BSM reach of four-top production at the LHC
BSM reach of four-top production at the LHC
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DOI：
10.1103/physrevd.108.035001
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发表时间：
2023-08
影响因子：
5
通讯作者：
Anisha;Oliver Atkinson;Akanksha Bhardwaj;Christoph Englert;Wrishik Naskar;Panagiotis Stylianou
中科院分区：
文献类型：
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作者：
Anisha;Oliver Atkinson;Akanksha Bhardwaj;Christoph Englert;Wrishik Naskar;Panagiotis Stylianou
许多超出标准模型（BSM）物理学的场景产生了新的亲顶相互作用，这些相互作用可以在质子机器（如大型强子对撞机）上通过各种产生和衰变模式进行探测。一方面，这可以在发现时详细确定BSM模型的参数，并且可以在非主导生产模式中实现额外的灵敏度。另一方面，由于干扰效应，胶子融合等优势生产模式下的朴素窄宽度近似可能不适用于某些BSM参数区域，这有效地使不那么优势的生产模式在这种情况下更具相关性。在这项工作中，我们在LHC的四个顶夸克最终态的背景下考虑了这两个问题。首先，我们表明可以通过应用目标图神经网络技术来增强SM的潜力，该技术利用了超越切割和计数方法的数据相关性。其次，我们发现，在胶子融合过程中，破坏干扰效应会降低亲顶态的BSM灵敏度，而通过转向四个顶终态，这些干扰效应在很大程度上可以避免。这实现了相当大的排斥势，例如，两个希格斯双重态模型。这进一步激发了在不久的将来LHC发现BSM的敏感工具的四个顶级最终态。DOI: 10.1103 / PhysRevD.108.035001
Many scenarios of beyond the Standard Model (BSM) physics give rise to new top-philic interactions that can be probed at proton machines such as the Large Hadron Collider through a variety of production and decay modes. On the one hand, this will enable a detailed determination of the BSM model ’ s parameters when a discovery is made and additional sensitivity in nondominant production modes can be achieved. On the other hand, the naive narrow width approximation in dominant production modes such as gluon fusion might be inadequate for some BSM parameter regions due to interference effects, effectively making less dominant production modes more relevant in such instances. In this work, we consider both these questions in the context of four top quark final states at the LHC. First, we show that the SM potential can be enhanced through the application of targeted graph neural network techniques that exploit data correlations beyond cut-and-count approaches. Second, we show that destructive interference effects that can degrade BSM sensitivity of top-philic states from gluon fusion are largely avoided by turning to four top final states. This achieves considerable exclusion potential, e.g., the two Higgs doublet model. This further motivates four top final states as sensitive tools for BSM discovery in the near future of the LHC. DOI: 10.1103/PhysRevD.108.035001