One-Loop Tachyon Amplitude in Unoriented Open-Closed String Field Theory

Details One-Loop Tachyon Amplitude in Unoriented Open-Closed String Field Theory One-Loop Tachyon Amplitude in Unoriented Open-Closed String Field Theory

1999-05-06

arxiv.org/abs/hep-th/9905043v4

Prog.Theor.Phys. 102 (1999) 427-466

Physics

High Energy Physics

High Energy Physics - Theory

40 pages, 17 eps figures, LaTeX with PTPTeX.sty, style file replaced once again!

Scientific paper

10.1143/PTP.102.427

We calculate one-loop 2-point tachyon amplitudes in unoriented open-closed string field theory, and determine all the coupling constants of the interaction vertices in the theory. It is shown that the planar, nonplanar and nonorientable amplitudes are all reproduced correctly, and nontrivial consistencies between the determined coupling constants are observed. The necessity for the gauge group to be SO(2^{13}=8192) is also reconfirmed.

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