Adjoint string breaking in 4d SU(2) Yang-Mills theory

被引：56

作者：

de Forcrand, P ^{[1
]}

Philipsen, O

机构：

[1] ETH Honggerberg, CH-8093 Zurich, Switzerland

[2] CERN, TH, CH-1211 Geneva 23, Switzerland

来源：

PHYSICS LETTERS B | 2000年 / 475卷 / 3-4期

关键词：

D O I：

10.1016/S0370-2693(00)00117-9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We compute the static potential of adjoint sources in SU(2) Yang-Mills theory in four dimensions by numerical Monte Carlo simulations. Following a recent calculation in 2 + 1 dimensions, we employ a Variational approach involving string and gluelump operators and obtain clear evidence for string breaking and the saturation of the potential at large distances. For the string breaking scale we find r(b) approximate to 1.25 fm, 2.3r(0), or in units of the lightest glueball, r(b)m(0++) approximate to 9.7. We furthermore resolve the first excitation of the flux-tube and observe its breaking as well. The result for rb is in remarkable quantitative agreement with the three-dimensional one. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：280 / 288

页数：9

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