Instability of colliding metastable strings

• Published in: The journal of high energy physics Vol. 2014; no. 1; pp. 1 - 19
• Main Authors: Hiramatsu, Takashi, Eto, Minoru, Kamada, Kohei, Kobayashi, Tatsuo, Ookouchi, Yutaka
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.01.2014; Springer Nature B.V
• Subjects: Breaking; Classical and Quantum Gravitation; Computer simulation; Domain walls; Elementary Particles; High energy physics; Instability; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Relativity Theory; Stability; String Theory; Strings; Supersymmetry; Symmetry; Global Symmetries; Solitons Monopoles and Instantons; String theory and cosmic strings
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP01(2014)165

A bstract 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. From them, we find that the strings become unstable, depending on the relative collision angle and speed of two strings, and the false vacuum is eventually filled out by the true vacuum owing to rapid expansion of the strings or unstable bubbles created as remnants of the collision.