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An additional mass enters through quantum fluctuations: the strange quark mass (m_s). The three couplings and m_e are known with an accuracy of better than a few per mil. Despite their importance, $m_u$, $m_d$ (their average m_{ud}) and m_s are relatively poorly known: e.g. the Particle Data Group quotes them with conservative errors close to 25%. Here we determine these quantities with a "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1011.2403","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2010-11-10T15:22:39Z","cross_cats_sorted":["hep-ph","nucl-th"],"title_canon_sha256":"ffbeb62cf3420bbd70d148c5f0f7792e62ee38a277767bb8f6b939fc8666a0cd","abstract_canon_sha256":"887616513ecbaadf5659383b893e24732cc09d9df035b1dc19d249cff15cb5cf"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:19:13.285795Z","signature_b64":"mvEDZmOsE2Tn8s9vriGQVG+gsttyTVtfyV1m/5eyx9FooxJBAWG7WYlern13HPT7IUF6r8ohv5rt2pLTlVkvCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6f8553570fea8728c32e5f6732e3050c0fdf4b4497a75909589226d1a0f79e9d","last_reissued_at":"2026-05-18T04:19:13.285296Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:19:13.285296Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Lattice QCD at the physical point: light quark masses","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph","nucl-th"],"primary_cat":"hep-lat","authors_text":"C. Hoelbling, G. Vulvert, K.K. Szabo, L. Lellouch, S.D. Katz, S. Durr, S. Krieg, T. Kurth, T. Lippert, Z. Fodor","submitted_at":"2010-11-10T15:22:39Z","abstract_excerpt":"Ordinary matter is described by six fundamental parameters: three couplings (gravitational, electromagnetic and strong) and three masses: the electron's (m_e) and those of the up (m_u) and down (m_d) quarks. An additional mass enters through quantum fluctuations: the strange quark mass (m_s). The three couplings and m_e are known with an accuracy of better than a few per mil. Despite their importance, $m_u$, $m_d$ (their average m_{ud}) and m_s are relatively poorly known: e.g. the Particle Data Group quotes them with conservative errors close to 25%. 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