Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1997-10-17
Nucl.Phys. B528 (1998) 109-132
Physics
High Energy Physics
High Energy Physics - Theory
harvmac(b) 28 pages
Scientific paper
10.1016/S0550-3213(98)00314-9
We derive modular anomaly equations from the Seiberg-Witten-Donagi curves for softly broken N=4 SU(n) gauge theories. From these equations we can derive recursion relations for the pre-potential in powers of m^2, where m is the mass of the adjoint hypermultiplet. Given the perturbative contribution of the pre-potential and the presence of ``gaps'' we can easily generate the m^2 expansion in terms of polynomials of Eisenstein series, at least for relatively low rank groups. This enables us to determine efficiently the instanton expansion up to fairly high order for these gauge groups, e. g. eighth order for SU(3). We find that after taking a derivative, the instanton expansion of the pre-potential has integer coefficients. We also postulate the form of the modular anomaly equations, the recursion relations and the form of the instanton expansions for the SO(2n) and E_n gauge groups, even though the corresponding Seiberg-Witten-Donagi curves are unknown at this time.
Minahan Joseph A.
Nemeschansky Dennis
Warner Nicholas P.
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