{"paper":{"title":"$\\Lambda_b \\to \\Lambda^{(\\ast)}\\nu\\bar{\\nu}$ decays and the recent Belle-II $B^+\\to K^+\\nu\\bar{\\nu}$ data","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Dargi Shameer, Diganta Das, Ria Sain","submitted_at":"2025-07-02T16:24:55Z","abstract_excerpt":"The Belle-II experiment has recently reported the first measurement of $B^+ \\to K^+ \\nu\\bar{\\nu}$ decay which exceeds the Standard Model prediction by approximately 2.7$\\sigma$. The deviation may indicate the presence of new physics beyond the Standard Model in the $b\\to s\\nu\\bar{\\nu}$ sector. Under this assumption, we study the hadronic $\\Lambda_b \\to \\Lambda(\\to p\\pi)\\nu\\bar{\\nu}$ and $\\Lambda_b \\to \\Lambda^\\ast(\\to N\\!\\bar{K})\\nu\\bar{\\nu}$ decays within both the Standard Model and beyond. We work in a low energy effective field theory framework with additional light right-handed neutrinos. "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.01863","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2507.01863/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}