Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-06-25
Phys.Lett. B445 (1998) 43-51
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 LaTeX pages, 5 .eps files; submitted to Phys.Lett.B
Scientific paper
10.1016/S0370-2693(98)01466-X
We study chiral vorton production for Witten-type superconducting string models in the context of a recently developed analytic formalism. We delineate three distinct scenarios: First, a low energy regime (including the electroweak scale) where vortons can be a source of dark matter. Secondly, an intermediate energy regime where the vorton density is too high to be compatible with the standard cosmology (thereby excluding these models). Finally, a high energy regime (including the GUT scale) in which no vortons are expected to form. The vorton density is most sensitive to the order of the string-forming phase transition and relatively insensitive to the current-forming transition. For a second-order string transition, vorton production is cosmologically disastrous for the range $10^{-28}\lsim G\mu \lsim 10^{-10}$ ($10^{5} GeV \lsim T_{c} \lsim 10^{14} GeV$), while for the first-order case we can only exclude $10^{-20}\lsim G\mu \lsim 10^{-14}$ ($10^{9} GeV \lsim T_{c} \lsim 10^{12} GeV$). We provide a fitting formula which summarises our results.
Martins Carlos J. A. P.
Shellard Paul. E. S.
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