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arXiv 2407.09600hep-phhep-ex
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SMEFT中的三玻色子产生

Triboson production in the SMEFT

Eugenia Celada, Gauthier Durieux, Ken Mimasu, Eleni Vryonidou

AI总结:

本研究在SMEFT框架下于QCD次领头阶研究LHC三玻色子产生,发现QCD修正幅度大且与标准模型结果有差异,指出三玻色子过程的额外灵敏度主要来自希格斯共振贡献,需结合希格斯数据做全局分析以评估其对重新物理的探测潜力。

摘要:

我们在标准模型有效场论(SMEFT)框架下,于六维算符水平及QCD次领头阶精度,研究大型强子对撞机(LHC)上的三种电弱规范玻色子产生过程。我们给出了包含截面与微分分布的结果,发现这些QCD修正幅度较大,通常随相空间变化,且与标准模型中观测到的结果存在显著差异。随后我们探究了近期观测到的三玻色子产生过程,对提升电弱精确可观测量与双玻色子数据带来的灵敏度的潜力。我们观测到的额外灵敏度主要由希格斯玻色子的共振贡献主导,尤其是其衰变为双光子的过程。因此,为公平评估三玻色子测量对重新物理的未来探测范围,需要开展包含希格斯玻色子数据的全局分析。

英文摘要:

We study the production of three electroweak gauge bosons at the LHC, in the effective field theory of the standard model, at dimension six and next-to-leading order in QCD. We present results for inclusive cross-sections and differential distributions, finding that these QCD corrections are large, often vary across the phase-space and notably differ from those observed in the standard model. We then explore the potential of the recently observed triboson production processes for improving the sensitivity brought by electroweak precision observables and diboson data. The additional sensitivity we observe is dominated by resonant Higgs boson contributions, with decays to photon pairs in particular. A global analysis including Higgs boson data is therefore needed for a fair assessment of the future reach of triboson measurements on heavy new physics.

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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