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- W1987432854 abstract "We evolve the network of global strings in the matter-dominated universe by means of numerical simulations. The existence of the scaling solution is confirmed as in the radiation-dominated universe but the scaling parameter $ensuremath{xi}$ takes a slightly smaller value, $ensuremath{xi}ensuremath{simeq}0.6ifmmodepmelsetextpmfi{}0.1,$ which is defined as $ensuremath{xi}={ensuremath{rho}}_{s}{t}^{2}/ensuremath{mu}$ with ${ensuremath{rho}}_{s}$ the energy density of global strings and $ensuremath{mu}$ the string tension per unit length. The change of $ensuremath{xi}$ from the radiation to the matter-dominated universe is consistent with that obtained by Albrecht and Turok by use of the one-scale model. We also study the loop distribution function and find that it can be well fitted with that predicted by the one-scale model, where the number density ${n}_{l}(t)$ of the loop with the length l is given by ${n}_{l}(t)=ensuremath{nu}/[{t}^{2}(l+ensuremath{kappa}{t)}^{2}]$ with $ensuremath{nu}ensuremath{sim}0.040$ and $ensuremath{kappa}ensuremath{sim}0.48.$ Thus, the evolution of the global string network in the matter-dominated universe can be well described by the one-scale model as in the radiation-dominated universe." @default.
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- W1987432854 date "2000-02-18" @default.
- W1987432854 modified "2023-10-17" @default.
- W1987432854 title "Evolution of a global string network in a matter-dominated universe" @default.
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- W1987432854 doi "https://doi.org/10.1103/physrevd.61.061301" @default.
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