Anomalies in M-theory on singular G2-manifolds

被引:5
作者
Bilal, A
Metzger, S
机构
[1] Ecole Normale Super, CNRS, Phys Theor Lab, F-75231 Paris 05, France
[2] Univ Munich, Sekt Phys, D-8000 Munich, Germany
关键词
D O I
10.1016/j.nuclphysb.2003.08.044
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
When M-theory is compactified on G(2)-holonomy manifolds with conical singularities, charged chiral fermions are present and the low-energy four-dimensional theory is potentially anomalous. We reconsider the issue of anomaly cancellation, first studied by Witten. We propose a mechanism that provides local cancellation of all gauge and mixed gauge-gravitational anomalies, i.e., separately for each conical singularity. It is similar in spirit to the one used to cancel the normal bundle anomaly in the presence of five-branes. It involves smoothly cutting off all fields close to the conical singularities, resulting in an anomalous variation of the 3-form C and of the non-abelian gauge fields present if there are also ADE singularities. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:239 / 263
页数:25
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