Localized U(1) gauge fields, millicharged particles, and holography

被引：90

作者：

Batell, B ^{[1
]}

Gherghetta, T ^{[1
]}

机构：

[1] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA

来源：

PHYSICAL REVIEW D | 2006年 / 73卷 / 04期

关键词：

D O I：

10.1103/PhysRevD.73.045016

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We consider U(1) gauge fields in a slice of AdS(5) with bulk and boundary mass parameters. The zero mode of a bulk U(1) gauge field can be localized either on the UV or IR brane. This leads to a simple model of millicharged particles in which fermions can have arbitrarily small electric charge. In the electroweak sector we also discuss phenomenological implications of a localized U(1)(Y) gauge boson. Using the AdS/CFT correspondence we present the 4D holographic interpretation of the 5D model. In particular the photon is shown to be a composite particle when localized near the IR brane, whereas it is elementary when localized near the UV brane. In the dual interpretation the millicharge results from an elementary fermion coupling to a composite photon via a vector current with large anomalous dimension.

引用

页数：13

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