{"paper":{"title":"NNLO unquenched calculation of the b quark mass","license":"","headline":"","cross_cats":["hep-ph"],"primary_cat":"hep-lat","authors_text":"F. Rapuano, G. Martinelli, L. Giusti, V. Gimenez","submitted_at":"1999-09-21T18:26:07Z","abstract_excerpt":"By combining the first unquenched lattice computation of the B-meson binding energy with the recently calculated two-loop contribution to the lattice HQET mass, we determine the $\\bar{MS}$ b-quark mass, $\\bar{m}_{b}(\\bar{m}_{b})$ at the NNLO. We find $\\bar{m}_{b}(\\bar{m}_{b}) = (4.26\\pm 0.03 \\pm 0.04 \\pm 0.05) {\\rm GeV}$. The inclusion of the two-loop effects is one of the steps necessary to extract $\\bar{m}_{b}(\\bar{m}_{b})$ with a precision better than ${\\cal O}(\\Lambda_{QCD})$, which is the uncertainty due to the presence of an IR renormalon singularity in the perturbative series of the res"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-lat/9909138","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"}