Gauge coupling unification with extra dimensions and gravitational scale effects

被引：27

作者：

Cheng, HC

Dobrescu, BA

Hill, CT

机构：

[1] Fermi Natl Accelerator Lab, Batavia, IL 60510 USA

[2] Univ Chicago, Chicago, IL 60510 USA

来源：

NUCLEAR PHYSICS B | 2000年 / 573卷 / 03期

关键词：

D O I：

10.1016/S0550-3213(99)00816-0

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We study gauge coupling unification in the presence of extra dimensions compactified at a few TeV. Achieving unification requires a large number of gauge boson Kaluza-Klein excitations lighter than the string scale, such that the higher-dimensional gauge couplings are partial derivative(1) in string scale units. Corrections to the gauge couplings from two or more loops are about 10% or larger, hence string (or M) theory is generally expected to be strongly coupled in similar to TeV-scale extra-dimensional scenarios. Higher-dimensional operators induced by quantum gravitational effects can shift the gauge couplings by a few percent. These effects are sufficiently large that even the minimal Standard Model, or the MSSM, allow unification at a scale in the similar to TeV range. The strongly coupled unified theory may induce dynamical electroweak symmetry breaking. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：597 / 616

页数：20

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