{"paper":{"title":"$0\\nu\\beta\\beta$ and $2\\nu\\beta\\beta$ nuclear matrix elements in the interacting boson model with isospin restoration","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-th","authors_text":"F. Iachello, J. Barea, J. Kotila","submitted_at":"2015-06-29T07:52:06Z","abstract_excerpt":"We introduce a method for isospin restoration in the calculation of nuclear matrix elements (NME) for $0\\nu\\beta\\beta$ and $2\\nu\\beta\\beta$ decay within the framework of interacting boson model (IBM-2). With this method, we calculate NME for all processes of interest in $0\\nu\\beta^-\\beta^-$, $2\\nu\\beta^-\\beta^-$, and in $0\\nu\\beta^+\\beta^+$, $0\\nu\\beta^+ EC^+$, $R0\\nu ECEC$, $2\\nu\\beta^+\\beta^+$, $2\\nu\\beta^+EC$, and $2\\nu ECEC$. With this method, the Fermi (F) matrix elements for $2\\nu\\beta\\beta$ vanish, and those for $0\\nu\\beta\\beta$ are considerably reduced."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.08530","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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"}