{"paper":{"title":"MICROSCOPE limits on the strength of a new force, with comparisons to gravity and electromagnetism","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"hep-ph","authors_text":"Pierre Fayet","submitted_at":"2018-09-13T14:40:54Z","abstract_excerpt":"Extremely weak new forces could lead to apparent violations of the Equivalence Principle. The MICROSCOPE experiment implies that the relative strength of a new long-range force, compared with gravity, is constrained to $|\\bar\\alpha_g|<3.2\\ 10^{-11},2.3\\ 10^{-13},2.2\\ 10^{-13},6.7\\ 10^{-13}$ and $1.5\\ 10^{-12}$ at $2\\sigma$, for a coupling to $B,\\ L,\\ B-L,\\ B+L$ or $3B+L$; or, for a coupling to isospin, $|\\alpha_g|<8.4\\ 10^{-12}$. This is a gain in sensitivity $\\simeq 3$ for a coupling to $B$, to $\\approx$ 15 in the other cases, including $B-L$ as suggested by grand unification.\n  This requires"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.04991","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"}