A Note on Cosmic (p,q,r) Strings

Details A Note on Cosmic (p,q,r) Strings A Note on Cosmic (p,q,r) Strings

2006-10-05

arxiv.org/abs/hep-th/0610059v2

Phys.Rev.D75:087301,2007

Physics

High Energy Physics

High Energy Physics - Theory

4 pages; v2: references added

Scientific paper

10.1103/PhysRevD.75.087301

The spectrum of $(p,q)$ bound states of F- and D-strings has a distinctive square-root tension formula that is hoped to be a hallmark of fundamental cosmic strings. We point out that the Bogomol'nyi-Prasad-Sommerfield (BPS) bound for vortices in ${\cal N}=2$ supersymmetric Abelian-Higgs models also takes the square-root form. In contrast to string theory, the most general supersymmetric field theoretic model allows for $(p,q,r)$ strings, with three classes of strings rather than two. Unfortunately, we find that there do not exist BPS solutions except in the trivial case. The issue of whether there exist non-BPS solutions which may closely resemble the square-root form is left as an open question.

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