Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2003-08-20
Physics
High Energy Physics
High Energy Physics - Lattice
3 pages, talk presented at Lattice2003 (theoretical developments)
Scientific paper
10.1016/S0920-5632(03)02737-3
We consider the 3-d Gross-Neveu model in the broken phase and construct a stable brane world by means of a domain wall and an anti-wall. Fermions of opposite chirality are localized on the walls and coupled through the 3-d bulk. At large wall separation \beta the 2-d correlation length diverges exponentially, hence a 2-d observer cannot distinguish this situation from a 2-d space-time. The 3-d 4-fermion coupling and \beta fix the effective 2-d coupling such that the asymptotic freedom of the 2-d model arises. This mechanism provides criticality without fine tuning.
Bietenholz Wolfgang
Gfeller A.
Wiese Uwe-Jens
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