The circular loop equation of a cosmic string with time-varying tension

Details The circular loop equation of a cosmic string with time-varying tension The circular loop equation of a cosmic string with time-varying tension

2008-01-18

arxiv.org/abs/0801.2808v1

Mod.Phys.Lett.A23:3023-3030,2008

Physics

High Energy Physics

High Energy Physics - Theory

8 pages, 3 figures. accepted by Modern Physics Letters A

Scientific paper

10.1142/S0217732308026340

The equation of circular loops of cosmic string with time-dependent tension
is studied in the Minkowski spacetime and Robertson-Walker universe. We find
that, in the case where the tension depends on some power of the cosmic time,
cosmic string loops with time-varying tension should not collapse to form a
black hole if the power is lower than a critical value.

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