{"paper":{"title":"Spectator Scattering and Annihilation Contributions as a Solution to the ${\\pi}K$ and ${\\pi}{\\pi}$ Puzzles within QCD Factorization Approach","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Junfeng Sun, Qin Chang, Xiaonan Li, Yueling Yang","submitted_at":"2014-09-04T05:32:19Z","abstract_excerpt":"The large branching ratios for pure annihilation $\\bar{B}_s^0$ $\\to$ $\\pi^+ \\pi^-$ and $\\bar{B}_d^0$ $\\to$ $K^+ K^-$ decays reported by CDF and LHCb collaborations recently and the so-called ${\\pi}K$ and ${\\pi}{\\pi}$ puzzles indicate that spectator scattering and annihilation contributions are important to the penguin-dominated, color-suppressed tree dominated, and pure annihilation nonleptonic $B$ decays. Combining the available experimental data for $B_{u,d}$ ${\\to}$ $\\pi \\pi$, ${\\pi}K$ and $K \\bar{K}$ decays, we do a global fit on the spectator scattering and annihilation parameters $X_H({\\"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.1322","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"}