Observation of Significant Flavor-SU(3) Breaking in the Kaon Wave Function at 12 Ablikim, M; Achasov, M N; Adlarson, P; Ai, X C; Aliberti, R; Amoroso, A; An, M R; An, Q; Bai, Y; Bakina, O; Balossino, I; Ban, Y; Bao, H-R; Batozskaya, V; Begzsuren, K; Berger, N; Berlowski, M; Bertani, M; Bettoni, D; Bianchi, F; Bianco, E; Bortone, A; Boyko, I; Briere, R A; Brueggemann, A; Cai, H; Cai, X; Calcaterra, A; Cao, G F; Cao, N; Cetin, S A; Chang, J F; Chang, T T; Chang, W L; Che, G R; Chelkov, G; Chen, C; Chen, Chao; Chen, G; Chen, H S; Chen, M L; Chen, S J; Chen, S L; Chen, S M; Chen, T; Chen, X R; Chen, X T; Chen, Y B; Chen, Y Q; Chen, Z J. Afiliação Ablikim M; Institute of High Energy Physics, Beijing 100049, People's Republic of China. Achasov MN; Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia. Adlarson P; Uppsala University, Box 516, SE-75120 Uppsala, Sweden. Ai XC; Zhengzhou University, Zhengzhou 450001, People's Republic of China. Aliberti R; Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany. Amoroso A; University of Turin and INFN, University of Turin, I-10125 Turin, Italy. An MR; INFN, I-10125, Turin, Italy. An Q; Liaoning Normal University, Dalian 116029, People's Republic of China. Bai Y; State Key Laboratory of Particle Detection and Electronics, Beijing 100049, Hefei 230026, People's Republic of China. Bakina O; University of Science and Technology of China, Hefei 230026, People's Republic of China. Balossino I; Southeast University, Nanjing 211100, People's Republic of China. Ban Y; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia. Bao HR; INFN Sezione di Ferrara, INFN Sezione di Ferrara, I-44122 Ferrara, Italy. Batozskaya V; Peking University, Beijing 100871, People's Republic of China. Begzsuren K; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China. Berger N; Institute of High Energy Physics, Beijing 100049, People's Republic of China. Berlowski M; National Centre for Nuclear Research, Warsaw 02-093, Poland. Bertani M; Institute of Physics and Technology, Peace Avenue 54B, Ulaanbaatar 13330, Mongolia. Bettoni D; Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany. Bianchi F; National Centre for Nuclear Research, Warsaw 02-093, Poland. Bianco E; INFN Laboratori Nazionali di Frascati, INFN Laboratori Nazionali di Frascati, I-00044 Frascati, Italy. Bortone A; INFN Sezione di Ferrara, INFN Sezione di Ferrara, I-44122 Ferrara, Italy. Boyko I; University of Turin and INFN, University of Turin, I-10125 Turin, Italy. Briere RA; INFN, I-10125, Turin, Italy. Brueggemann A; University of Turin and INFN, University of Turin, I-10125 Turin, Italy. Cai H; INFN, I-10125, Turin, Italy. Cai X; University of Turin and INFN, University of Turin, I-10125 Turin, Italy. Calcaterra A; INFN, I-10125, Turin, Italy. Cao GF; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia. Cao N; Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA. Cetin SA; University of Muenster, Wilhelm-Klemm-Strasse 9, 48149 Muenster, Germany. Chang JF; Wuhan University, Wuhan 430072, People's Republic of China. Chang TT; Institute of High Energy Physics, Beijing 100049, People's Republic of China. Chang WL; State Key Laboratory of Particle Detection and Electronics, Beijing 100049, Hefei 230026, People's Republic of China. Che GR; INFN Laboratori Nazionali di Frascati, INFN Laboratori Nazionali di Frascati, I-00044 Frascati, Italy. Chelkov G; Institute of High Energy Physics, Beijing 100049, People's Republic of China. Chen C; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China. Chen C; Institute of High Energy Physics, Beijing 100049, People's Republic of China. Chen G; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China. Chen HS; Turkish Accelerator Center Particle Factory Group, Istinye University, 34010 Istanbul, Turkey. Chen ML; Institute of High Energy Physics, Beijing 100049, People's Republic of China. Chen SJ; State Key Laboratory of Particle Detection and Electronics, Beijing 100049, Hefei 230026, People's Republic of China. Chen SL; Xinyang Normal University, Xinyang 464000, People's Republic of China. Chen SM; Institute of High Energy Physics, Beijing 100049, People's Republic of China. Chen T; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China. Chen XR; Nankai University, Tianjin 300071, People's Republic of China. Chen XT; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia. Chen YB; Nankai University, Tianjin 300071, People's Republic of China. Chen YQ; Soochow University, Suzhou 215006, People's Republic of China. Chen ZJ; Institute of High Energy Physics, Beijing 100049, People's Republic of China. Phys Rev Lett ; 132(13): 131901, 2024 Mar 29. Article em En | MEDLINE | ID: mdl-38613263

ABSTRACT

We present cross sections for the reaction e^{+}e^{-}→K_{S}^{0}K_{L}^{0} at center-of-mass energies ranging from 3.51 to 4.95 GeV using data samples collected in the BESIII experiment, corresponding to a total integrated luminosity of 26.5 fb^{-1}. The ratio of neutral-to-charged kaon form factors at large momentum transfers (12wave function, and, consequently, excludes the possibility that flavor-SU(3) breaking is the primary reason for the strong experimental violation of the pQCD prediction |F(π^{±})|/|F(K^{±})|=f_{π}^{2}/f_{K}^{2}, where F(π^{±}) and F(K^{±}) are the form factors, and f_{π} and f_{K} are the decay constants of charged pions and kaons, respectively. We also observe a significant signal for the charmless decay ψ(3770)→K_{S}^{0}K_{L}^{0} for the first time. Within a 1σ contour of the likelihood value, the branching fraction for ψ(3770)→K_{S}^{0}K_{L}^{0} is determined to be B=(2.63_{-1.59}^{+1.40})×10^{-5}, and the relative phase between the continuum and ψ(3770) amplitudes is ϕ=(-0.39_{-0.10}^{+0.05})π. The branching fraction is in good agreement with the S- and D-wave charmonia mixing scheme proposed in the interpretation of the "ρπ puzzle" between J/ψ and ψ(3686) decays.