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The cross section for p\\bar{p} -> l^+ l^- gamma + X (where the leptons l are either muons or electrons with dilepton mass  M_{ll} > 40 GeV/c^2, and where the photon has transverse energy Et_{gamma} > 7 GeV and is well separated from the leptons) is 4.6 +/- 0.2 (stat)  +/- 0.3 (syst)  +/- 0.3 (lum) pb, which is consistent with standard model expectations.  We use the photon Et distribution from Z-gamma events where"},"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":"1004.1140","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2010-04-07T17:26:04Z","cross_cats_sorted":[],"title_canon_sha256":"4b841bbe6562c3537cc3cc345d55588adab74e991cc70e484a4e6f3c25f3bd3f","abstract_canon_sha256":"72eef4122420ca527d3b0cefb468c24f0c2b50ac1cdd00adfcc468cbfb1b98aa"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:45:41.373118Z","signature_b64":"NukSu06/rVEUuqFfKnmxW6PK6G8ASRhynT8x5IvIMaLh6Z7faqJWIFoFxRAz5vPHu6VAzo7xSGQvB+QeeDs7Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"493d4d395248017e7eba24a6a8b009f5c6c9c39296f179285d86e08b76d81c95","last_reissued_at":"2026-05-18T02:45:41.372705Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:45:41.372705Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Measurement of Z gamma Production in pbar{p} Collisions at sqrt{s} = 1.96 TeV","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"CDF Collaboration, et al, T. Aaltonen","submitted_at":"2010-04-07T17:26:04Z","abstract_excerpt":"The production rate and kinematics of photons produced in association with Z bosons are studied using 2/fb of p\\bar{p} collision data collected at the Collider Detector at Fermilab.  The cross section for p\\bar{p} -> l^+ l^- gamma + X (where the leptons l are either muons or electrons with dilepton mass  M_{ll} > 40 GeV/c^2, and where the photon has transverse energy Et_{gamma} > 7 GeV and is well separated from the leptons) is 4.6 +/- 0.2 (stat)  +/- 0.3 (syst)  +/- 0.3 (lum) pb, which is consistent with standard model expectations.  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