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Lubicz","submitted_at":"2013-11-13T11:04:15Z","abstract_excerpt":"We present a lattice QCD calculation of the pseudoscalar decay constants $f_K$, $f_D$ and $f_{D_s}$ performed by the European Twisted Mass Collaboration with $N_f = 2 + 1 + 1$ dynamical fermions. We simulated at three different values of the lattice spacing, the smallest being approximately $0.06fm$, and with pion masses as small as $210$MeV. Our main results are: $f_{K^+}/f_{\\pi^+}=1.183(17)$, $f_{K^+}=154.4(2.1)$MeV, $f_{D_s}=242.1(8.3)$MeV, $f_D=201.9(8.0)$MeV, $f_{D_s}/f_D=1.199(25)$ and $(f_{D_s}/f_D) / (f_K/f_\\pi) = 1.005(15)$."},"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":"1311.3080","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"hep-lat","submitted_at":"2013-11-13T11:04:15Z","cross_cats_sorted":[],"title_canon_sha256":"6a5b814d81c3f900e140e733cc5252bb09afff45204f9cd4fcb2be1918c4627d","abstract_canon_sha256":"f75d63e42450bddfcfdb66b27f2defef3fe82b2a65cd9b5d3b6cf00653cc9f4c"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:41:10.245167Z","signature_b64":"B//4xTlRHFu/q6GOYTebneTpG1otQhUieJW3iKxaDOkwBD5VohGNZNgw93vC+puYXw8wbVAzzeWsX7oOTaJmBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f76962646896901e34b700fa8bed30345c1a61fc8dec63364ace2d56b94d4a05","last_reissued_at":"2026-05-18T02:41:10.244770Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:41:10.244770Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Pseudoscalar decay constants $f_K/f_\\pi$, $f_D$ and $f_{D_s}$ with $N_f = 2 + 1 + 1$ ETMC configurations","license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","headline":"","cross_cats":[],"primary_cat":"hep-lat","authors_text":"C. 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