Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1995-10-25
Nucl.Phys.B463:315-368,1996
Physics
High Energy Physics
High Energy Physics - Theory
64 pages, harvmac (b), Discussion of BRST improved, typos fixed, two references added
Scientific paper
10.1016/0550-3213(95)00605-2
We clarify the role played by BPS states in the calculation of threshold corrections of D=4, N=2 heterotic string compactifications. We evaluate these corrections for some classes of compactifications and show that they are sums of logarithmic functions over the positive roots of generalized Kac-Moody algebras. Moreover, a certain limit of the formulae suggests a reformulation of heterotic string in terms of a gauge theory based on hyperbolic algebras such as $E_{10}$. We define a generalized Kac-Moody Lie superalgebra associated to the BPS states. Finally we discuss the relation of our results with string duality.
Harvey Jeffrey A.
Moore Gregory
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