{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"cad1258c7a4ade8965fb561eb2a5659cb3022e35a8ffe3d87006a4112c80dad4","created":"2026-10-03T07:18:05Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011","98346228f946fa34c35c0bba2e57e86bbe58ec683f6d3f7ab0b511bb4587c1bc"],"salt":"7e3b0f1585f8d6a7b829e69a781b64e07033147230a3364d788f989797f4d17a","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":[],"external_id":"hep.dama-modulation.analysis-artifact","kind":"well-posed","literature_status":"contested","n":"1","parents":[{"note":"","parent_revision":"98346228f946fa34c35c0bba2e57e86bbe58ec683f6d3f7ab0b511bb4587c1bc","relation":"special_case"}],"plain":"DAMA subtracts each year's average rate before looking for a yearly wave; if the true rate drifts slowly, this step can manufacture a wave that is not there. The question is whether this explains all or part of the signal.","posed_since":"2020","precise":"DAMA forms residuals by subtracting the annual mean rate per energy bin, cycle by cycle (roughly September to September). For a time-dependent background $B(t)$ (e.g., decaying cosmogenic or radiogenic components, or slow gain drift), this procedure induces a sawtooth residual whose fit to $A$ cos(2 pi (t - t0)/1 yr) can give a nonzero A with a phase that depends on $\\mathrm{d}B/\\mathrm{d}t$. An answer is a quantitative yes or no: whether a background evolution consistent with DAMA's published spectra and stability data reproduces the reported amplitude and phase.","problem_ref":null,"references":"","settled_by":"Analysis of DAMA's absolute, non-subtracted single-hit rate versus time per energy bin, or a full forward model of the DAMA background evolution fitted to their data.","status_note":"Buttazzo, Panci, Rossi and Strumia (JHEP 2020) showed the mechanism can produce a modulation, and COSINE-100 (Sci. Rep. 2023) showed that applying the DAMA method to COSINE-100 data induces an artificial modulation; DAMA and Messina, Nardecchia and Piacentini (JCAP 2020) dispute that it applies to DAMA data.","title":"Can DAMA's background subtraction create a spurious yearly modulation?","topic_ref":"bae30d7e0bff60d245dc8d2942ec787f5c4f8b537f39d87886f379ac68f6e220"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"dcfbb5294f3cf4fe3391ebc27b2d6b1d5f968b2e6cd83090ec46a66dbc2fec17","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"d41e74666689a0f8fe01f1d204328bc71a9c81158a9fc45f5e019d53bcca8d08","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"Oae1aF6oZZJrYjmpDtx-EXDT55V0jFHQPyc2zs6IwFPKNCQVODNbMQ0YN0V7es34huenOcfHVWlsXJO5jJAODA"},"schema":"pubphys.envelope/1"},"record_hash":"dcfbb5294f3cf4fe3391ebc27b2d6b1d5f968b2e6cd83090ec46a66dbc2fec17","leaf_index":1529}