We report a measurement of the time-dependent CP asymmetry of B¯0 → D$$^{(*)}_{CP}$$h0 decays, where the light neutral hadron h0 is a π0, η, or ω meson, and the neutral D meson is reconstructed in the CP eigenstates K+K–, K$$^{0}_{S}$$π0, or K$$^{0}_{S}$$ω. The measurement is performed combining the final data samples collected at the Υ(4S) resonance by the BABAR and Belle experiments at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. The data samples contain (471 ± 3) × 106 BB¯ pairs recorded by the BABAR detector and (772 ± 11) × 106 BB¯ pairs recorded by the Belle detector. We measure the CP asymmetry parameters –ηfS = +0.66 ± 0.10(stat) ± 0.06(syst) and C = –0.02 ± 0.07(stat) ± 0.03(syst). Here, these results correspond to the first observation of CP violation in B¯0 → D$$^{(*)}_{CP}$$h0 decays. The hypothesis of no mixing-induced CP violation is excluded in these decays at the level of 5.4 standard deviations.
Abdesselam, A., et al. "First Observation of <math display='inline'><mi>C</mi><mi>P</mi></math> Violation in <math display='inline'><mrow><msup><mrow><mover accent='true'><mrow><mi>B</mi></mrow><mrow><mo stretchy='false'>¯</mo></mrow></mover></mrow><mrow><mn>0</mn></mrow></msup><mo stretchy='false'>→</mo><msubsup><mrow><mi>D</mi></mrow><mrow><mi>C</mi><mi>P</mi></mrow><mrow><mo stretchy='false'>(</mo><mo>*</mo><mo stretchy='false'>)</mo></mrow></msubsup><msup><mrow><mi>h</mi></mrow><mrow><mn>0</mn></mrow></msup></mrow></math> Decays by a Combined Time-Dependent Analysis of <i>BABAR</i> and Belle Data." Physical Review Letters, vol. 115, no. 12, Sep. 2015. https://doi.org/10.1103/PhysRevLett.115.121604
Abdesselam, A., Adachi, I., Adametz, A., Adye, T., Ahmed, H., Aihara, H., Akar, S., Alam, M. S., Albert, J., Al Said, S., Andreassen, R., Angelini, C., Anulli, F., Arinstein, K., Arnaud, N., Asner, D. M., Aston, D., Aulchenko, V., ... Zupanc, A. (2015). First Observation of <math display='inline'><mi>C</mi><mi>P</mi></math> Violation in <math display='inline'><mrow><msup><mrow><mover accent='true'><mrow><mi>B</mi></mrow><mrow><mo stretchy='false'>¯</mo></mrow></mover></mrow><mrow><mn>0</mn></mrow></msup><mo stretchy='false'>→</mo><msubsup><mrow><mi>D</mi></mrow><mrow><mi>C</mi><mi>P</mi></mrow><mrow><mo stretchy='false'>(</mo><mo>*</mo><mo stretchy='false'>)</mo></mrow></msubsup><msup><mrow><mi>h</mi></mrow><mrow><mn>0</mn></mrow></msup></mrow></math> Decays by a Combined Time-Dependent Analysis of <i>BABAR</i> and Belle Data. Physical Review Letters, 115(12). https://doi.org/10.1103/PhysRevLett.115.121604
Abdesselam, A., Adachi, I., Adametz, A., et al., "First Observation of <math display='inline'><mi>C</mi><mi>P</mi></math> Violation in <math display='inline'><mrow><msup><mrow><mover accent='true'><mrow><mi>B</mi></mrow><mrow><mo stretchy='false'>¯</mo></mrow></mover></mrow><mrow><mn>0</mn></mrow></msup><mo stretchy='false'>→</mo><msubsup><mrow><mi>D</mi></mrow><mrow><mi>C</mi><mi>P</mi></mrow><mrow><mo stretchy='false'>(</mo><mo>*</mo><mo stretchy='false'>)</mo></mrow></msubsup><msup><mrow><mi>h</mi></mrow><mrow><mn>0</mn></mrow></msup></mrow></math> Decays by a Combined Time-Dependent Analysis of <i>BABAR</i> and Belle Data," Physical Review Letters 115, no. 12 (2015), https://doi.org/10.1103/PhysRevLett.115.121604
@article{osti_1594419,
author = {Abdesselam, A. and Adachi, I. and Adametz, A. and Adye, T. and Ahmed, H. and Aihara, H. and Akar, S. and Alam, M. S. and Albert, J. and Al Said, S. and others},
title = {First Observation of <math display='inline'><mi>C</mi><mi>P</mi></math> Violation in <math display='inline'><mrow><msup><mrow><mover accent='true'><mrow><mi>B</mi></mrow><mrow><mo stretchy='false'>¯</mo></mrow></mover></mrow><mrow><mn>0</mn></mrow></msup><mo stretchy='false'>→</mo><msubsup><mrow><mi>D</mi></mrow><mrow><mi>C</mi><mi>P</mi></mrow><mrow><mo stretchy='false'>(</mo><mo>*</mo><mo stretchy='false'>)</mo></mrow></msubsup><msup><mrow><mi>h</mi></mrow><mrow><mn>0</mn></mrow></msup></mrow></math> Decays by a Combined Time-Dependent Analysis of <i>BABAR</i> and Belle Data},
annote = {We report a measurement of the time-dependent CP asymmetry of B¯0 → D$^{(*)}_{CP}$h0 decays, where the light neutral hadron h0 is a π0, η, or ω meson, and the neutral D meson is reconstructed in the CP eigenstates K+K–, K$^{0}_{S}$π0, or K$^{0}_{S}$ω. The measurement is performed combining the final data samples collected at the Υ(4S) resonance by the BABAR and Belle experiments at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. The data samples contain (471 ± 3) × 106 BB¯ pairs recorded by the BABAR detector and (772 ± 11) × 106 BB¯ pairs recorded by the Belle detector. We measure the CP asymmetry parameters –ηfS = +0.66 ± 0.10(stat) ± 0.06(syst) and C = –0.02 ± 0.07(stat) ± 0.03(syst). Here, these results correspond to the first observation of CP violation in B¯0 → D$^{(*)}_{CP}$h0 decays. The hypothesis of no mixing-induced CP violation is excluded in these decays at the level of 5.4 standard deviations.},
doi = {10.1103/PhysRevLett.115.121604},
url = {https://www.osti.gov/biblio/1594419},
journal = {Physical Review Letters},
issn = {ISSN PRLTAO},
number = {12},
volume = {115},
place = {United States},
publisher = {American Physical Society (APS)},
year = {2015},
month = {09}}
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