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arXiv 0705.1584hep-phhep-th
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畴壁膜上的标准模型?

The standard model on a domain-wall brane?

Rhys Davies, Damien P. George, Raymond R. Volkas

摘要:

我们提出了一个4+1维的行动,这是一个候选人实现一个标准的模型,如有效的理论领域动态本地化的域壁膜。我们的建设是部分基于猜想Dvali-Shifman机制的动态本地化规范玻色子正确的工作在4+1-d。假设是这样,我们要求规范对称性在体中是SU(5),在畴壁内自发破缺为SU(3)xSU(2)xU(1),从而动态地定域标准模型规范玻色子,前提是体中的SU(5)理论表现出禁闭。这堵墙是由一个配置为扭结的实单态希格斯场eta和一个在墙内取非零值的SU(5)伴随希格斯场chi共同创造的。手征3+1维夸克和轻子通过它们与η和χ的汤川耦合被限制并沿着体方向分裂。希格斯偶态和它的色三重态SU(5)伙伴也是类似的定域和分裂。这种分裂抑制了色希格斯粒子引起的质子衰变,并且由于局域分布的不同,通常的SU(5)质量关系m_e = m_d没有出现。局部重力是通过Randall-Sundrum替代紧致化产生的。

英文摘要:

We propose a 4+1-dimensional action that is a candidate for realising a standard-model-like effective theory for fields dynamically localised to a domain-wall brane. Our construction is based in part on the conjecture that the Dvali-Shifman mechanism for dynamically localising gauge bosons works correctly in 4+1-d. Assuming this to be so, we require the gauge symmetry to be SU(5)in the bulk, spontaneously breaking to SU(3)xSU(2)xU(1) inside the domain wall, thus dynamically localising the standard model gauge bosons provided that the SU(5) theory in the bulk exhibits confinement. The wall is created jointly by a real singlet-Higgs field eta configured as a kink, and an SU(5) adjoint-Higgs field chi that takes nonzero values inside the wall. Chiral 3+1-dimensional quarks and leptons are confined and split along the bulk direction via their Yukawa couplings to eta and chi. The Higgs doublet and its colour triplet SU(5) partner are similarly localised and split. The splittings suppress coloured-Higgs-induced proton decay and, because of the different localisation profiles, the usual SU(5) mass relation m_e = m_d does not arise. Localised gravity is generated via the Randall-Sundrum alternative to compactification.

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