Abstract
Grand unified theories can admit cosmic stringswith fermion zero modes. Such zero modes result in thestring being current-carrying and the formation ofstable remnants, vortons. However, the string zero modes do not automatically survive subsequentphase transitions. In this case the vortons dissipate.It is possible that the dissipating cosmic vortonscreate the observed baryon asymmetry of the universe. We show that fermion zero modes are anautomatic consequence cosmic strings in supersymmetrictheories. Since supersymmetry is not observed in nature,we consider possible supersymmetry-breaking terms. Some of these terms result in the zero modesbeing destroyed. We calculate the baryon asymmetrygenerated by the consequent dissipating cosmic vortons.If the supersymmetry-breaking scale is high enough, then the dissipating cosmic vortons couldaccount for the observed baryon asymmetry.
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Davis, A.C. Cosmic Strings in Realistic Particle Physics Theories and Baryogenesis. International Journal of Theoretical Physics 38, 2867–2888 (1999). https://doi.org/10.1023/A:1026695729452
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DOI: https://doi.org/10.1023/A:1026695729452