Cosmic Strings with Small Tension

Abstract

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.

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

References in corpus (9)

• Spacetime Instanton Corrections in 4D String Vacua - The Seesaw Mechanism for D-Brane Models
• TASI Lectures on Solitons
• On the moduli space of semilocal strings and lumps
• Universal Reconnection of Non-Abelian Cosmic Strings
• Geometric Transitions and Dynamical SUSY Breaking
• Instanton Induced Open String Superpotentials and Branes at Singularities
• Introduction to Cosmic F- and D-Strings
• On the Stability of Non-Abelian Semi-local Vortices
• P-term Inflation on D-Branes