The phase structure of an eight-fermion interaction model is investigated in a compact space-time with non-trivial topology, MD−1⊗S1. The phase boundary dividing the symmetric and the broken phase is shown as a function of the space-time dimensions. It is found that the eight-fermion interaction does not modify the phase boundary for the chiral symmetry breaking.
@article{arxiv.0812.2766,
title = {Four- and eight-fermion interactions in a space-time with non-trivial topology},
author = {Tomohiro Inagaki},
journal= {arXiv preprint arXiv:0812.2766},
year = {2008}
}