Twisted Tachyon Condensation in Closed String Field Theory

Details Twisted Tachyon Condensation in Closed String Field Theory Twisted Tachyon Condensation in Closed String Field Theory

2004-03-03

arxiv.org/abs/hep-th/0403051v2

JHEP 0403 (2004) 056

Physics

High Energy Physics

High Energy Physics - Theory

36 pages, 5 figures, LaTeX2e; v2: one reference added and minor cosmetic changes

Scientific paper

10.1088/1126-6708/2004/03/056

We consider twisted tachyons on C/Z_N orbifolds of bosonic closed string theory. It has been conjectured that these tachyonic instabilities correspond to decays of the orbifolds into flat space or into orbifolds with smaller deficit angles. We examine this conjecture using closed string field theory, with the string field truncated to low-level tachyons. We compute the tachyon potentials for C/Z_2 and C/Z_3 orbifolds and find critical points at depths that generate about 70% of the expected change in the deficit angle. We find that both twisted fields and untwisted modes localized near the apex of the cone acquire vacuum expectation values and contribute to the potential.

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