On interference effects in top-philic decay chains

On interference effects in top-philic decay chains
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关于亲顶衰变链的干扰效应

DOI:
10.1016/j.physletb.2021.136618
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发表时间:
2021
期刊:
影响因子:
4.4
通讯作者:
Atkinson O
Atkinson O
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Atkinson O

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通过胶子融合通过顶夸克环产生的大量奇异希格斯玻色子与大的希格斯衰变概率相关,如果这些是运动学上可访问的。已知g g→ S→ t t特别容易受到信号背景干扰效应的影响,这会显著影响发现灵敏度。在这种情况下,识别更强大的签名,以提高发现灵敏度变得必要,将现象学的重点转移到最终状态,显示出减少破坏性的信号背景干扰。在这项工作中,我们讨论的信号信号和信号背景的衰变链的干扰效应的唯象相关性。特别是,我们确定的SM希格斯部门的标量扩展模型中的非对称级联衰变作为新的有前途的候选人。同时,如果将来有发现,特征干涉图可以为BSM扇区的间接CP光谱提供强大的工具。这激发了相关的搜索在目前和未来的对撞机作为强大的发现模式的新物理,除了作为一个敏感的工具,为重建的基础UV电弱势。
Sizeable exotic Higgs boson production through gluon fusion via top quark loops is correlated with large Higgs decay probabilities into top quark final states, if these are kinematically accessible. It is known that g g→ S→ t t¯ is particularly susceptible to signal-background interference effects that can significantly impact discovery sensitivities. In such an instance, identifying more robust signatures to enhance the discovery sensitivity becomes necessary, shifting phenomenological focus to final states that show a reduced destructive signal-background interference. In this work, we discuss the phenomenological relevance of signal-signal and signal-background interference effects for decay chains. In particular, we identify asymmetric cascade decays in models of scalar extensions of the SM Higgs sector as new promising candidates. In parallel, characteristic interference patterns can provide a formidable tool for indirect CP spectroscopy of BSM sectors if a discovery is made in the future. This motivates associated searches at present and future colliders as robust discovery modes of new physics, in addition to serving as a sensitive tool for the reconstruction of the underlying UV electroweak potential.
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