{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.topic/1","content_sha256":"c7603283e1f2acc2df4fff9166d37c7b95b46bd6746569dfe46b9295e79e0496","created":"2026-10-03T07:17:52Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":[],"salt":"e1b5264cc2a7454e13d7dbf960bcec464f6ec50183cd29296aae3b3bf94a7221","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"topic"},"content":{"external_id":"nuc.exotic-hadrons","field":"nuc","n":"1","review_cite":"Brambilla, Eidelman, Hanhart, Nefediev, Shen, Thomas, Vairo, Yuan, The XYZ states: experimental and theoretical status and perspectives, Physics Reports, 2020","review_link":"https://arxiv.org/abs/1907.07583","review_verified":"true","summary":"Most strongly interacting particles are three quarks or a quark-antiquark pair, but QCD also allows four- and five-quark states, particles made mostly of gluons (glueballs), and quark-antiquark pairs with an excited gluon field (hybrids). Dozens of candidates have been found since 2003, and their internal structure is disputed.","title":"Exotic hadrons: multiquarks, glueballs and hybrids","topic_ref":null,"why":"Which multiquark and gluonic states exist, and how they are bound, tests confinement in QCD beyond its simplest configurations."},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"0a95c0555eb6bb05e3999da7d5dca17d55ffdaf922ee81ba9f8dcd197324eda0","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"a7d585f6c76544ab8a3645cd137c19e5ea15b96db28befe48589378a1b41ce44","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"bFeIctx-DqNVzRcDynWrJAU2YEr2Z5oDDjoE_wVb3q6b610akQlAkF6zU4jF_HWMG88VZkcIHEzIrDxf0N5DBA"},"schema":"pubphys.envelope/1"},"record_hash":"0a95c0555eb6bb05e3999da7d5dca17d55ffdaf922ee81ba9f8dcd197324eda0","leaf_index":283}