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Resummation effects amount to about 8 % of the next-to-leading order result at Tevatron and about 3 % at LHC with 7 TeV centre-of-mass energy. They lead to a significant reduction of the theoretical uncertainty. With m_t=173.3 GeV, we find sigma_ttbar=7.22^{+0.31+0.71}_{-0.47-0.55} pb at Tevatron and sigma_ttbar=162.6^{+7.4+15.4}_"},"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":"1112.4606","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2011-12-20T08:52:47Z","cross_cats_sorted":[],"title_canon_sha256":"272dfa993697ddec967bd2df4cec15d5039d717899e6bceaff91a0d40ea3ed3d","abstract_canon_sha256":"670cdcbaa2d5a36eb2ca53b50b1dbdc2cd570a9a5fb63d3797ad6a4b972a47c6"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:05:58.421848Z","signature_b64":"vhDErswFCRdlW0wmz2nwHN11FvHmmz8IoayvUt4l3m7N+82uIcHd/lnixwj0nsUe5DJwpqHnUNo+4fVKwQNaAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9bb88814d787eb112296adbdf15a2cf93605858ab24d8f9e48e7666349d15948","last_reissued_at":"2026-05-18T04:05:58.421288Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:05:58.421288Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The top-quark pair production cross section at next-to-next-to-leading logarithmic order","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"C. 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