Search for CP Violation in D0 → π0 π0 Decays

Belle Collaboration

doi:10.1103/PhysRevLett.112.211601

Search for CP Violation in D⁰ → π⁰ π⁰ Decays

Belle Collaboration

School of Earth System Sciences

Tata Institute of Fundamental Research
High Energy Accelerator Research Organization, Tsukuba
University of Tabuk
The University of Tokyo
Novosibirsk State University
Pacific Northwest National Laboratory
Alikhanov Institute for Theoretical and Experimental Physics
Indian Institute of Technology Bhubaneswar
The University of Sydney
Panjab University
Indian Institute of Technology Madras
Institute for High Energy Physics
Nara Women's University
Wayne State University
H. Niewodniczanski Institute of Nuclear Physics
Jožef Stefan Institute
University of Maribor
University of Hawai'i at Mānoa
Charles University
Hanyang University
Korea Institute of Science and Technology Information
Max Planck Institute for Physics (Werner Heisenberg Institute)
Sungkyunkwan University
Technische Universität München
Moscow Engineering Physics Institute
Indian Institute of Technology Guwahati
German Electron Synchrotron
University of Ljubljana

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

Abstract

We search for CP violation in neutral charm meson decays using a data sample with an integrated luminosity of 966 fb^-1 collected with the Belle detector at the KEKB e⁺e^- asymmetric-energy collider. The asymmetry obtained in the rate of D⁰ and D¯⁰ decays to the π⁰π⁰ final state, [-0.03 ± 0.64(stat) ± 0.10(syst)]%, is consistent with no CP violation. This constitutes an order of magnitude improvement over the existing result. We also present an updated measurement of the CP asymmetry in the D⁰ → K⁰ _Sπ⁰ decay: A^CP (D⁰ → K⁰ _Sπ⁰) [-0.21 ± 0.16(stat) ± 0.07(syst)]%.

Original language	English
Article number	211601
Journal	Physical Review Letters
Volume	112
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.112.211601
State	Published - 29 May 2014

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10.1103/PhysRevLett.112.211601

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@article{773da0945c9f401aad4f26a9bf99eaf5,

title = "Search for CP Violation in D0 → π0 π0 Decays",

abstract = "We search for CP violation in neutral charm meson decays using a data sample with an integrated luminosity of 966 fb-1 collected with the Belle detector at the KEKB e+e- asymmetric-energy collider. The asymmetry obtained in the rate of D0 and D¯0 decays to the π0π0 final state, [-0.03 ± 0.64(stat) ± 0.10(syst)]\%, is consistent with no CP violation. This constitutes an order of magnitude improvement over the existing result. We also present an updated measurement of the CP asymmetry in the D0 → K0 Sπ0 decay: ACP (D0 → K0 Sπ0) [-0.21 ± 0.16(stat) ± 0.07(syst)]\%.",

author = "\{Belle Collaboration\} and Nisar, \{N. K.\} and K. Trabelsi and Mohanty, \{G. B.\} and T. Aziz and A. Abdesselam and I. Adachi and H. Aihara and K. Arinstein and Asner, \{D. M.\} and V. Aulchenko and T. Aushev and R. Ayad and S. Bahinipati and Bakich, \{A. M.\} and A. Bala and V. Bansal and P. Behera and K. Belous and V. Bhardwaj and A. Bobrov and G. Bonvicini and A. Bozek and M. Bra{\`e}ko and Browder, \{T. E.\} and D. {\'E}ervenkov and Cheon, \{B. G.\} and K. Chilikin and K. Cho and V. Chobanova and Y. Choi and D. Cinabro and J. Dalseno and M. Danilov and Z. Dole{\v z}al and Z. Dr{\'a}sal and A. Drutskoy and D. Dutta and K. Dutta and S. Eidelman and D. Epifanov and H. Farhat and Fast, \{J. E.\} and T. Ferber and V. Gaur and N. Gabyshev and S. Ganguly and A. Garmash and Goh, \{Y. M.\} and B. Golob and Kim, \{M. J.\}",

note = "Publisher Copyright: {\textcopyright} 2014 American Physical Society.",

year = "2014",

month = may,

day = "29",

doi = "10.1103/PhysRevLett.112.211601",

language = "English",

volume = "112",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "21",

}

TY - JOUR

T1 - Search for CP Violation in D0 → π0 π0 Decays

AU - Belle Collaboration

AU - Nisar, N. K.

AU - Trabelsi, K.

AU - Mohanty, G. B.

AU - Aziz, T.

AU - Abdesselam, A.

AU - Adachi, I.

AU - Aihara, H.

AU - Arinstein, K.

AU - Asner, D. M.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Ayad, R.

AU - Bahinipati, S.

AU - Bakich, A. M.

AU - Bala, A.

AU - Bansal, V.

AU - Behera, P.

AU - Belous, K.

AU - Bhardwaj, V.

AU - Bobrov, A.

AU - Bonvicini, G.

AU - Bozek, A.

AU - Braèko, M.

AU - Browder, T. E.

AU - Éervenkov, D.

AU - Cheon, B. G.

AU - Chilikin, K.

AU - Cho, K.

AU - Chobanova, V.

AU - Choi, Y.

AU - Cinabro, D.

AU - Dalseno, J.

AU - Danilov, M.

AU - Doležal, Z.

AU - Drásal, Z.

AU - Drutskoy, A.

AU - Dutta, D.

AU - Dutta, K.

AU - Eidelman, S.

AU - Epifanov, D.

AU - Farhat, H.

AU - Fast, J. E.

AU - Ferber, T.

AU - Gaur, V.

AU - Gabyshev, N.

AU - Ganguly, S.

AU - Garmash, A.

AU - Goh, Y. M.

AU - Golob, B.

AU - Kim, M. J.

PY - 2014/5/29

Y1 - 2014/5/29

N2 - We search for CP violation in neutral charm meson decays using a data sample with an integrated luminosity of 966 fb-1 collected with the Belle detector at the KEKB e+e- asymmetric-energy collider. The asymmetry obtained in the rate of D0 and D¯0 decays to the π0π0 final state, [-0.03 ± 0.64(stat) ± 0.10(syst)]%, is consistent with no CP violation. This constitutes an order of magnitude improvement over the existing result. We also present an updated measurement of the CP asymmetry in the D0 → K0 Sπ0 decay: ACP (D0 → K0 Sπ0) [-0.21 ± 0.16(stat) ± 0.07(syst)]%.

AB - We search for CP violation in neutral charm meson decays using a data sample with an integrated luminosity of 966 fb-1 collected with the Belle detector at the KEKB e+e- asymmetric-energy collider. The asymmetry obtained in the rate of D0 and D¯0 decays to the π0π0 final state, [-0.03 ± 0.64(stat) ± 0.10(syst)]%, is consistent with no CP violation. This constitutes an order of magnitude improvement over the existing result. We also present an updated measurement of the CP asymmetry in the D0 → K0 Sπ0 decay: ACP (D0 → K0 Sπ0) [-0.21 ± 0.16(stat) ± 0.07(syst)]%.

UR - https://www.scopus.com/pages/publications/84977120404

U2 - 10.1103/PhysRevLett.112.211601

DO - 10.1103/PhysRevLett.112.211601

M3 - Article

AN - SCOPUS:84977120404

SN - 0031-9007

VL - 112

JO - Physical Review Letters

JF - Physical Review Letters

IS - 21

M1 - 211601

ER -

Search for CP Violation in D⁰ → π⁰ π⁰ Decays

Abstract

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