{"paper":{"title":"Quasi-two-body decays $B_{(s)}\\to P f_2(1270)\\to P\\pi\\pi$ in the perturbative QCD approach","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"Ai-Jun Ma, Wen-Fei Wang, Ya Li, Zhen-jun Xiao, Zhou Rui","submitted_at":"2018-07-07T10:07:21Z","abstract_excerpt":"In this work, we calculate the $CP$-averaged branching ratios and direct $CP$-violating asymmetries of the quasi-two-body decays $B_{(s)}\\to P f_2(1270)\\to P\\pi\\pi$ with the two-pion distribution amplitude $\\Phi_{\\pi\\pi}^{\\rm D}$ by using the perturbative QCD factorization approach, where $P$ represents a light pseudoscalar meson $K, \\pi, \\eta$ and $\\eta^{\\prime}$. The relativistic Breit-Wigner formula for the $D$-wave resonance $f_2(1270)$ is adopted to parameterize the timelike form factor $F_{\\pi}$, which contains the final state interactions between the pions in the resonant regions. The c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.02641","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":""},"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"}