2012年11月30日

# Cosmic R-string, R-tube and Vacuum Instability

• Minoru Eto
• ,
• ,
• ,
• Tatsuo Kobayashi
• ,
• Keisuke Ohashi
• ,
• Yutaka Ookouchi

DOI
10.1007/JHEP03(2013)159

We show that a cosmic string associated with spontaneous $U(1)_R$ symmetry<br />
breaking gives a constraint for supersymmetric model building. In some models,<br />
the string can be viewed as a tube-like domain wall with a winding number<br />
interpolating a false vacuum and a true vacuum. Such string causes<br />
inhomogeneous decay of the false vacuum to the true vacuum via rapid expansion<br />
of the radius of the tube and hence its formation would be inconsistent with<br />
the present Universe. However, we demonstrate that there exist metastable<br />
solutions which do not expand rapidly. Furthermore, when the true vacua are<br />
degenerate, the structure inside the tube becomes involved. As an example, we<br />
show a &quot;bamboo&quot;-like solution, which suggests a possibility observing an<br />
information of true vacua from outside of the tube through the shape and the<br />
tension of the tube.

リンク情報
DOI
https://doi.org/10.1007/JHEP03(2013)159
arXiv
http://arxiv.org/abs/arXiv:1211.7237
URL
http://arxiv.org/abs/1211.7237v2