First observation of CP violation in B¯0 → D(*)CP h0 decays by a combined time-dependent analysis of BaBar And Belle Data

Abdesselam, A.

doi:10.1103/PhysRevLett.115.121604

First observation of CP violation in B¯⁰ → D^(*)_CP h⁰ decays by a combined time-dependent analysis of BaBar And Belle Data

Journal Article · Wed Sep 16 04:00:00 EDT 2015 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.115.121604· OSTI ID:1209149

Abdesselam, A. ^[1]

Univ. of Tabuk, Tabuk (Kingdom of Saudi Arabia). et al.

We report a measurement of the time-dependent CP asymmetry of B¯⁰ → D^(*)_CPh⁰ 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^–, K⁰_Sπ⁰, or K⁰_Sω. 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). These results correspond to the first observation of CP violation in B¯⁰ → D^(*)_CPh⁰ decays. As a result, the hypothesis of no mixing-induced CP violation is excluded in these decays at the level of 5.4 standard deviations.

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Research Organization:: SLAC National Accelerator Lab., Menlo Park, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

DOE Contract Number:: AC02-76SF00515

OSTI ID:: 1209149

Report Number(s):: SLAC-PUB--16321; arXiv:1505.04147

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 12 Vol. 115; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

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CP violation in the B system Gershon, T.; Gligorov, V. V. Reports on Progress in Physics, Vol. 80, Issue 4 https://doi.org/10.1088/1361-6633/aa5514	journal	February 2017
First Evidence for cos 2 β > 0 and Resolution of the Cabibbo-Kobayashi-Maskawa Quark-Mixing Unitarity Triangle Ambiguity Adachi, I.; Adye, T.; Ahmed, H. Physical Review Letters, Vol. 121, Issue 26 https://doi.org/10.1103/physrevlett.121.261801	journal	December 2018
Averages of b-hadron, c-hadron, and $$\tau $$ τ -lepton properties as of summer 2016 Amhis, Y.; Banerjee, Sw.; Ben-Haim, E. The European Physical Journal C, Vol. 77, Issue 12 https://doi.org/10.1140/epjc/s10052-017-5058-4	journal	December 2017
Measurement of the CKM angle φ 1 in B 0 → D ¯ ( * ) 0 h 0 , D ¯ 0 → K S 0 π + π − decays with time-dependent binned Dalitz plot analysis Vorobyev, V.; Adachi, I.; Aihara, H. Physical Review D, Vol. 94, Issue 5 https://doi.org/10.1103/physrevd.94.052004	journal	September 2016

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