The AdS3 central charge in string theory

Details The AdS3 central charge in string theory The AdS3 central charge in string theory

2011-09-09

arxiv.org/abs/1109.1923v2

Physics

High Energy Physics

High Energy Physics - Theory

8 pages

Scientific paper

We evaluate the vacuum expectation value of the central charge operator in string theory in an AdS3 vacuum. Our calculation provides a rare non-zero one-point function on a spherical worldsheet. The evaluation involves the regularization both of a worldsheet ultraviolet divergence (associated to the infinite volume of the conformal Killing group), and a space-time infrared divergence (corresponding to the infinite volume of space-time). The two divergences conspire to give a finite result, which is the classical general relativity value for the central charge, corrected in bosonic string theory by an infinite series of tree level higher derivative terms.

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