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@article{de:2017:10.1103/PhysRevD.95.064008,
author = {de, Rham C and Motohashi, H},
doi = {10.1103/PhysRevD.95.064008},
journal = {Physical Review D - Particles, Fields, Gravitation and Cosmology},
title = {Caustics for spherical waves},
url = {http://dx.doi.org/10.1103/PhysRevD.95.064008},
volume = {95},
year = {2017}
}

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TY  - JOUR
AB  - 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.
AU  - de,Rham C
AU  - Motohashi,H
DO  - 10.1103/PhysRevD.95.064008
PY  - 2017///
SN  - 1550-2368
TI  - Caustics for spherical waves
T2  - Physical Review D - Particles, Fields, Gravitation and Cosmology
UR  - http://dx.doi.org/10.1103/PhysRevD.95.064008
UR  - http://hdl.handle.net/10044/1/51625
VL  - 95
ER  -

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Claudia de Rham

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