{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"9e57a266ec06fdd9ea39e60a52e4bea59c894be8ccc4c2861bac634ef07b4886","created":"2026-10-03T07:18:07Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"03be3f0b909157a3989a1b2d433823ba48e700aa5e4604155965be40ad6d5a28","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"value","assisted_by":[],"external_id":"nuc.neutrino-nucleus.two-body-current-strength","kind":"well-posed","literature_status":"open","n":"1","parents":[],"plain":"A neutrino can strike a correlated pair of nucleons at once instead of a single one, knocking out two particles. Different models of this two-nucleon process disagree on how often it happens by up to a factor of about two.","posed_since":"","precise":"Determine the two-particle-two-hole (2p2h) charged-current cross section from meson-exchange currents and short-range correlations on 12C, 16O and 40Ar, double-differential in muon momentum and angle for $E_{\\nu}=0.5\\ \\text{to}\\ 5\\,\\mathrm{GeV}$, to 10 percent, together with its neutrino versus antineutrino difference and its proton-proton versus neutron-proton final-state composition. Existing microscopic models (for example Nieves et al., Martini et al., SuSAv2) disagree in normalization and in the energy-transfer distribution.","problem_ref":null,"references":"","settled_by":"An ab initio or microscopic calculation of 2p2h responses consistent with electron-scattering data in the dip region and with exclusive neutrino data on two-proton final states from argon and carbon detectors.","status_note":"","title":"Size and shape of multinucleon (2p2h) neutrino cross sections","topic_ref":"b26dbf879b3c8d9dff63a9d6b76e31cb28a6d3c51cf2e1a87d88d68d65a23459"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"cacac505a4d9c6c33f73252ff1b9ecbb17f64ede52a28da84e3a98aa2762fbd9","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"8f078340393a820a0150c864483d1c1090f7208fc2e235973b9b873169bc5721","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"bgD6BryCeKwOwPIfKogtAvuLiEK_oS9XAwE55SlhtitNQ7MnelH-JUkTL8E8QH43ZuJf7Yn2DeXgQOQGltVECg"},"schema":"pubphys.envelope/1"},"record_hash":"cacac505a4d9c6c33f73252ff1b9ecbb17f64ede52a28da84e3a98aa2762fbd9","leaf_index":1776}