{"arxiv_id":"1206.2050","title":"Determining weak phases from B->J/Psi P decays","abstract":"The decay B -> J/Psi K_S remains the most important source of information for the B_d mixing phase, determined by the CKM angle beta in the standard model. When aiming at a precision appropriate for present and coming high luminosity colliders, the corresponding hadronic matrix elements are a major obstacle, as their precise calculation is still not feasible with existing methods. Flavour symmetries offer a possibility to extract them from data, however again with limited precision. In this article, we propose a framework to take subleading contributions in B_{u,d,s} -> J/Psi P decays into account, P=(pi,K,(eta_8)), using an SU(3) analysis, together with the leading corrections to the symmetry limit. This allows for a model-independent extraction of the B_d mixing phase adequate for coming high precision data, and additionally yields information on possible New Physics contributions in these modes. We find the penguin-induced correction to be small, |Delta S|<~0.01, a limit which can be improved with coming data on CP asymmetries and branching ratios. Finally, the sensitivity on the CKM angle gamma from these modes is critically examined, yielding a less optimistic picture than previously envisaged.","primary_cat":"hep-ph","cross_cats":["hep-ex"],"submitted_at":"2012-06-10T19:54:48+00:00","latest_version":2,"source":"arxiv","source_label":"arXiv","source_url":null,"has_pdf":true,"has_source":false,"verdict":"CONDITIONAL","confidence":"MODERATE","one_line_summary":"A combined SU(3) fit to B -> J/psi P branching ratios and CP asymmetries bounds the penguin-induced shift of the B_d mixing phase at |Delta S| < 0.01 and finds the CKM angle gamma poorly constrained by these modes.","novelty_score":5.0,"correctness_risk":"medium","formal_verification":"none","upvotes":0,"downvotes":0,"pith_score":0.0,"inbound_count":7,"_links":{"html":"https://pith.science/paper/1206.2050","verdict":"/api/v1/verdicts/1206.2050"}}