Search for the charmonium weak decay $$ J/\psi \to {\overline{D}}^0{\overline{K}}^{\ast 0}+\textrm{c}.\textrm{c}. $$

M. Ablikim; M. N. Achasov; P. Adlarson; X. C. Ai; R. Aliberti; A. Amoroso; Q. An; Y. Bai; O. Bakina; Y. Ban; H. R. Bao; Batozskaya; K. Begzsuren; N. Berger; M. Berlowski; M. Bertani; D BETTONI; F. Bianchi; E. Bianco; A. Bortone; I. Boyko; R. A. Briere; A. Brueggemann; H. Cai; M. H. Cai; X. Cai; A Calcaterra; G. F. Cao; N. Cao; S. A. Cetin; X. Y. Chai; J. F. Chang; G. R. Che; Y. Z. Che; C. H. Chen; C. H. Chen; G. Chen; H S Chen; H S Chen; M. L. Chen; S. M. Chen; S. L. Chen; S. M. Chen; T T Chen; X. R. Chen; X. R. Chen; X. Y. Chen; Y. Q. Chen; Y. Q. Chen; Y. Q. Chen; Z H Chen; Z. K. Chen; J. C. Cheng; S. K. Choi; X. Chu; G. Cibinetto; F. Cossio; J. Cottee-Meldrum; J. J. Cui; H. L. Dai; J. P. Dai; X. C. Dai; A. Dbeyssi; R. E. de Boer; D. Dedovich; C. Q. Deng; Z. Y. Deng; A. Denig; I. Denysenko; M. Destefanis; F. De Mori; B. Ding; X. X. Ding; Y. Ding; Y. Ding; Yan Ding; J. Dong; L. Y. Dong; M. Y. Dong; X. Dong; M. C. Du; S. X. Du; S. X. Du; Y. Y. Duan; Z. H. Duan; P. Egorov; G. F. Fan; J. J. Fan; Y. H. Fan; J. Fang; J. Fang; S. S. Fang; W. X. Fang; Y. Q. Fang; L. Fava; F Feldbauer; G. Felici; C. Q. Feng; J. H. Feng; L. Feng

doi:10.1007/jhep05(2026)126

Search for the charmonium weak decay $$ J/\psi \to {\overline{D}}^0{\overline{K}}^{\ast 0}+\textrm{c}.\textrm{c}. $$

Journal of High Energy Physics 2026 Open access

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Authors: M. Ablikim, M. N. Achasov, P. Adlarson, X. C. Ai, R. Aliberti, A. Amoroso, Q. An, Y. Bai, O. Bakina, Y. Ban, H. R. Bao, Batozskaya

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K. Begzsuren, N. Berger, M. Berlowski, M. Bertani, D BETTONI, F. Bianchi, E. Bianco, A. Bortone, I. Boyko, R. A. Briere, A. Brueggemann, H. Cai, M. H. Cai, X. Cai, A Calcaterra, G. F. Cao, N. Cao, S. A. Cetin, X. Y. Chai, J. F. Chang, G. R. Che, Y. Z. Che, C. H. Chen, C. H. Chen, G. Chen, H S Chen, H S Chen, M. L. Chen, S. M. Chen, S. L. Chen, S. M. Chen, T T Chen, X. R. Chen, X. R. Chen, X. Y. Chen, Y. Q. Chen, Y. Q. Chen, Y. Q. Chen, Z H Chen, Z. K. Chen, J. C. Cheng, S. K. Choi, X. Chu, G. Cibinetto, F. Cossio, J. Cottee-Meldrum, J. J. Cui, H. L. Dai, J. P. Dai, X. C. Dai, A. Dbeyssi, R. E. de Boer, D. Dedovich, C. Q. Deng, Z. Y. Deng, A. Denig, I. Denysenko, M. Destefanis, F. De Mori, B. Ding, X. X. Ding, Y. Ding, Y. Ding, Yan Ding, J. Dong, L. Y. Dong, M. Y. Dong, X. Dong, M. C. Du, S. X. Du, S. X. Du, Y. Y. Duan, Z. H. Duan, P. Egorov, G. F. Fan, J. J. Fan, Y. H. Fan, J. Fang, J. Fang, S. S. Fang, W. X. Fang, Y. Q. Fang, L. Fava, F Feldbauer, G. Felici, C. Q. Feng, J. H. Feng, L. Feng

DOI: 10.1007/jhep05(2026)126

Cited by: 1

References: 28

Abstract

A bstract Based on a sample of (10087 ± 44) × 10 6 J / ψ events collected at the center-of-mass energy $$ \sqrt{s}=3.0969 $$ s = 3.0969 GeV with the BESIII detector, we search for the charmonium rare weak decay $$ J/\psi \to {\overline{D}}^0{\overline{K}}^{\ast 0}+\textrm{c}.\textrm{c}. $$ J / ψ → D ¯ 0 K ¯ ∗ 0 + c . c . . No significant signal is observed, and the upper limit on its decay branching fraction at the 90% confidence level is set as 1.4 × 10 − 7 , improving the sensitivity of the previous best limit by an order of magnitude.

Fields of Study & Subjects

Quantum Chromodynamics and Particle Interactions Particle physics theoretical and experimental studies Astrophysics and Cosmic Phenomena

Publication details

Journal / source: Journal of High Energy Physics
Publisher: Springer Science and Business Media LLC
Volume: 2026
Issue: 5
Publication date: 12 May 2026
Language: EN

References 28