道的部分宽度进行了精确的研究,包括完整的单圈电弱修正以及O(G_F m_t^2 α_s^2)、O(G_F m_t^2 α_s^2)和O(G_F m_t^2 α_s^2)在两圈和三圈的主要贡献。由于离壳中间玻色子的不变质量在目前感兴趣的质量窗口115 GeV < m_H < 129 GeV中相对较低,轻子质量效应是相关的,特别是对于τ轻子。

英文摘要:

The ongoing searches for Higgs-boson signals in data taken at the CERN LHC and the Fermilab Tevatron crucially rely on the decay channels H -> Z l l and H -> W l nu. We present a precision study of the partial widths of these decay channels including the full one-loop electroweak corrections and the dominant contributions at two and three loops, of O(G_F^2 m_t^4), O(G_F m_t^2 alpha_s), and O(G_F m_t^2 alpha_s^2). Since the invariant mass of the off-shell intermediate boson is relatively low in the mass window 115 GeV < m_H < 129 GeV of current interest, lepton mass effects are relevant, especially for the tau lepton.

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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