{ "metadata": { "title": "Measurements of Direct and Indirect CP Violation via D0 to KK and pipi Decays", "version": "1.0.0", "author": "HFLAV Collaboration", "date": "2026-03-02", "description": "Longer description to come", "schema": "1.1.0" }, "groups": [ { "name": "World averages A_CP_dir_ind", "fit": { "chi2": 11.186427747118485, "ndf": 9 }, "averages": [ { "name": "A_CP_ind world average", "latexname": "A_{CP}^{\rm ind}", "average": { "value": { "central": -9.956546160171845e-05, "uncertainty": 0.00011612610273106199 } } }, { "name": "A_CP_dir world average", "latexname": "A_{CP}^{\rm dir}", "average": { "value": { "central": -0.001587925232613954, "uncertainty": 0.00028503258285581326 } } } ], "averages_correlation": [ [ 1.0, -0.04766342235453429 ], [ -0.04766342235453429, 1.0000000000000002 ] ], "inputs": [ { "name": "Measurements for Delta A_CP", "sources": [ { "name": "CDF", "comment": "Delta A_CP", "value": { "central": -0.0062, "statistical": 0.0021, "systematic": 0.001 }, "references": { "bibtex": "CDF:2012ous", "url": "https://inspirehep.net/literature/1121873", "pub": "T. Aaltonen et al. (CDF Collab.), Phys.Rev.Lett. 109 (2012) 111801" } }, { "name": "BaBar", "comment": "Delta A_CP", "value": { "central": 0.0024, "statistical": 0.0062, "systematic": 0.0026 }, "references": { "bibtex": "BaBar:2007tfw", "url": "https://inspirehep.net/literature/761126", "pub": "B. Aubert et al. (BABAR Collab.), Phys. Rev. Lett. 100, 061803 (2008)" } }, { "name": "LHCb SL", "comment": "Delta A_CP", "value": { "central": 0.0014, "statistical": 0.0016, "systematic": 0.0008 }, "references": { "bibtex": "LHCb:2014kcb", "url": "https://inspirehep.net/literature/1295690", "pub": "R. Aaij et al. (LHCb Collab.), JHEP 1407 (2014) 041" } }, { "name": "LHCb prompt", "comment": "Delta A_CP", "value": { "central": -0.001, "statistical": 0.0008, "systematic": 0.0003 }, "references": { "bibtex": "LHCb:2016csn", "url": "https://inspirehep.net/literature/1420555", "pub": "R. Aaij et al. (LHCb Collab.), Phys.Rev.Lett. 116 (2016) 191601" } }, { "name": "LHCb SL2", "comment": "Delta A_CP", "value": { "central": -0.0009, "statistical": 0.0008, "systematic": 0.0005 }, "references": { "bibtex": "LHCb:2019hro", "url": "https://inspirehep.net/literature/1726338", "pub": "R. Aaij et al. (LHCb Collab.), Phys.Rev.Lett. 122 (2019) 21, 211803" } }, { "name": "LHCb prompt2", "comment": "Delta A_CP", "value": { "central": -0.00182, "statistical": 0.00032, "systematic": 9e-05 }, "references": { "bibtex": "LHCb:2019hro", "url": "https://inspirehep.net/literature/1726338", "pub": "R. Aaij et al. (LHCb Collab.), Phys.Rev.Lett. 122 (2019) 21, 211803" } } ] }, { "name": "Measurements for A_Gamma", "sources": [ { "name": "BaBar", "comment": "A_Gamma", "value": { "central": 0.0009, "statistical": 0.0026, "systematic": 0.0006 }, "references": { "bibtex": "BaBar:2012bho", "url": "https://inspirehep.net/literature/1186384", "pub": "J.P. Lees et al. (BABAR Collab.), Phys.Rev.D 87 (2013) 1, 012004" } }, { "name": "Belle", "comment": "A_Gamma", "value": { "central": -0.0003, "statistical": 0.002, "systematic": 0.0007 }, "references": { "bibtex": "Belle:2015etc", "url": "https://inspirehep.net/literature/1395100", "pub": "Marko