Effective Actions near Singularities
高能物理 - 理论
2009-11-10 v3
摘要
We study the heterotic string compactified on K3 x T^2 near the line T=U, where the effective action becomes singular due to an SU(2) gauge symmetry enhancement. By `integrating in' the light W^\pm vector multiplets we derive a quantum corrected effective action which is manifestly SU(2) invariant and non-singular. This effective action is found to be consistent with a residual SL(2,Z) quantum symmetry on the line T=U. In an appropriate decompactification limit, we recover the known SU(2) invariant action in five dimensions.
引用
@article{arxiv.hep-th/0301125,
title = {Effective Actions near Singularities},
author = {Jan Louis and Thomas Mohaupt and Marco Zagermann},
journal= {arXiv preprint arXiv:hep-th/0301125},
year = {2009}
}
备注
33 pages, LaTeX. v2: cosmetic correction on titlepage. v3: references and note added