Twin Higgs mechanism and a composite Higgs boson
Twin Higgs mechanism and a composite Higgs boson
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DOI：
10.1103/physrevd.91.095012
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发表时间：
2015-01
影响因子：
5
通讯作者：
M. Low;A. Tesi;Lian-tao Wang
中科院分区：
文献类型：
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作者：
M. Low;A. Tesi;Lian-tao Wang
我们将双希格斯机制与复合希格斯模型的范例结合起来。在这类模型中，希格斯粒子是来自TeV尺度附近强耦合扇区的伪nambu - goldstone玻色子，并且由于孪生机制，它还受到离散对称的保护。我们讨论了与此设置相关的模型构建问题，并量化了实现正确的电弱真空和希格斯质量所需的调谐。与标准的复合希格斯模型相比，与顶部部分相关的最轻的共振是未着色的镜面顶部，而彩色的顶部伙伴可以在参数上更重而无需额外调整。在某些情况下，预计矢量共振位于多tev范围内。我们提出了共振——费米子和向量——更重的模型，减轻了直接搜索对自然性的压力，这表明低调谐的理论可能在大型强子对撞机的约束下存活下来。
We combine the twin Higgs mechanism with the paradigm of composite Higgs models. In this class of models the Higgs is a pseudo-Nambu-Goldstone boson from a strongly coupled sector near the TeV scale, and it is additionally protected by a discrete symmetry due to the twin mechanism. We discuss the model-building issues associated with this setup and quantify the tuning needed to achieve the correct electroweak vacuum and the Higgs mass. In contrast to standard composite Higgs models, the lightest resonance associated with the top sector is the uncolored mirror top, while the colored top partners can be made parameterically heavier without extra tuning. In some cases, the vector resonances are predicted to lie in the multi-TeV range. We present models where the resonances---both fermions and vectors---being heavier alleviates the pressure on naturalness coming from direct searches demonstrating that theories with low tuning may survive constraints from the Large Hadron Collider.