Walking near a conformal fixed point: The 2-d O(3) model at θ≈π as a test case

被引：24

作者：

de Forcrand, P. ^{[1
,2
]}

Pepe, M. ^{[3
]}

Wiese, U. -J. ^{[4
]}

机构：

[1] ETH, Inst Theoret Phys, CH-8093 Zurich, Switzerland

[2] CERN, Dept Phys, CH-1211 Geneva 23, Switzerland

[3] Ist Nazl Fis Nucl, Sez Milano Bicocca, I-20126 Milan, Italy

[4] Univ Bern, Inst Theoret Phys, Albert Einstein Ctr Fundamental Phys, CH-3012 Bern, Switzerland

来源：

PHYSICAL REVIEW D | 2012年 / 86卷 / 07期

关键词：

PHASE-STRUCTURE; SPECTRUM; DYNAMICS; COMPUTE;

D O I：

10.1103/PhysRevD.86.075006

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Slowly walking technicolor models provide a mechanism for electroweak symmetry breaking whose nonperturbative lattice investigation is rather challenging. Here we demonstrate walking near a conformal fixed point considering the 2-d lattice O(3) model at vacuum angle theta approximate to pi. The essential features of walking technicolor models are shared by this toy model and can be accurately investigated by numerical simulations. We show results for the running coupling and the beta-function, and we perform a finite-size scaling analysis of the mass gap close to the conformal point.

引用

页数：5

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