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Measurement of time-dependent $$CP$$ violation in $$B^0 to K^0_S pi^0 pi^0$$ decays

Yusa, Yosuke*; Tanida, Kiyoshi   ; Belle Collaboration*; 159 of others*

We report a measurement of time-dependent $$CP$$ violation in $$B^0 to K^0_S pi^0 pi^0$$ decays using a data sample of $$772 times 10^6$$ $$Bbar{B}$$ pairs collected by the Belle experiment running at the $$Upsilon (4S)$$ resonance at the KEKB $$e^+ e^-$$ collider. This decay proceeds mainly via a $$bto sdbar{d}$$ "penguin" amplitude. The results are $$sin 2phi^{rm eff}_1 = 0.92^{+0.27}_{-0.31}~$$ (stat.) $$pm 0.11$$ (syst.) and $$mathcal{A} = 0.28 pm 0.21$$ (stat.) $$pm 0.04$$ (syst.), which are the most precise measurements of $$CP$$ violation in this decay mode to date. The value for the $$CP$$-violating parameter $$sin 2phi^{rm eff}_1$$ is consistent with that obtained using decay modes proceeding via a $$bto cbar{c}s$$ "tree" amplitude.

Language

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English

Journal

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Physical Review D

Volume

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99

Number

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1

Pages

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p.011102_1 - 011102_7

Publication Year/Month

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2019/01

Meeting title

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Held date

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Location (city)

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Location (country)

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Patent information

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PDF

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AA2019-0530.pdf:0.33MB

Paper URL

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https://doi.org/10.1103/PhysRevD.99.011102

DOI for research data

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Keywords

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CP対称性の破れ

Research Facility

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Press Release

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Article of JAEA R&D Review

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Cooperating Institute

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高エネルギー加速器研究機構

Accesses

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- Accesses

InCites™

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Percentile:13.7

Category:Astronomy & Astrophysics

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