Some remarks about emission channels of non-Abelian vortices

About gravitational radiation of semi local strings with non compact internal modes

“…The gravitational and other channel radiations for non abelian vortices with compact moduli space were studied in [13]. The findings of that work show that the resulting radiation is similar to the one for abelian objects, but with a corrected loop factor.…”

“…It should be emphasized that, although the QCD vortices described above are an interesting example of topological objects with internal excitations, they posses an scale two low for generating a noticeable spectrum of gravitational waves. The results of [13] assume the presence of such type of vortices, but the symmetry breaking scale is assumed to be much larger than the one corresponding to the colour flavour locked phase. An example could be the GUT or even the Planck scale.…”

“…Such vortices may lead to a noticeable gravitational spectrum. As in [13], it will be assumed that these objects may appear in a completion of the Standard Model, at early universe stages, although the explicit form of this model will be not specified. The present work instead assumes that objects of such type may be present at early universe stages, which seems for the present authors a reasonable hypothesis, and it is aimed to analyze their gravitational spectrum.…”