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The disk partition function in string theory
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DOI：10.1007/JHEP08(2021)026.png)
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Abstract
En 中文
We investigate the disk partition function for the open string. This is a subtle problem because of the presence of a residual gauge group PSL(2, R) on the worldsheet even after fixing the conformal gauge. It naively has infinite volume and leads to a vanishing answer. We use different methods that all demonstrate that PSL(2, R) effectively behaves like a group with finite negative volume in the path integral, which leads to a simple prescription for the computation of the disk partition function. We apply our findings to give a simple rederivation of the D-brane tensions.
Keywords:
Bosonic Strings
Conformal Field Theory
D-branes
Gauge Symmetry
Journal
IF:
5.5
Papers:
3.9W
Citations:
13.7W