Journal of High Energy Physics (Sep 2021)
Measurement of branching fractions and search for CP violation in D 0 → π + π − η, D 0 → K + K − η, and D 0 → ϕη at Belle
- The Belle collaboration,
- L. K. Li,
- A. J. Schwartz,
- K. Kinoshita,
- I. Adachi,
- H. Aihara,
- S. Al Said,
- D. M. Asner,
- H. Atmacan,
- V. Aulchenko,
- T. Aushev,
- R. Ayad,
- V. Babu,
- S. Bahinipati,
- P. Behera,
- J. Bennett,
- M. Bessner,
- T. Bilka,
- J. Biswal,
- A. Bobrov,
- G. Bonvicini,
- A. Bozek,
- M. Bračko,
- P. Branchini,
- T. E. Browder,
- A. Budano,
- M. Campajola,
- D. Červenkov,
- M.-C. Chang,
- P. Chang,
- V. Chekelian,
- A. Chen,
- Y. Q. Chen,
- B. G. Cheon,
- K. Chilikin,
- H. E. Cho,
- K. Cho,
- S.-J. Cho,
- S.-K. Choi,
- Y. Choi,
- S. Choudhury,
- D. Cinabro,
- S. Cunliffe,
- S. Das,
- N. Dash,
- G. De Nardo,
- G. De Pietro,
- R. Dhamija,
- F. Di Capua,
- Z. Doležal,
- T. V. Dong,
- S. Eidelman,
- D. Epifanov,
- T. Ferber,
- B. G. Fulsom,
- R. Garg,
- V. Gaur,
- A. Giri,
- P. Goldenzweig,
- B. Golob,
- E. Graziani,
- T. Gu,
- Y. Guan,
- C. Hadjivasiliou,
- S. Halder,
- K. Hayasaka,
- W.-S. Hou,
- K. Inami,
- A. Ishikawa,
- M. Iwasaki,
- Y. Iwasaki,
- W. W. Jacobs,
- E.-J. Jang,
- S. Jia,
- Y. Jin,
- K. K. Joo,
- K. H. Kang,
- G. Karyan,
- C. Kiesling,
- C. H. Kim,
- D. Y. Kim,
- K.-H. Kim,
- S. H. Kim,
- Y.-K. Kim,
- P. Kodyš,
- T. Konno,
- A. Korobov,
- S. Korpar,
- E. Kovalenko,
- P. Križan,
- R. Kroeger,
- P. Krokovny,
- T. Kuhr,
- M. Kumar,
- K. Kumara,
- A. Kuzmin,
- Y.-J. Kwon,
- K. Lalwani,
- M. Laurenza,
- S. C. Lee,
- C. H. Li,
- L. Li Gioi,
- J. Libby,
- K. Lieret,
- D. Liventsev,
- M. Masuda,
- D. Matvienko,
- M. Merola,
- F. Metzner,
- K. Miyabayashi,
- R. Mizuk,
- G. B. Mohanty,
- T. Mori,
- M. Nakao,
- Z. Natkaniec,
- A. Natochii,
- L. Nayak,
- M. Nayak,
- M. Niiyama,
- N. K. Nisar,
- S. Nishida,
- K. Nishimura,
- H. Ono,
- P. Oskin,
- P. Pakhlov,
- G. Pakhlova,
- S. Pardi,
- S.-H. Park,
- A. Passeri,
- S. Paul,
- T. K. Pedlar,
- R. Pestotnik,
- L. E. Piilonen,
- T. Podobnik,
- V. Popov,
- E. Prencipe,
- M. T. Prim,
- N. Rout,
- G. Russo,
- D. Sahoo,
- Y. Sakai,
- S. Sandilya,
- A. Sangal,
- L. Santelj,
- T. Sanuki,
- V. Savinov,
- G. Schnell,
- C. Schwanda,
- Y. Seino,
- K. Senyo,
- M. Shapkin,
- C. Sharma,
- C. P. Shen,
- J.-G. Shiu,
- B. Shwartz,
- A. Sokolov,
- E. Solovieva,
- M. Starič,
- Z. S. Stottler,
- M. Sumihama,
- T. Sumiyoshi,
- M. Takizawa,
- K. Tanida,
- F. Tenchini,
- M. Uchida,
- T. Uglov,
- Y. Unno,
- K. Uno,
- S. Uno,
- S. E. Vahsen,
- R. Van Tonder,
- G. Varner,
- A. Vinokurova,
- E. Waheed,
- C. H. Wang,
- M.-Z. Wang,
- P. Wang,
- X. L. Wang,
- S. Watanuki,
- E. Won,
- B. D. Yabsley,
- W. B. Yan,
- S. B. Yang,
- H. Ye,
- J. Yelton,
- J. H. Yin,
- Y. Yusa,
- Z. P. Zhang,
- V. Zhilich,
- V. Zhukova
Affiliations
- The Belle collaboration
- L. K. Li
- University of Cincinnati
- A. J. Schwartz
- University of Cincinnati
- K. Kinoshita
- University of Cincinnati
- I. Adachi
- SOKENDAI (The Graduate University for Advanced Studies)
- H. Aihara
- Department of Physics, University of Tokyo
- S. Al Said
