Closed String Tachyons on C/Z_N

Details Closed String Tachyons on C/Z_N Closed String Tachyons on C/Z_N

2003-09-02

arxiv.org/abs/hep-th/0309029v2

Int.J.Mod.Phys. A19 (2004) 5625-5638

Physics

High Energy Physics

High Energy Physics - Theory

19 pages, 1 figure; comments added about $N$ dependence of contact term

Scientific paper

10.1142/S0217751X04021056

We analyse the condensation of closed string tachyons on the $C/Z_N$ orbifold. We construct the potential for the tachyons upto the quartic interaction term in the large $N$ limit. In this limit there are near marginal tachyons. The quartic coupling for these tachyons is calculated by subtracting from the string theory amplitude for the tachyons, the contributions from the massless exchanges, computed from the effective field theory. We argue that higher point interaction terms are are also of the same order in 1/N as the quartic term and are necessary for existence of the minimum of the tachyon potential that is consistent with earlier analysis.

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