Stari\u010d et al. (Belle Collab.), Phys.Lett.B 753 (2016) 412-418" } }, { "name": "CDF KK+$\\pi\\pi$", "comment": "A_Gamma", "value": { "central": -0.0012, "statistical": 0.0012, "systematic": 0.0 }, "references": { "bibtex": "CDF:2014wyb", "url": "https://inspirehep.net/literature/1323066", "pub": "T. Aaltonen et al. (CDF Collab.), Phys.Rev.D 90 (2014) 11, 111103" } }, { "name": "LHCb KK", "comment": "Delta Y(KK) combined with legacy data", "value": { "central": -3e-05, "statistical": 0.00013, "systematic": 3e-05 }, "references": { "bibtex": "LHCb:2017ejh", "url": "https://inspirehep.net/literature/1864385", "pub": "R. Aaij et al. (LHCb Collab.), Phys.Rev.D 104 (2021) 7, 072010" } }, { "name": "LHCb $\\pi\\pi$", "comment": "Delta Y(pipi) combined with legacy data", "value": { "central": -0.00036, "statistical": 0.00024, "systematic": 4e-05 }, "references": { "bibtex": "LHCb:2017ejh", "url": "https://inspirehep.net/literature/1864385", "pub": "R. Aaij et al. (LHCb Collab.), Phys.Rev.D 104 (2021) 7, 072010" } } ] } ] }, { "name": "World averages A_CP_dir_ind_KK", "fit": { "chi2": 3.937551973452053, "ndf": 3 }, "averages": [ { "name": "A_CP_ind KK world average", "latexname": "A_{CP}^{\rm ind}(KK)", "average": { "value": { "central": -1.2532640396355883e-05, "uncertainty": 0.00013440664725100605 } } }, { "name": "A_CP_dir KK world average", "latexname": "A_{CP}^{\rm dir}(KK)", "average": { "value": { "central": 0.0005385721338485824, "uncertainty": 0.0006003313497998406 } } } ], "averages_correlation": [ [ 1.0, -0.4078961461633966 ], [ -0.4078961461633966, 1.0000000000000002 ] ], "inputs": [ { "name": "Measurements for Delta A_CP", "sources": [ { "name": "BaBar", "comment": "A_CP(KK)", "value": { "central": 0.0, "statistical": 0.0034, "systematic": 0.0013 }, "references": { "bibtex": "BaBar:2007tfw", "url": "https://inspirehep.net/literature/761126", "pub": "B. Aubert et al. (BABAR Collab.), Phys. Rev. Lett. 100, 061803 (2008)." } }, { "name": "Belle", "comment": "A_CP(KK)", "value": { "central": -0.0043, "statistical": 0.003, "systematic": 0.0011 }, "references": { "bibtex": "Belle:2008ddg", "url": "https://inspirehep.net/literature/789593", "pub": "M. Stari\u010d et al. (Belle Collab.), Phys. Lett. B670 (2008) 190" } }, { "name": "LHCb prompt", "comment": "A_CP(KK)", "value": { "central": 0.00068, "statistical": 0.00054, "systematic": 0.00016 }, "references": { "bibtex": "LHCb:2022lry", "url": "https://inspirehep.net/literature/2692262", "pub": "R. Aaij et al. (LHCb Collab.), Phys. Rev. Lett. 131 (2023) 091802" } } ] }, { "name": "Measurements for A_Gamma", "sources": [ { "name": "CDF KK", "comment": "A_Gamma", "value": { "central": -0.0019, "statistical": 0.0015, "systematic": 0.0004 }, "references": { "bibtex": "CDF:2014wyb", "url": "https://inspirehep.net/literature/1323066", "pub": "T.A. Aaltonen et al. (CDF Collab.), Phys.Rev. D90 (2014) 111103" } }, { "name": "LHCb KK", "comment": "Delta Y(KK) combined with legacy data", "value": { "central": -3e-05, "statistical": 0.00013, "systematic": 3e-05 }, "references": { "bibtex": "LHCb:2017ejh", "url": "https://inspirehep.net/literature/1864385", "pub": "R. Aaij et al. (LHCb Collab.), Phys.Rev.D 104 (2021) 7, 072010" } } ] } ] } ] }