Moving Stable Solitons in Galileon Theory
arXiv:1201.3132 · doi:10.1016/j.physletb.2012.07.019
Abstract
Despite the no-go theorem [5] which rules out static stable solitons in Galileon theory, we propose a family of solitons that evade the theorem by traveling at the speed of light. These domain-wall-like solitons are stable under small fluctuations-analysis of perturbation shows neither ghost-like nor tachyon-like instabilities, and perturbative collision of these solitons suggests that they pass through each other asymptotically, which maybe an indication of the integrability of the theory itself.
10 pages, 5 figures, references added, minor corrections
References in corpus (6)
Cited by in corpus (9)
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