{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"08a9e86c4f669144549addf80ee9394225c5abd9bb163dcd44817108caadd612","created":"2026-10-03T07:18:07Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011","bbe8d97ea817eaaa690cc2570dda16cc32c1e41c3503957a678054bd299643a3"],"salt":"dc6383f74339b8b7af86ba69b02c02081377f7888beba57a624d9ddcfa3b1567","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"value","assisted_by":[],"external_id":"nuc.emc-src.tagged-dis-virtuality","kind":"well-posed","literature_status":"open","n":"1","parents":[{"note":"","parent_revision":"bbe8d97ea817eaaa690cc2570dda16cc32c1e41c3503957a678054bd299643a3","relation":"special_case"}],"plain":"By detecting the partner nucleon that recoils backward, experiments can select collisions on a nucleon that was moving fast inside deuterium. This tests directly whether fast-moving bound nucleons have modified quark distributions.","posed_since":"","precise":"Measure the struck-nucleon structure function in $d(e, e' N_s) X$ as a function of x' and spectator momentum $p_s$ from $0.25\\text{ to }0.6\\ \\mathrm{GeV}/c$ (JLab BAND and LAD experiments), and determine whether $F2_{\\mathrm{bound}}/F2_{\\mathrm{free}}$ scales with the virtuality $v = (p^\\mu p_\\mu - M^2)/M^2$ as SRC models predict. Answer: the measured function $F2_{\\mathrm{bound}}/F2_{\\mathrm{free}}(x', v)$.","problem_ref":null,"references":"","settled_by":"Spectator-tagged DIS with final-state interactions constrained by the measured angular dependence of the spectator nucleon.","status_note":"","title":"Structure function of a bound nucleon versus its virtuality","topic_ref":"7a074c9c279467b77e19375da4dad17647254ffcdf3c39de667bd47e1e1c500e"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"c219475b2ed38ac576b5a1be46e0fdd68be97e82673c4482e63df5dc7870e2a0","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"c64085efcf29da9e49ac6e85ae4676628bb81c0f8fdc91e1b0d942e29bcb1f7f","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"hLLieyuGRRR94ij0BGgCmRTcWi83qf0DlTR17yqjBMafBg4-kNFdTPi5j-D4kj-cEErv9q_muPNMmKNAVwhDCw"},"schema":"pubphys.envelope/1"},"record_hash":"c219475b2ed38ac576b5a1be46e0fdd68be97e82673c4482e63df5dc7870e2a0","leaf_index":1744}