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arXiv 1402.7334hep-th
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纯量规范场

Scalar gauge fields

Eduardo I. Guendelman, Douglas Singleton

摘要:

本文给出了一种变形的规范程序,它除了通常的矢量规范场$A_μ(x)$外,还采用了标量规范场$B (x)$。我们在具有U(1)对称性的复标量物质场$ϕ(x)$的背景下研究通常规范过程的这种变体。我们将主要关注当$ϕ$通过自发对称性破缺产生真空期望值时的情况。我们发现,在这些条件下的标量规范场混合的戈德斯通玻色子,产生的全球对称性的破缺。这个标量规范模型的其他一些有趣的特点是:(i)新的规范程序产生违反C和CP对称性的条款。这可能有应用在宇宙学或CP破坏粒子物理学;(ii)存在的质量条款的拉格朗日尊重新的扩展规范对称性。因此,即使在没有通常的希格斯机制的情况下,人们也可以有规范场质量项;(iii)标量规范场的正弦-戈登势的出现;(iv)标量规范玻色子的相互作用强度的自然的、轴子样的抑制。

英文摘要:

In this paper we give a variation of the gauge procedure which employs a scalar gauge field, $B (x)$, in addition to the usual vector gauge field, $A_μ(x)$. We study this variant of the usual gauge procedure in the context of a complex scalar, matter field $ϕ(x)$ with a U(1) symmetry. We will focus most on the case when $ϕ$ develops a vacuum expectation value via spontaneous symmetry breaking. We find that under these conditions the scalar gauge field mixes with the Goldstone boson that arises from the breaking of a global symmetry. Some other interesting features of this scalar gauge model are: (i) The new gauge procedure gives rise to terms which violate C and CP symmetries. This may have have applications in cosmology or for CP violation in particle physics; (ii) the existence of mass terms in the Lagrangian which respect the new extended gauge symmetry. Thus one can have gauge field mass terms even in the absence of the usual Higgs mechanism; (iii) the emergence of a sine-Gordon potential for the scalar gauge field; (iv) a natural, axion-like suppression of the interaction strength of the scalar gauge boson.

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