{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:2SGZOS6QMGXBAUW2YIZQQ2DGSB","short_pith_number":"pith:2SGZOS6Q","schema_version":"1.0","canonical_sha256":"d48d974bd061ae1052dac233086866907f10ac28cfba5ae120395af1aedc7a1a","source":{"kind":"arxiv","id":"1803.03658","version":2},"attestation_state":"computed","paper":{"title":"NNLO QCD corrections to the polarized top quark decay $t(\\uparrow) \\to X_b+W^+$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"A. Czarnecki, J.G. K\\\"orner, J.H. Piclum, S. Groote","submitted_at":"2018-03-09T19:09:13Z","abstract_excerpt":"We compute the next-to-next-to-leading order (NNLO) QCD corrections to the decay $t(\\uparrow) \\to X_b +W^+$ of a polarized top quark. The spin-momentum correlation in this quasi two-body decay is described by the polar angle distribution $\\mathrm{d}\\Gamma/\\mathrm{d}\\cos\\theta_P=\\frac{\\Gamma}{2}(1+P_t\\, \\alpha_P\\, \\cos\\theta_P)$ where $P_t$ is the polarization of the top quark and $\\alpha_P$ denotes the asymmetry parameter of the decay. For the latter we find $\\alpha^{\\mathrm{NNLO}}_P=0.3792\\pm 0.0037$."},"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":"1803.03658","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-03-09T19:09:13Z","cross_cats_sorted":[],"title_canon_sha256":"2dbb675ca6a9e968cdffaa7a27d4d17052bc2f3308fb21697b46885a021714ee","abstract_canon_sha256":"9129b98cb8a05eb5c9c3e205e8cb1a2fa8b55b9ce3c88e6ae86f68fb0209f401"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:15:55.248555Z","signature_b64":"0Nu9cLkfsguShdrQS6+dem6esrPVYArt1n88+yruAc+4eB35/kooloU4hT6JL+bcWl+g+J76B1uSLRuthBUlAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d48d974bd061ae1052dac233086866907f10ac28cfba5ae120395af1aedc7a1a","last_reissued_at":"2026-05-18T00:15:55.247832Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:15:55.247832Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"NNLO QCD corrections to the polarized top quark decay $t(\\uparrow) \\to X_b+W^+$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"A. Czarnecki, J.G. K\\\"orner, J.H. Piclum, S. Groote","submitted_at":"2018-03-09T19:09:13Z","abstract_excerpt":"We compute the next-to-next-to-leading order (NNLO) QCD corrections to the decay $t(\\uparrow) \\to X_b +W^+$ of a polarized top quark. The spin-momentum correlation in this quasi two-body decay is described by the polar angle distribution $\\mathrm{d}\\Gamma/\\mathrm{d}\\cos\\theta_P=\\frac{\\Gamma}{2}(1+P_t\\, \\alpha_P\\, \\cos\\theta_P)$ where $P_t$ is the polarization of the top quark and $\\alpha_P$ denotes the asymmetry parameter of the decay. 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