Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1992-10-28
Phys.Rev.Lett. 70 (1993) 884-887
Physics
High Energy Physics
High Energy Physics - Theory
(ten pages, latex, figures included)
Scientific paper
10.1103/PhysRevLett.70.884
By computing anomalous dimensions of gauge invariant composite operators $(\bar\psi\psi)^n$ and $(\phi^*\phi)^n$ in Chern-Simons fermion and boson models, we address that Chern-Simons interactions make these operators more relevant or less irrelevant in the low energy region. We obtain a critical Chern-Simons fermion coupling, ${1\over \kappa_c^2} = {6\over 19}$, for a phase transition at which the leading irrelevant four-fermion operator $(\bar\psi\psi)^2$ becomes marginal, and a critical Chern-Simons boson coupling, ${1\over \kappa_c^2} = {6\over 34}$, for a similar phase transition for the leading irrelevant operator $(\phi^*\phi)^4$. We see this phenomenon also in the $1/N$ expansion.
Chen Wei
Li Miao
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