Retrieving "Type I String" from the archives

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1. Cosmic String

   Linked via "Type-I strings"

   The tension/}, $T$, of a cosmic string is directly related to the energy scale $M$ of the [phase transition](/entries/phase-transition/}:
   $$T \approx \mu c^2 \approx \alpha M^2$$
   where $\mu$ is the mass per unit length possessing a long-range dipole moment based on the local vacuum [polarization](/entries/polarization-(phys…