{"paper":{"title":"Constraints on cosmic opacity and beyond the standard model physics from cosmological distance measurements","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph"],"primary_cat":"astro-ph.CO","authors_text":"Anastasios Avgoustidis, Clare Burrage, Javier Redondo, Licia Verde, Raul Jimenez","submitted_at":"2010-04-12T20:11:00Z","abstract_excerpt":"We update constraints on cosmic opacity by combining recent SN Type Ia data compilation with  the latest measurements of the Hubble expansion at redshifts between 0 and 2.  The new constraint on the parameter $\\epsilon$ parametrising deviations from the luminosity-angular diameter distance relation ($d_L=d_A(1+z)^{2+\\epsilon}$), is $\\epsilon=-0.04_{-0.07}^{+0.08}$ (2-$\\sigma$).  For the redshift range between 0.2 and 0.35 this corresponds to an opacity $\\Delta\\tau<0.012$ (95% C.L.), a factor of 2 stronger than  the previous constraint. Various models of beyond the standard model physics that p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1004.2053","kind":"arxiv","version":1},"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"}