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3 research outcomes, page 1 of 1
  • publication . Preprint . Article . 2016
    Open Access English
    Authors:
    Hayato Motohashi; Claudia de Rham;
    Project: NSF | The Physics Frontier Cent... (0551142), EC | InvisiblesPlus (690575), EC | ELUSIVES (674896), NSF | Center for Cosmological P... (0114422)

    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 natural...

  • publication . Preprint . Article . 2017
    Open Access English
    Authors:
    Hayato Motohashi; Wayne Hu;
    Project: EC | ELUSIVES (674896), NSF | Center for Cosmological P... (0114422), NSF | The Physics Frontier Cent... (0551142), NSF | Programs on Critical Prob... (1066293), EC | InvisiblesPlus (690575)

    We provide a compact and unified treatment of power spectrum observables for the effective field theory (EFT) of inflation with the complete set of operators that lead to second-order equations of motion in metric perturbations in both space and time derivatives, includ...

  • publication . Article . Preprint . Other literature type . 2017
    Open Access
    Authors:
    Hayato Motohashi; Wayne Hu;
    Publisher: American Physical Society (APS)
    Project: NSF | Center for Cosmological P... (0114422), EC | InvisiblesPlus (690575), EC | ELUSIVES (674896), NSF | The Physics Frontier Cent... (0551142)

    Comment: 9 pages, 5 figures; added Fig. 2, matches published version

3 research outcomes, page 1 of 1