Instability of colliding metastable strings

Understand

The breaking of $U(1)_R$ symmetry plays a crucial role in modeling the breaking of supersymmetry (SUSY).

• In the models that possess both SUSY preserving and SUSY breaking vacua, tube-like cosmic strings called R-tubes, whose surfaces are constituted by domain walls interpolating a false and a true vacuum with some winding numbers, can exist.
• Their (in)stability can strongly constrain SUSY breaking models theirselves.
• In the present study, we investigate the dynamical (in)stability of two colliding metastable tube-like strings by field-theoretic simulations.