Measurements of the Branching Fraction, Polarization, and
CP
Asymmetry for the Decay
B0→ωω
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Published:2024-08-22
Issue:8
Volume:133
Page:
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ISSN:0031-9007
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Container-title:Physical Review Letters
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language:en
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Short-container-title:Phys. Rev. Lett.
Author:
Guan Y.ORCID, Schwartz A. J.ORCID, Kinoshita K.ORCID, Adachi I.ORCID, Aihara H.ORCID, Al Said S.ORCID, Asner D. M.ORCID, Atmacan H.ORCID, Ayad R.ORCID, Bahinipati S.ORCID, Banerjee Sw.ORCID, Belous K.ORCID, Bennett J.ORCID, Bessner M.ORCID, Bhardwaj V.ORCID, Bhuyan B.ORCID, Biswas D.ORCID, Bobrov A.ORCID, Bodrov D.ORCID, Borah J.ORCID, Bozek A.ORCID, Bračko M.ORCID, Branchini P.ORCID, Browder T. E.ORCID, Budano A.ORCID, Campajola M.ORCID, Cao L.ORCID, Červenkov D.ORCID, Chang M.-C.ORCID, Chang P.ORCID, Cheon B. G.ORCID, Chilikin K.ORCID, Cho H. E.ORCID, Cho K.ORCID, Choi S.-K.ORCID, Choi Y.ORCID, Choudhury S.ORCID, Das S.ORCID, De Nardo G.ORCID, De Pietro G.ORCID, Dhamija R.ORCID, Di Capua F.ORCID, Dingfelder J.ORCID, Doležal Z.ORCID, Dong T. V.ORCID, Dubey S.ORCID, Ecker P.ORCID, Epifanov D.ORCID, Ferber T.ORCID, Ferlewicz D.ORCID, Fulsom B. G.ORCID, Gaur V.ORCID, Giri A.ORCID, Goldenzweig P.ORCID, Graziani E.ORCID, Gu T.ORCID, Gudkova K.ORCID, Hadjivasiliou C.ORCID, Hayasaka K.ORCID, Hayashii H.ORCID, Hazra S.ORCID, Hedges M. T.ORCID, Hou W.-S.ORCID, Hsu C.-L.ORCID, Ipsita N.ORCID, Ishikawa A.ORCID, Itoh R.ORCID, Iwasaki M.ORCID, Jacobs W. W.ORCID, Jia S.ORCID, Jin Y.ORCID, Joo K. K.ORCID, Kawasaki T.ORCID, Kim C. H.ORCID, Kim D. Y.ORCID, Kim K.-H.ORCID, Kim Y. J.ORCID, Kim Y.-K.ORCID, Kodyš P.ORCID, Korobov A.ORCID, Korpar S.ORCID, Kovalenko E.ORCID, Križan P.ORCID, Krokovny P.ORCID, Kuhr T.ORCID, Kumar R.ORCID, Kumara K.ORCID, Kumita T.ORCID, Kwon Y.-J.ORCID, Lai Y.-T.ORCID, Lee S. C.ORCID, Levit D.ORCID, Li L. K.ORCID, Li Y.ORCID, Li Y. B.ORCID, Li Gioi L.ORCID, Libby J.ORCID, Liventsev D.ORCID, Luo T.ORCID, Masuda M.ORCID, Matsuda T.ORCID, Maurya S. K.ORCID, Meier F.ORCID, Merola M.ORCID, Metzner F.ORCID, Miyabayashi K.ORCID, Mizuk R.ORCID, Mohanty G. B.ORCID, Mussa R.ORCID, Nakamura I.ORCID, Nakao M.ORCID, Natkaniec Z.ORCID, Natochii A.ORCID, Nayak L.ORCID, Nayak M.ORCID, Niiyama M.ORCID, Nishida S.ORCID, Ogawa S.ORCID, Ono H.ORCID, Pakhlova G.ORCID, Pardi S.ORCID, Park H.ORCID, Park J.ORCID, Park S.-H.ORCID, Paul S.ORCID, Pestotnik R.ORCID, Piilonen L. E.ORCID, Podobnik T.ORCID, Prencipe E.ORCID, Prim M. T.ORCID, Röhrken M.ORCID, Russo G.ORCID, Sandilya S.ORCID, Santelj L.ORCID, Savinov V.ORCID, Schnell G.ORCID, Schwanda C.ORCID, Seino Y.ORCID, Senyo K.ORCID, Sevior M. E.ORCID, Shan W.ORCID, Shiu J.-G.ORCID, Solovieva E.ORCID, Starič M.ORCID, Sumisawa K.ORCID, Takizawa M.ORCID, Tamponi U.ORCID, Tanida K.ORCID, Tenchini F.ORCID, Tiwary R.ORCID, Trabelsi K.ORCID, Uchida M.ORCID, Unno Y.ORCID, Uno S.ORCID, Urquijo P.ORCID, Usov Y.ORCID, Vahsen S. E.ORCID, Varvell K. E.ORCID, Vinokurova A.ORCID, Wang M.-Z.ORCID, Watanuki S.ORCID, Won E.ORCID, Xu X.ORCID, Yabsley B. D.ORCID, Yan W.ORCID, Yook Y.ORCID, Yuan L.ORCID, Zhang Z. P.ORCID, Zhilich V.ORCID, Zhukova V.ORCID,
Abstract
We present a comprehensive study of B0→ωω decays using 772×106 BB¯ pairs collected with the Belle detector at the KEKB e+e− collider. This process is a suppressed charmless decay into two vector mesons and can exhibit interesting polarization and CP violation. The decay is observed for the first time with a significance of 7.9 standard deviations. We measure a branching fraction B=(1.53±0.29±0.17)×10−6, a fraction of longitudinal polarization fL=0.87±0.13±0.13, and a time-integrated CP asymmetry ACP=−0.44±0.43±0.11, where the first uncertainties listed are statistical and the second are systematic. This is the first observation of B0→ωω and the first measurements of fL and ACP for this decay.
Published by the American Physical Society
2024
Funder
Ministry of Education, Culture, Sports, Science and Technology Japan Society for the Promotion of Science Nagoya University Australian Research Council Bundesministerium für Bildung, Wissenschaft und Forschung Austrian Science Fund National Natural Science Foundation of China Key Research Program of Frontier Science, Chinese Academy of Sciences Natural Science Foundation of Shandong Province Grantová Agentura České Republiky H2020 European Research Council Carl-Zeiss-Stiftung Volkswagen Foundation Department of Atomic Energy, Government of India Department of Science and Technology, Ministry of Science and Technology, India Istituto Nazionale di Fisica Nucleare Sezione di Padova National Research Foundation of Korea Korea Institute of Science and Technology Information Ministerstwo Edukacji i Nauki Narodowe Centrum Nauki Ministry of Science and Higher Education of the Russian Federation National Research University Higher School of Economics University of Tabuk Javna Agencija za Raziskovalno Dejavnost RS Ikerbasque, Basque Foundation for Science Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung Ministry of Education Ministry of Science and Technology, Taiwan U.S. Department of Energy National Science Foundation High Energy Accelerator Research Organization Pacific Northwest National Laboratory Environmental Molecular Sciences Laboratory National Institute of Informatics Deutsche Forschungsgemeinschaft Excellence Cluster Universe Radiation Science Research Institute Foreign Large-size Research Facility Application Supporting project GLORIAD Science Information NETwork 6 State Agency for Research of the Spanish Ministry of Science and Innovation
Publisher
American Physical Society (APS)
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