@Article{deRham+Motohashi2017,
author="de Rham, C.
and Motohashi, H.",
title="Caustics for spherical waves",
journal="Physical Review D",
year="2017",
publisher="Amer Physical Soc",
volume="95",
number="6",
pages="064008--13pp",
abstract="We study the development of caustics in shift-symmetric scalar field theories by focusing on simple waves with an SO(p)-symmetry in an arbitrary number of space dimensions. We show that the pure Galileon, the DBI-Galileon, and the extreme-relativistic Galileon naturally emerge as the unique set of caustic-free theories, highlighting a link between the caustic-free condition for simple SO(p)-waves and the existence of either a global Galilean symmetry or a global (extreme-) relativistic Galilean symmetry.",
optnote="WOS:000396031700006",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3032), last updated on Fri, 14 Apr 2017 23:12:59 +0000",
issn="2470-0010",
doi="10.1103/PhysRevD.95.064008",
opturl="http://arxiv.org/abs/1611.05038",
opturl="https://doi.org/10.1103/PhysRevD.95.064008",
archivePrefix="arXiv",
eprint="1611.05038",
language="English"
}