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A note on the stability of axionic D-term strings

Ana Achucarro·Kepa Sousa
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Abstract

We investigate the stability of a new class of BPS cosmic strings in N=1 supergravity with D-terms recently proposed by Blanco-Pillado, Dvali and Redi. These have been conjectured to be the low energy manifestation of D-strings that might form from tachyon condensation after D- anti-D-brane annihilation in type IIB superstring theory. There are three one-parameter families of cylindrically symmetric one-vortex solutions to the BPS equations (tachyonic, axionic and hybrid). We find evidence that the zero mode in the axionic case, or s-strings, can be excited. Its evolution leads to the decompactification of four-dimensional spacetime at late times, with a rate that decreases with decreasing brane tension.

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Ana Achucarro, Kepa Sousa. 2006-01-20. A note on the stability of axionic D-term strings. https://doi.org/10.1103/physrevd.74.081701

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