{"paper":{"title":"$B\\to \\pi\\pi$ decays and effects of the next-to-leading order contributions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"Shan Cheng, Xue-Yan Liu, Ya-Lan Zhang, Ying-Ying Fan, Zhen-jun Xiao","submitted_at":"2014-05-28T02:29:33Z","abstract_excerpt":"In this paper we perform a systematic study for the three $B \\to (\\pi^+\\pi^-,\\pi^+\\pi^0,\\pi^0\\pi^0)$ decays in the perturbative QCD (pQCD) factorization approach with the inclusion of all currently known next-to-leading order (NLO) contributions from various sources. We found that (a) for the CP-averaged decay rates $Br(B^0\\to \\pi^+\\pi^-)$ and $Br(B^+\\to \\pi^+\\pi^0)$, the NLO pQCD predictions agree with the data within one standard dviation; (b) for $Br(B^0\\to \\pi^0\\pi^0)$, however, although the NLO contributions can provide a $\\sim 100\\%$ enhancement to the leading order (LO) result, it is st"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1405.7103","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"}