Unparticle Physics and Higgs Phenomenology
Unparticle Physics and Higgs Phenomenology
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DOI：
10.1016/j.physletb.2008.02.041
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发表时间：
2007-07
影响因子：
4.4
通讯作者：
T. Kikuchi;N. Okada
中科院分区：
文献类型：
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作者：
T. Kikuchi;N. Okada
最近，在概念上提出了超越标准模型的新物理，其中隐藏的共形扇区提供了通过低能有效理论中的高维算符耦合到标准模型扇区的“非粒子”。在几种可能性中，我们集中在涉及非粒子、希格斯二重态和规范玻色子的算符上。一旦希格斯二重态发展到真空期望值，共形对称性就被破坏，结果出现了非粒子和希格斯玻色子之间的混合。我们发现，这种混合可以导致希格斯玻色子与一对胶子和光子之间的耦合发生相当大的位移，因为这些耦合只存在于标准模型的回路水平上。这些Higgs耦合是CERN大型强子对撞机上寻找Higgs玻色子的最重要的耦合，其非粒子物理效应可以随着Higgs玻色子的发现而被观察到。
Recently, conceptually new physics beyond the Standard Model has been proposed, where a hidden conformal sector provides “unparticle” which couples to the Standard Model sector through higher dimensional operators in low energy effective theory. Among several possibilities, we focus on operators involving unparticle, the Higgs doublet and the gauge bosons. Once the Higgs doublet develops the vacuum expectation value, the conformal symmetry is broken and as a result, the mixing between unparticle and Higgs boson emerges. We find that this mixing can cause sizable shifts for the couplings between Higgs boson and a pair of gluons and photons, because these couplings exist only at the loop level in the Standard Model. These Higgs couplings are the most important ones for the Higgs boson search at the CERN Large Hadron Collider, and the unparticle physics effects may be observed together with the discovery of Higgs boson.