{"arxiv_id":"hep-ph/0507290","title":"The Effect of Penguins in the B_d to J/psi K^0 CP asymmetry","abstract":"Performing a fit to the available experimental data, we quantify the effect of long-distance contributions from penguin contractions in B^0 to J/psi K^0 decays. We estimate the deviation of the measured S_CP term of the time-dependent CP asymmetry from sin(2 beta) induced by these contributions and by the penguin operators. We find Delta S = 0.000 +- 0.012 ([-0.025,0.024] @ 95% probability).","primary_cat":"hep-ph","cross_cats":[],"submitted_at":"2005-07-25T19:33:25+00:00","latest_version":3,"source":"arxiv","source_label":"arXiv","source_url":null,"has_pdf":true,"has_source":false,"verdict":"CONDITIONAL","confidence":"MODERATE","one_line_summary":"Penguin contributions shift the B0 to J/psi K0 CP asymmetry from sin 2 beta by at most about 0.02, an uncertainty an order of magnitude larger than previous estimates.","novelty_score":6.0,"correctness_risk":"medium","formal_verification":"none","upvotes":0,"downvotes":0,"pith_score":0.0,"inbound_count":16,"_links":{"html":"https://pith.science/paper/hep-ph/0507290","verdict":"/api/v1/verdicts/hep-ph/0507290"}}