- Department of Physics, Faculty of Science, King Abdulaziz University
- D. M. Asner
- Brookhaven National Laboratory
- H. Atmacan
- University of Cincinnati
- V. Aulchenko
- Budker Institute of Nuclear Physics SB RAS
- T. Aushev
- National Research University Higher School of Economics
- R. Ayad
- Department of Physics, Faculty of Science, University of Tabuk
- V. Babu
- Deutsches Elektronen-Synchrotron
- S. Bahinipati
- Indian Institute of Technology Bhubaneswar
- P. Behera
- Indian Institute of Technology Madras
- J. Bennett
- University of Mississippi
- M. Bessner
- University of Hawaii
- T. Bilka
- Faculty of Mathematics and Physics, Charles University
- J. Biswal
- J. Stefan Institute
- A. Bobrov
- Budker Institute of Nuclear Physics SB RAS
- G. Bonvicini
- Wayne State University
- A. Bozek
- H. Niewodniczanski Institute of Nuclear Physics
- M. Bračko
- J. Stefan Institute
- P. Branchini
- INFN - Sezione di Roma Tre
- T. E. Browder
- University of Hawaii
- A. Budano
- INFN - Sezione di Roma Tre
- M. Campajola
- INFN - Sezione di Napoli
- D. Červenkov
- Faculty of Mathematics and Physics, Charles University
- M.-C. Chang
- Department of Physics, Fu Jen Catholic University
- P. Chang
- Department of Physics, National Taiwan University
- V. Chekelian
- Max-Planck-Institut für Physik
- A. Chen
- National Central University
- Y. Q. Chen
- Department of Modern Physics and State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China
- B. G. Cheon
- Department of Physics and Institute of Natural Sciences, Hanyang University
- K. Chilikin
- P.N. Lebedev Physical Institute of the Russian Academy of Sciences
- H. E. Cho
- Department of Physics and Institute of Natural Sciences, Hanyang University
- K. Cho
- Korea Institute of Science and Technology Information
- S.-J. Cho
- Yonsei University
- S.-K. Choi
- Gyeongsang National University
- Y. Choi
- Sungkyunkwan University
- S. Choudhury
- Indian Institute of Technology Hyderabad
- D. Cinabro
- Wayne State University
- S. Cunliffe
- Deutsches Elektronen-Synchrotron
- S. Das
- Malaviya National Institute of Technology Jaipur
- N. Dash
- Indian Institute of Technology Madras
- G. De Nardo
- INFN - Sezione di Napoli
- G. De Pietro
- INFN - Sezione di Roma Tre
- R. Dhamija
- Indian Institute of Technology Hyderabad
- F. Di Capua
- INFN - Sezione di Napoli
- Z. Doležal
- Faculty of Mathematics and Physics, Charles University
- T. V. Dong
- Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University
- S. Eidelman
- Budker Institute of Nuclear Physics SB RAS
- D. Epifanov
- Budker Institute of Nuclear Physics SB RAS
- T. Ferber
- Deutsches Elektronen-Synchrotron
- B. G. Fulsom
- Pacific Northwest National Laboratory
- R. Garg
- Panjab University
- V. Gaur
- Virginia Polytechnic Institute and State University
- A. Giri
- Indian Institute of Technology Hyderabad
- P. Goldenzweig
- Institut für Experimentelle Teilchenphysik, Karlsruher Institut für Technologie
- B. Golob
- J. Stefan Institute
- E. Graziani
- INFN - Sezione di Roma Tre
- T. Gu
- University of Pittsburgh
- Y. Guan
