Long Lived Large Type II Strings: decay within compactification

Details Long Lived Large Type II Strings: decay within compactification Long Lived Large Type II Strings: decay within compactification

2004-06-30

arxiv.org/abs/hep-th/0406271v1

JHEP 0407 (2004) 054

Physics

High Energy Physics

High Energy Physics - Theory

32 pages, 24 text plus appendices, 4 figures

Scientific paper

10.1088/1126-6708/2004/07/054

Motivated also by recent revival of interest about metastable string states (as cosmic strings or in accelerator physics), we study the decay, in presence of dimensional compactification, of a particular superstring state, which was proven to be remarkably long-lived in the flat uncompactified scenario. We compute the decay rate by an exact numerical evaluation of the imaginary part of the one-loop propagator. For large radii of compactification, the result tends to the fully uncompactified one (lifetime T = const M^5/g^2), as expected, the string mainly decaying by massless radiation. For small radii, the features of the decay (emitted states, initial mass dependence,....) change, depending on how the string wraps on the compact dimensions.

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