Collisions of Cosmic F- and D-strings

Details Collisions of Cosmic F- and D-strings Collisions of Cosmic F- and D-strings

2004-05-25

arxiv.org/abs/hep-th/0405229v2

JHEP 0510:013,2005

Physics

High Energy Physics

High Energy Physics - Theory

42 pages, 7 figures; v.2: added references, expanded discussion of reconnection in field theory

Scientific paper

10.1088/1126-6708/2005/10/013

Recent work suggests that fundamental and Dirichlet strings, and their (p,q) bound states, may be observed as cosmic strings. The evolution of cosmic string networks, and therefore their observational signals, depends on what happens when two strings collide. We study this in string perturbation theory for collisions between all possible pairs of strings; different cases involve sphere, disk, and annulus amplitudes. The result also depends on the details of compactification; the dependence on ratios of scales is only logarithmic, but this is still numerically important. We study a range of models and parameters, and find that in most cases these strings can be distinguished from cosmic strings that arise as gauge theory solitons.

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