Decay Rates of Fixed Planes and Closed-string Tachyons on Unstable Orbifolds

Abstract

We consider closed-string tachyon condensation in the twisted sectors on the C/Z_{2n+1} \times R^{7,1} orbifold. We calculate the localized energy density in the fixed plane on the orbifold at the one-loop level, and we obtain the decay rate per unit volume of the fixed plane to leading order. We show that the decay rate increases monotonically as a function of n.

arXiv comment19 pages, 2 figures, LaTeX. v2: typos corrected. v3: section 5 is modified, main results unchanged. v4: published version in Prog. Theor. Phys