Study of K S 0 - K L 0 asymmetry in the decays D 0 → K S 0 ω and D 0 → K L 0 ω

Based on $e^+ e^-$ annihilation data corresponding to an integrated luminosity of 7.93~$fb^{-1}$ collected at a center-of-mass energy of 3.773 GeV with the BESIII detector at the BEPCII collider, the absolute branching fractions of the decays $D^0 \to K_{S}^{0} ω$ and $D^0 \to K_{L}^{0} ω$ are measured to be $(11.79 \pm 0.19 \pm 0.26 \pm 0.47) \times 10^{-3}$ and ($10.84 \pm 0.14 \pm 0.23 \pm 0.44) \times 10^{-3}$, respectively. The $K_{S}^{0}- K_{L}^{0}$ branching-fraction asymmetry of these two decays is $R(D^0,K_{S,L}^{0} ω) = \frac{\mathcal{B}(D^0 \to K_{S}^{0} ω) - \mathcal{B}(D^0 \to K_{L}^{0}ω)}{\mathcal{B}(D^0 \to K_{S}^{0} ω) + \mathcal{B}(D^0 \to K_{L}^{0} ω)} =(4.2 \pm 1.0 \pm 0.9 \pm 2.8)\%$. Here, the first uncertainties are statistical, the second systematic, and the third arise from the interference between $D^0 \to K_{S,L}^{0} ω$ and the non-resonant $D^0 \to π^+ π^- π^0 K_{S,L}^{0}$ processes.

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Publication Details

Journal
Physical review. D/Physical review. D.
Published
2026-11-04
DOI
https://doi.org/10.1103/692q-3tpm
Primary Topic
Particle physics theoretical and experimental studies
Type
article
Field-Weighted Citation Impact
0.00

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article

Study of K S 0 - K L 0 asymmetry in the decays D 0 → K S 0 ω and D 0 → K L 0 ω

W. X. Fang, H. L. Dai, Z. K. Chen, S. S. Fang et al.
Physical review. D/Physical review. D.
Particle physics theoretical and experimental studies
article

Study of K S 0 - K L 0 asymmetry in the decays D 0 → K S 0 ω and D 0 → K L 0 ω

W. X. Fang, H. L. Dai, Z. K. Chen, S. S. Fang, M. C. Du, J. Dong, Y. B. Chen, Chao Chen, Z. Y. Deng, X. X. Ding, G. R. Che, T. Chen, J. F. Chang, Shaoxu Du, J. Fang, J. P. Dai, Q. An, H. -R. Bao, Y. Z. Che, Yi. Ding, Jin Fang, C. Q. Deng, H. Cai, A. Dbeyssi, Y. H. Fan, G. F. Cao, Y. Y. Duan, H. S. Chen, S. X. Du, J. J. Fan, C. H. Chen, Y. H. An, Y. Q. Du, M. L. Chen, M. H. Cai, M. Y. Dong, Y. X. Ding, G. Chen, X. R. Chen, S. M. Chen, J. Cheng, W. Chen, L. Y. Dong, X. L. Du, G. F. Fan, A. Brueggemann, H. Cai, M. N. Achasov, F. Cossio, L. Fava, A. Dbeyssi, S. K. Choi, E. Di Fiore, P. Adlarson, G. R. Che, G. Cibinetto, Q. An, R. Aliberti, O. Bakina, K. Begzsuren, M. Ablikim, F. De Mori, J. Cottee-Meldrum, G. F. Fan, M. Barbagiovanni, S. A. Cetin, N. Berger, H. R. Bao, C. S. Akondi, I. Denisenko, X. X. Ding, M. Berlowski, X. Y. Chai, E. Bianco, F. Bianchi, C. Q. Deng, V. Batozskaya, P. Egorov, A. Calcaterra, I. Boyko, M. B. Bertani, G. F. Cao, R. A. Briere, X. Chu, D. Cabiati, H. L. Dai, A. Bortone, J. F. Chang, D. Bettoni, M. Destefanis, D. Dedovich, M. C. Du, X. C. Ai, A. Amoroso
article en

Abstract

Based on $e^+ e^-$ annihilation data corresponding to an integrated luminosity of 7.93~$fb^{-1}$ collected at a center-of-mass energy of 3.773 GeV with the BESIII detector at the BEPCII collider, the absolute branching fractions of the decays $D^0 \to K_{S}^{0} ω$ and $D^0 \to K_{L}^{0} ω$ are measured to be $(11.79 \pm 0.19 \pm 0.26 \pm 0.47) \times 10^{-3}$ and ($10.84 \pm 0.14 \pm 0.23 \pm 0.44) \times 10^{-3}$, respectively. The $K_{S}^{0}- K_{L}^{0}$ branching-fraction asymmetry of these two decays is $R(D^0,K_{S,L}^{0} ω) = \frac{\mathcal{B}(D^0 \to K_{S}^{0} ω) - \mathcal{B}(D^0 \to K_{L}^{0}ω)}{\mathcal{B}(D^0 \to K_{S}^{0} ω) + \mathcal{B}(D^0 \to K_{L}^{0} ω)} =(4.2 \pm 1.0 \pm 0.9 \pm 2.8)\%$. Here, the first uncertainties are statistical, the second systematic, and the third arise from the interference between $D^0 \to K_{S,L}^{0} ω$ and the non-resonant $D^0 \to π^+ π^- π^0 K_{S,L}^{0}$ processes.

Physical review. D/Physical review. D.
U.S. Department of Energy, National Research Foundation, Deutsche Forschungsgemeinschaft, National Research Foundation of Korea, Knut och Alice Wallenbergs Stiftelse, Vetenskapsrådet, Istituto Nazionale di Fisica Nucleare, Shanghai Key Laboratory for Particle Physics and Cosmology, Science and Technology Facilities Council
Openalex Percentile: Top 36%
Particle physics theoretical and experimental studies
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