{"paper":{"title":"Thermal Unparticles: A New Form of Energy Density in the Universe","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph"],"primary_cat":"hep-ph","authors_text":"Shao-Long Chen, Xiao-Gang He, Xue-Peng Hu, Yi Liao","submitted_at":"2007-10-26T16:21:05Z","abstract_excerpt":"Unparticle $\\U$ with scaling dimension $d_\\U$ has peculiar thermal properties due to its unique phase space structure. We find that the equation of state parameter $\\omega_\\U$, the ratio of pressure to energy density, is given by $1/(2d_\\U +1)$ providing a new form of energy in our universe. In an expanding universe, the unparticle energy density $\\rho_\\U(T)$ evolves dramatically differently from that for photons. For $d_\\U >1$, even if $\\rho_\\U(T_D)$ at a high decoupling temperature $T_D$ is very small, it is possible to have a large relic density $\\rho_\\U(T^0_\\gamma)$ at present photon tempe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0710.5129","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0710.5129/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}