- University of Cincinnati
- C. Hadjivasiliou
- Pacific Northwest National Laboratory
- S. Halder
- Tata Institute of Fundamental Research
- K. Hayasaka
- Niigata University
- W.-S. Hou
- Department of Physics, National Taiwan University
- K. Inami
- Graduate School of Science, Nagoya University
- A. Ishikawa
- SOKENDAI (The Graduate University for Advanced Studies)
- M. Iwasaki
- Osaka City University
- Y. Iwasaki
- High Energy Accelerator Research Organization (KEK)
- W. W. Jacobs
- Indiana University
- E.-J. Jang
- Gyeongsang National University
- S. Jia
- Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University
- Y. Jin
- Department of Physics, University of Tokyo
- K. K. Joo
- Chonnam National University
- K. H. Kang
- Kyungpook National University
- G. Karyan
- Deutsches Elektronen-Synchrotron
- C. Kiesling
- Max-Planck-Institut für Physik
- C. H. Kim
- Department of Physics and Institute of Natural Sciences, Hanyang University
- D. Y. Kim
- Soongsil University
- K.-H. Kim
- Yonsei University
- S. H. Kim
- Seoul National University
- Y.-K. Kim
- Yonsei University
- P. Kodyš
- Faculty of Mathematics and Physics, Charles University
- T. Konno
- Kitasato University
- A. Korobov
- Budker Institute of Nuclear Physics SB RAS
- S. Korpar
- J. Stefan Institute
- E. Kovalenko
- Budker Institute of Nuclear Physics SB RAS
- P. Križan
- J. Stefan Institute
- R. Kroeger
- University of Mississippi
- P. Krokovny
- Budker Institute of Nuclear Physics SB RAS
- T. Kuhr
- Ludwig Maximilians University
- M. Kumar
- Malaviya National Institute of Technology Jaipur
- K. Kumara
- Wayne State University
- A. Kuzmin
- Budker Institute of Nuclear Physics SB RAS
- Y.-J. Kwon
- Yonsei University
- K. Lalwani
- Malaviya National Institute of Technology Jaipur
- M. Laurenza
- INFN - Sezione di Roma Tre
- S. C. Lee
- Kyungpook National University
- C. H. Li
- Liaoning Normal University
- L. Li Gioi
- Max-Planck-Institut für Physik
- J. Libby
- Indian Institute of Technology Madras
- K. Lieret
- Ludwig Maximilians University
- D. Liventsev
- High Energy Accelerator Research Organization (KEK)
- M. Masuda
- Research Center for Nuclear Physics, Osaka University
- D. Matvienko
- Budker Institute of Nuclear Physics SB RAS
- M. Merola
- INFN - Sezione di Napoli
- F. Metzner
- Institut für Experimentelle Teilchenphysik, Karlsruher Institut für Technologie
- K. Miyabayashi
- Nara Women’s University
- R. Mizuk
- National Research University Higher School of Economics
- G. B. Mohanty
- Tata Institute of Fundamental Research
- T. Mori
- Graduate School of Science, Nagoya University
- M. Nakao
- SOKENDAI (The Graduate University for Advanced Studies)
- Z. Natkaniec
- H. Niewodniczanski Institute of Nuclear Physics
- A. Natochii
- University of Hawaii
- L. Nayak
- Indian Institute of Technology Hyderabad
- M. Nayak
- School of Physics and Astronomy, Tel Aviv University
- M. Niiyama
- Kyoto Sangyo University
- N. K. Nisar
- Brookhaven National Laboratory
- S. Nishida
- SOKENDAI (The Graduate University for Advanced Studies)
- K. Nishimura
- University of Hawaii
- H. Ono
