Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1996-08-16
Phys.Lett.B388:753-760,1996
Physics
High Energy Physics
High Energy Physics - Theory
13 pages, uses harvmac, one reference added
Scientific paper
10.1016/S0370-2693(96)01215-4
We study (non-renormalizable) five dimensional supersymmetric field theories. The theories are parametrized by quark masses and a gauge coupling. We derive the metric on the Coulomb branch exactly. We use stringy considerations to learn about new non-trivial interacting field theories with exceptional global symmetry $E_n$ ($E_8$, $E_7$, $E_6$, $E_5=Spin(10)$, $E_4=SU(5)$, $E_3=SU(3)\times SU(2)$, $E_2=SU(2)\times U(1)$ and $E_1=SU(2)$). Their Coulomb branch is ${\bf R}^+$ and their Higgs branch is isomorphic to the moduli space of $E_n$ instantons. One of the relevant operators of these theories leads to a flow to $SU(2)$ gauge theories with $N_f=n-1$ flavors. In terms of these $SU(2)$ IR theories this relevant parameter is the inverse gauge coupling constant. Other relevant operators (which become quark masses after flowing to the $SU(2)$ theories) lead to flows between them. Upon further compactifications to four and three dimensions we find new fixed points with exceptional symmetries.
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