{"paper":{"title":"Gravitational Wave Decay into Dark Energy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-ph","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Filippo Vernizzi, Giovanni Tambalo, Matthew Lewandowski, Paolo Creminelli","submitted_at":"2018-09-10T17:57:09Z","abstract_excerpt":"We study the decay of gravitational waves into dark energy fluctuations $\\pi$, through the processes $\\gamma \\to \\pi\\pi$ and $\\gamma \\to \\gamma \\pi$, made possible by the spontaneous breaking of Lorentz invariance. Within the EFT of Dark Energy (or Horndeski/beyond Horndeski theories) the first process is large for the operator $\\frac12 \\tilde m_4^2(t) \\, \\delta g^{00}\\, \\left( {}^{(3)}\\! R + \\delta K_\\mu^\\nu \\delta K^\\mu_\\nu -\\delta K^2 \\right)$, so that the recent observations force $\\tilde m_4 =0$ (or equivalently $\\alpha_{\\rm H}=0$). This constraint, together with the requirement that grav"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.03484","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}