Kaluza-Klein gravitons at LHC2
Kaluza-Klein gravitons at LHC2
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DOI：
10.1103/physrevd.96.035008
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发表时间：
2017-04
影响因子：
5
通讯作者：
Barry M. Dillon;Verónica Sanz
中科院分区：
文献类型：
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作者：
Barry M. Dillon;Verónica Sanz
在这项工作中，我们研究的约束条件，从新的搜索重粒子在LHC上的允许质量和耦合的KK引力子在全息复合希格斯模型。保持新的电弱态重，使电弱精度测试是满意的，我们控制的质量最轻的KK引力子使用膜动力学项。用这个我们研究KK引力子质量从0.5-3 TeV。在我们的分析中，我们还采用了小兰德尔-桑德拉姆（RS）模型，其特征在于在5D模型中具有较低的UV尺度，这反过来又意味着修改耦合到无质量的体场。将这种情况视为具有复合希格斯玻色子的强耦合4D理论，KK引力子被解释为复合自旋2态，并且变化的UV尺度对应于低能有效理论的截止值和普朗克尺度之间变化的中间尺度。我们发现，质量在0.5-3 TeV范围内的KK引力子与当前的对撞机约束是兼容的，其中最有前途的通道检测这些状态是双光子和ZZ通道。在小的RS模型中，双规范理论比传统的RS模型具有更多的颜色。
In this work we study constraints from new searches for heavy particles at the LHC on the allowed masses and couplings of a KK Graviton in a holographic composite Higgs model. Keeping new electroweak states heavy such that electroweak precision tests are satisfied, we control the mass of the lightest KK graviton using a brane kinetic term. With this we study KK graviton masses from 0.5-3 TeV. In our analysis we also employ Little Randall-Sundrum (RS) Models, characterised by a lower UV scale in the 5D model which in turn implies modified couplings to massless bulk fields. Viewing this scenario as a strongly coupled 4D theory with a composite Higgs boson, the KK graviton is interpreted as a composite spin-2 state and the varying UV scale corresponds to a varying intermediate scale between the cutoff of the low energy effective theory and the Planck scale. We find that KK gravitons with masses in the range 0.5-3 TeV are compatible with current collider constraints, where the most promising channels for detecting these states are the di-photon and ZZ channels. A detection is more likely in the little RS models, in which the dual gauge theory has a larger number of colours than in traditional RS models.