Two-Loop String Theory on Null Compactifications

Details Two-Loop String Theory on Null Compactifications Two-Loop String Theory on Null Compactifications

2006-01-30

arxiv.org/abs/hep-th/0601220v1

Nucl.Phys.B741:313-352,2006

Physics

High Energy Physics

High Energy Physics - Theory

41 pages, 1 figure

Scientific paper

10.1016/j.nuclphysb.2006.02.028

We compute the two-loop contributions to the free energy in the null compactification of perturbative string theory at finite temperature. The cases of bosonic, Type II and heterotic strings are all treated. The calculation exploits an explicit reductive parametrization of the moduli space of infinite-momentum frame string worldsheets in terms of branched cover instantons. Various arithmetic and physical properties of the instanton sums are described. Applications to symmetric product orbifold conformal field theories and to the matrix string theory conjecture are also briefly discussed.

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