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The low-energy spectrum of (2,0) theory on T^5 x R

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DOI: 10.1088/1126-6708/2008/11/028
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We consider the ADE-series of (2, 0) supersymmetric quantum theories on T^5 \times R, where the first factor is a flat spatial five-torus, and the second factor denotes time. The quantum states of such a theory \Phi are characterized by a discrete quantum number f \in H^3 (T^5, C), where the finite abelian group C is the center subgroup of the corresponding simply connected simply laced Lie group G. At energies that are low compared to the inverse size of the T^5, the spectrum consists of a set of continua of states, each of which is characterized by the value of f and some number 5r of additional continuous parameters. By exploiting the interpretation of this theory as the ultraviolet completion of maximally supersymmetric Yang-Mills theory on T^4 \times S^1 \times R with gauge group G_{adj} = G/C and coupling constant g given by the square root of the radius of the S^1 factor, one may compute the number N_f^r (\Phi) of such continua. We perform these calculations in detail for the A- and D-series. While the Yang-Mills theory formalism is manifestly invariant under the \SL_4 (Z) mapping class group of T^4, the results are actually found to be invariant under the \SL_5 (Z) mapping class group of T^5, which provides a strong consistency check.

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