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arXiv 2501.09796hep-phhep-ex
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Drell-Yan过程对带电标量粒子的约束:弱同位旋视角

Drell-Yan constraints on charged scalars: a weak isospin perspective

Avik Banerjee, Dipankar Das, Samadrita Mukherjee, Shreya Pandey

AI总结:

本研究从弱同位旋视角出发,利用LHC现有数据和唯象分析,通过Drell-Yan过程对不同质量、电荷及同位旋的单/双电荷标量粒子分支比设限,无需依赖特定模型,并在扩展Higgs模型中验证了方法有效性。

摘要:

带电标量粒子出现在许多有理论依据的标准模型扩展理论中。我们分析了大型强子对撞机(LHC)上通过Drell-Yan过程产生的带电标量对的约束,并从弱同位旋量子数的角度对其进行解读。利用现有LHC数据的实验限值和唯象重铸分析,我们对带电标量的分支比设定了界限,该界限是其质量、电荷及同位旋的函数。这种方法无需依赖特定模型,可直接从实验数据确定分支比的限值。我们针对多种弱同位旋情形下的单电荷和双电荷标量粒子开展了详细分析,重点关注其衰变为轻子和玻色子末态的过程,并在Higgs三重态模型、Georgi-Machacek模型等扩展Higgs区中验证了该方法的有效性。

英文摘要:

Charged scalars appear in many motivated extensions beyond the Standard Model. We analyze the constraints on charged scalar pair production via the Drell-Yan process at the Large Hadron Collider and interpret them in terms of weak isospin quantum numbers. Leveraging the experimental limits from existing LHC data and phenomenological recast analyses, we place bounds on the branching ratio of the charged scalar, as a function of its mass, electric charge, and isospin. This approach enables to determine limits on the branching ratios directly from experimental data, without appealing to a specific model. We provide a detailed analysis for singly and doubly charged scalars across various weak isospin scenarios, focusing on decays into leptonic and bosonic final states, and validate this approach in extended Higgs sectors such as the Higgs triplet model and Georgi-Machacek model.

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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