- Nippon Dental University
- P. Oskin
- P.N. Lebedev Physical Institute of the Russian Academy of Sciences
- P. Pakhlov
- P.N. Lebedev Physical Institute of the Russian Academy of Sciences
- G. Pakhlova
- National Research University Higher School of Economics
- S. Pardi
- INFN - Sezione di Napoli
- S.-H. Park
- High Energy Accelerator Research Organization (KEK)
- A. Passeri
- INFN - Sezione di Roma Tre
- S. Paul
- Max-Planck-Institut für Physik
- T. K. Pedlar
- Luther College
- R. Pestotnik
- J. Stefan Institute
- L. E. Piilonen
- Virginia Polytechnic Institute and State University
- T. Podobnik
- J. Stefan Institute
- V. Popov
- National Research University Higher School of Economics
- E. Prencipe
- Forschungszentrum Jülich
- M. T. Prim
- University of Bonn
- N. Rout
- Indian Institute of Technology Madras
- G. Russo
- Università di Napoli Federico II
- D. Sahoo
- Tata Institute of Fundamental Research
- Y. Sakai
- SOKENDAI (The Graduate University for Advanced Studies)
- S. Sandilya
- Indian Institute of Technology Hyderabad
- A. Sangal
- University of Cincinnati
- L. Santelj
- J. Stefan Institute
- T. Sanuki
- Department of Physics, Tohoku University
- V. Savinov
- University of Pittsburgh
- G. Schnell
- Department of Physics, University of the Basque Country UPV/EHU
- C. Schwanda
- Institute of High Energy Physics
- Y. Seino
- Niigata University
- K. Senyo
- Yamagata University
- M. Shapkin
- Institute for High Energy Physics
- C. Sharma
- Malaviya National Institute of Technology Jaipur
- C. P. Shen
- Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University
- J.-G. Shiu
- Department of Physics, National Taiwan University
- B. Shwartz
- Budker Institute of Nuclear Physics SB RAS
- A. Sokolov
- Institute for High Energy Physics
- E. Solovieva
- P.N. Lebedev Physical Institute of the Russian Academy of Sciences
- M. Starič
- J. Stefan Institute
- Z. S. Stottler
- Virginia Polytechnic Institute and State University
- M. Sumihama
- Gifu University
- T. Sumiyoshi
- Tokyo Metropolitan University
- M. Takizawa
- J-PARC Branch, KEK Theory Center, High Energy Accelerator Research Organization (KEK)
- K. Tanida
- Advanced Science Research Center, Japan Atomic Energy Agency
- F. Tenchini
- Deutsches Elektronen-Synchrotron
- M. Uchida
- Tokyo Institute of Technology
- T. Uglov
- National Research University Higher School of Economics
- Y. Unno
- Department of Physics and Institute of Natural Sciences, Hanyang University
- K. Uno
- Niigata University
- S. Uno
- SOKENDAI (The Graduate University for Advanced Studies)
- S. E. Vahsen
- University of Hawaii
- R. Van Tonder
- University of Bonn
- G. Varner
- University of Hawaii
- A. Vinokurova
- Budker Institute of Nuclear Physics SB RAS
- E. Waheed
- High Energy Accelerator Research Organization (KEK)
- C. H. Wang
- National United University
- M.-Z. Wang
- Department of Physics, National Taiwan University
- P. Wang
- Institute of High Energy Physics, Chinese Academy of Sciences
- X. L. Wang
- Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University
- S. Watanuki
