{"paper":{"title":"Polarization of $\\Lambda$ and $\\overline{\\Lambda}$ hyperons along the beam direction in Pb-Pb collisions at $\\sqrt{s_{\\rm NN}}$ = 5.02 TeV","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"nucl-ex","authors_text":"ALICE Collaboration","submitted_at":"2021-07-23T12:46:23Z","abstract_excerpt":"The polarization of the $\\Lambda$ and $\\overline\\Lambda$ hyperons along the beam ($z$) direction, $P_{\\rm z}$, has been measured in Pb-Pb collisions at $\\sqrt{s_{\\rm NN}}$ = 5.02TeV recorded with ALICE at the Large Hadron Collider (LHC). The main contribution to $P_{\\rm z}$ comes from elliptic flow induced vorticity and can be characterized by the second Fourier sine coefficient $P_{\\rm z,s2} = \\langle P_{\\rm z} \\sin(2\\varphi - 2 \\Psi_{\\rm 2}) \\rangle$, where $\\varphi$ is the hyperon azimuthal emission angle, and $\\Psi_{\\rm 2}$ is the elliptic flow plane angle. We report the measurement of $P_"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.11183","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2107.11183/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}