On conformal field theories in four-dimensions
Mar, 1998
8 pages
Published in:
- Nucl.Phys.B 533 (1998) 199-209
e-Print:
- hep-th/9803015 [hep-th]
Report number:
- HUTP-98-A015,
- ITEP-TH-15-98
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Abstract:
Extending recent work of Kachru and Silverstein, we consider ``orbifolds'' of 4-dimensional \CN=4 SU(n) super-Yang-Mills theories with respect to discrete subgroups of the SU(4) -symmetry which act nontrivially on the gauge group. We show that for every discrete subgroup of SU(4) there is a canonical choice of imbedding of the discrete group in the gauge group which leads to theories with a vanishing one-loop beta-function. We conjecture that these give rise to (generically non-supersymmetric) conformal theories. The gauge group is where denote the dimension of the irreducible representations of the corresponding discrete group; there is also bifundamental matter, dictated by associated quiver diagrams. The interactions can also be read off from the quiver diagram. For SU(3) and SU(2) subgroups this leads to superconformal theories with \CN=1 and \CN=2 respectively. In the \CN=1 case we prove the vanishing of the beta functions to two loops.Note:
- 13 pages, uses harvmac.tex. Substantial additions made: proof of the vanishing of the 2-loop beta-functions for the N=1 models; discussion of the moduli space of couplings; discussion of S-duality for nonsupersymmetric theories; and added references
- 11.15.-q
- 11.25.-w
- 11.30.Pb
- 11.30.Ly
- D-branes
- Orbifolds
- 4d conformal theories
- gauge field theory: SU(N)
- supersymmetry
- R parity
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