- Université Paris-Saclay, CNRS/IN2P3, IJCLab
- E. Won
- Korea University
- B. D. Yabsley
- School of Physics, University of Sydney
- W. B. Yan
- Department of Modern Physics and State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China
- S. B. Yang
- Korea University
- H. Ye
- Deutsches Elektronen-Synchrotron
- J. Yelton
- University of Florida
- J. H. Yin
- Korea University
- Y. Yusa
- Niigata University
- Z. P. Zhang
- Department of Modern Physics and State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China
- V. Zhilich
- Budker Institute of Nuclear Physics SB RAS
- V. Zhukova
- P.N. Lebedev Physical Institute of the Russian Academy of Sciences
- DOI
- https://doi.org/10.1007/JHEP09(2021)075
- Journal volume & issue
-
Vol. 2021,
no. 9
pp. 1 – 25
Abstract
Abstract We measure the branching fractions and CP asymmetries for the singly Cabibbo-suppressed decays D 0 → π + π − η, D 0 → K + K − η, and D 0 → ϕη, using 980 fb −1 of data from the Belle experiment at the KEKB e + e − collider. We obtain B D 0 → π + π − η = 1.22 ± 0.02 stat ± 0.02 syst ± 0.03 B ref × 10 − 3 , B D 0 → K + K − η = 1.80 − 0.06 + 0.07 stat ± 0.04 syst ± 0.05 B ref × 10 − 4 , B D 0 → ϕη = 1.84 ± 0.09 stat ± 0.06 syst ± 0.05 B ref × 10 − 4 , $$ {\displaystyle \begin{array}{c}\mathcal{B}\left({D}^0\to {\pi}^{+}{\pi}^{-}\eta \right)=\left[1.22\pm 0.02\left(\mathrm{stat}\right)\pm 0.02\left(\mathrm{syst}\right)\pm 0.03\left({\mathcal{B}}_{\mathrm{ref}}\right)\right]\times {10}^{-3},\\ {}\mathcal{B}\left({D}^0\to {K}^{+}{K}^{-}\eta \right)=\left[{1.80}_{-0.06}^{+0.07}\left(\mathrm{stat}\right)\pm 0.04\left(\mathrm{syst}\right)\pm 0.05\left({\mathcal{B}}_{\mathrm{ref}}\right)\right]\times {10}^{-4},\\ {}\mathcal{B}\left({D}^0\to \phi \eta \right)=\left[1.84\pm 0.09\left(\mathrm{stat}\right)\pm 0.06\left(\mathrm{syst}\right)\pm 0.05\left({\mathcal{B}}_{\mathrm{ref}}\right)\right]\times {10}^{-4},\end{array}} $$ where the third uncertainty ( B $$ \mathcal{B} $$ ref) is from the uncertainty in the branching fraction of the reference mode D 0 → K − π + η. The color-suppressed decay D 0 → ϕη is observed for the first time, with very high significance. The results for the CP asymmetries are A CP D 0 π + π − η = 0.9 ± 1.2 stat ± 0.5 syst % , A CP D 0 → K + K − η = − 1.4 ± 3.3 stat ± 1.1 syst % , ACP D 0 → ϕη = − 1.9 ± 4.4 stat ± 0.6 syst % . $$ {\displaystyle \begin{array}{c}{A}_{CP}\left({D}^0\ {\pi}^{+}{\pi}^{-}\eta \right)=\left[0.9\pm 1.2\left(\mathrm{stat}\right)\pm 0.5\left(\mathrm{syst}\right)\right]\%,\\ {}{A}_{CP}\left({D}^0\to {K}^{+}{K}^{-}\eta \right)=\left[-1.4\pm 3.3\left(\mathrm{stat}\right)\pm 1.1\left(\mathrm{syst}\right)\right]\%,\\ {} ACP\ \left({D}^0\to \phi \eta \right)=\left[-1.9\pm 4.4\left(\mathrm{stat}\right)\pm 0.6\left(\mathrm{syst}\right)\right]\%.\end{array}} $$ The results for D 0 → π + π − η are a significant improvement over previous results. The branching fraction and A CP results for D 0 → K + K − η, and the ACP result for D 0 → ϕη, are the first such measurements. No evidence for CP violation is found in any of these decays.
Keywords