E-strings and N = 4 topological Yang-Mills theories
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Author
Minahan, J. A.
Nemeschansky, D.
Vafa, C.
Warner, N. P.
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https://doi.org/10.1016/S0550-3213(98)00426-XMetadata
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Minahan, J.A., D. Nemeschansky, C. Vafa, and N.P. Warner. 1998. “E-Strings and N = 4 Topological Yang-Mills Theories.” Nuclear Physics B 527 (3): 581–623. https://doi.org/10.1016/s0550-3213(98)00426-x.Abstract
We study certain properties of six-dimensional tensionless E-strings (arising from zero size E-8 instantons). In particular we show that n E-strings form a bound string which carries an E-8 level-n current algebra as well as a left-over conformal system with c = 12n - 4 - (248n/n + 30), whose characters can be computed. Moreover we show that the characters of the n-string bound state are captured by N = 4 U(n) topological Yang-Mills theory on 1/2K3. This relation not only illuminates certain aspects of E-strings but can also be used to shed light on the properties of N = 4 topological Yang-Mills theories on manifolds with b(2)(+) = 1. In particular the E-string partition functions, which can be computed using local mirror symmetry on a Calabi-Yau threefold, give the Euler characteristics of the Yang-Mills instanton moduli space on 1/2K3. Moreover, the partition functions are determined by a gap condition combined with a simple recurrence relation which has its origins in a holomorphic anomaly that has been conjectured to exist for N = 4 topological Yang-Mills on manifolds with b(2)(+) = 1 and is also related to the holomorphic anomaly for higher genus topological strings on Calabi-Yau threefolds.Terms of Use
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