Wednesday, July 3, 2013

1307.0308 (Takashi Hiramatsu et al.)

Type-I cosmic string network    [PDF]

Takashi Hiramatsu, Yuuiti Sendouda, Keitaro Takahashi, Daisuke Yamauchi, Chul-Moon Yoo
We study the network of Type-I cosmic strings using the field-theoretic numerical simulations in the Abelian-Higgs model. For Type-I strings, the gauge field plays an important role, and thus we find that the correlation length of the strings is strongly dependent upon the parameter \beta, the ratio between the self-coupling constant of the scalar field and the gauge coupling constant, namely, \beta=\lambda/2e^2. In particular, if we take the cosmic expansion into account, the network becomes densest in the comoving box for a specific value of \beta for \beta<1.
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