期刊
PHYSICS LETTERS B
卷 690, 期 5, 页码 514-518出版社
ELSEVIER
DOI: 10.1016/j.physletb.2010.05.070
关键词
Non-Abelian strings; Vacuum polarization energy; Spectral methods; Renormalization
We improve on a method to compute the fermion contribution to the vacuum polarization energy of string-like configurations in a non-Abelian gauge theory. We establish the new method by numerically verifying the invariance under (a subset of) local gauge transformations. This also provides further support for the use of spectral methods to compute vacuum polarization energies in general. We confirm that the vacuum energy in the (MS) over bar renormalization scheme is tiny as compared to the mass of the fluctuating fermion field. Numerical results for the physical on-shell scheme are also presented. (C) 2010 Elsevier B.V. All rights reserved.
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