Dilaton and axion bremsstrahlung from collisions of cosmic (super)strings
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We calculate dilaton and axion radiation generated in the collision of two straight initially unexcited strings and give a rough cosmological estimate of dilaton and axion densities produced via this mechanism in the early universe.
7 pages, to appear in Proceedings of the 2nd International conference On quantum theories and renormalization group in gravity and cosmology (IRGAC 2006), 11-15 Jul 2006, Barcelona, Spain
7 pages, to appear in Proceedings of the 2nd International conference On quantum theories and renormalization group in gravity and cosmology (IRGAC 2006), 11-15 Jul 2006, Barcelona, Spain