The torus one-point diagram in two-dimensional string cosmology
Journal of High Energy Physics(2023)
摘要
We calculate numerically the torus one-point string diagram in the two-dimensional string cosmology background by decomposing the one-point functions in c = 1 and c = 25 Liouville CFT into torus one-point Virasoro conformal blocks and integrating over the fundamental domain of the torus moduli space. We find a remarkably simple result as a function of the outgoing closed string energy. This torus one-point diagram is expected to contribute to the one-point cosmological wavefunction at order g s , and to the four-point cosmological wavefunction at order g_s^2 through the disconnected product of the torus one-point diagram and the sphere three-point diagram.
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关键词
Bosonic Strings,Cosmological models,Conformal Field Models in String Theory,2D Gravity
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