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arXiv 2409.04741hep-ph
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半可见喷注 + X:用辐射照亮暗簇射

Semi-visible jets + X: Illuminating Dark Showers with Radiation

Bingxuan Liu, Kevin Pedro

AI总结:

本文研究了在LHC利用初态辐射搜索半可见喷注的潜力,通过分解丢失横向动量重建介子质量并定义测量暗强子比例的新观测量,结合两者提出完整搜索策略以探测整个模型参数空间。

摘要:

我们研究了在大型强子对撞机(LHC)中利用初态辐射(ISR)搜索半可见喷注(SVJs)的潜力。我们考虑了光子ISR和喷注ISR两种通道,使用了一个轻子$Z^\prime$介子衰变形成两个SVJs的基准信号模型。我们比较并扩展了几种将丢失横向动量分解为每喷注贡献的技术,以重建介子质量,并定义了一个测量不可见暗强子比例的新观测量。ISR的存在促进了SVJs的识别,由此产生的增强提升了观测量的分辨率,特别是在不可见比例较高的模型中。我们结合这两个观测量提出了一套完整的搜索策略,并讨论了该策略向探测整个模型参数空间的扩展。

英文摘要:

We investigate the potential to search for semi-visible jets (SVJs) at the Large Hadron Collider (LHC) using initial-state radiation (ISR). Both photon ISR and jet ISR channels are considered, using a benchmark signal model with the decay of a leptophobic $Z^\prime$ mediator forming two SVJs. We compare and extend several techniques to decompose the missing transverse momentum into per-jet contributions, in order to reconstruct the mediator mass and to define a new observable measuring the fraction of invisible dark hadrons. The presence of ISR facilitates the identification of the SVJs, and the resulting boost improves the resolution of the observables, especially for models with high invisible fractions. We combine the two observables to propose a complete search strategy and discuss an extension of the strategy to probe the whole model parameter space.

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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