Cosmic Strings with Small Tension

Details Cosmic Strings with Small Tension Cosmic Strings with Small Tension

2009-06-15

arxiv.org/abs/0906.2587v3

Physics

High Energy Physics

High Energy Physics - Theory

17 pages in phyzzx.tex, numerous minor changes and corrections, 5 references added; v3 stability argument clarified, minor cha

Scientific paper

We describe cosmic F--term strings with exponentially small tension which are D3 branes wrapped on deformed $A_3$ singularities. We show that brane instanton effects which can be calculated after a geometric transition give rise to an exponentially small volume for the node on which the D3 branes wrap leading to a string with small tension. We generalize our description to the case of non--Abelian cosmic strings and argue that these strings are stable against monopole--anti monopole pair creation.

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