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arXiv 1609.05883hep-ph
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一个UV部分完备的composite-pNGB Higgs

A UV complete partially composite-pNGB Higgs

Jamison Galloway, Alexander L. Kagan, Adam Martin

摘要:

我们探讨了一个电弱对称性破缺(EWSB)方案的基础上的一个基本的希格斯二重态和SU(4)/Sp(4)复合pseudo-Nambu-Goldstone二重态的混合物-玻色子的人工色/诱导EWSB的一个特殊表现。假设基本希格斯质量参数为正,EWSB是由双重态的混合触发的。这种设置有几个有吸引力的特点和现象学的后果,我们强调:i)不同于传统的玻色人工色模型,$Λ_{\rm TC}$和电弱标度之间的层次结构依赖于真空(mis)对齐,可以是相当大的,产生一个有吸引力的框架,为自然EWSB; ii)由于强扇区基于SU(4)/Sp(4),因此基本的(UV-完全)强扇区的描述是可能的,即由晶格通知;最轻的矢量共振出现在Sp(4)的10重态、5重态和单重态。错位导致$S$参数中的10重态“宇称加倍”抵消,以及被抑制的5重态贡献; iv)希格斯耦合偏差通常是$\mathcal O(1\%)$的; v)10重态等重态共振主要衰变为大质量的介子和规范玻色子,或者介子对,而不是规范玻色子或费米子对;此外,它们与费米子的耦合很小。因此,从传统的重向量三元组搜索的这种设置的界限是弱的。简要描述了超对称$U(1)_R$对称实现。

英文摘要:

We explore an electroweak symmetry breaking (EWSB) scenario based on the mixture of a fundamental Higgs doublet and an SU(4)/Sp(4) composite pseudo-Nambu-Goldstone doublet -- a particular manifestation of bosonic technicolor/induced EWSB. Taking the fundamental Higgs mass parameter to be positive, EWSB is triggered by the mixing of the doublets. This setup has several attractive features and phenomenological consequences, which we highlight: i) Unlike traditional bosonic technicolor models, the hierarchy between $Λ_{\rm TC}$ and the electroweak scale depends on vacuum (mis)alignment and can be sizable, yielding an attractive framework for natural EWSB; ii) As the strong sector is based on SU(4)/Sp(4), a fundamental (UV-complete) description of the strong sector is possible, that is informed by the lattice; iii) The lightest vector resonances occur in the 10-plet, 5-plet and singlet of Sp(4). Misalignment leads to a 10-plet "parity-doubling" cancelation in the $S$ parameter, and a suppressed 5-plet contribution; iv) Higgs coupling deviations are typically of $\mathcal O(1\%)$; v) The 10-plet isotriplet resonances decay dominantly to a massive technipion and a gauge boson, or to technipion pairs, rather than to gauge boson or fermion pairs; moreover, their couplings to fermions are small. Thus, the bounds on this setup from conventional heavy-vector-triplet searches are weak. A supersymmetric $U(1)_R$ symmetric realization is briefly described.

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