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- Title
Semileptonic and nonleptonic weak decays of ψ(1S,2S) and ηc(1S,2S) to D(s) in the covariant light-front approach.
- Authors
Sun, Zhi-Jie; Zhang, Zhi-Qing; Yang, You-Ya; Yang, Hao
- Abstract
In addition to the strong and electromagnetic decay modes, the ψ (1 S , 2 S) and η c (1 S , 2 S) can also decay via the weak interaction. Such weak decays can be detected by the high-luminosity heavy-flavor experiments. At present, some of the semileptonic and nonleptonic J / Ψ weak decays have been measured at BESIII. Researching for these charmonium weak decays to D (s) meson can provide a platform to check of the standard model (SM) and probe new physics (NP). So we investigate the semileptonic and nonleptonic weak decays of ψ (1 S , 2 S) and η c (1 S , 2 S) to D (s) within the covariant light-front quark model (CLFQM). With form factors of the transitions ψ (1 S , 2 S) → D (s) and η c (1 S , 2 S) → D (s) calculated under the CLFQM, we predict and discuss some physical observables, such as the branching ratios, the longitudinal polarizations f L and the forward–backward asymmetries A FB . One can find that the Cabibbo-favored semi-leptonic decay channels ψ (1 S , 2 S) → D s - ℓ + ν ℓ with ℓ = e , μ and the nonleptonic decay modes ψ (1 S , 2 S) → D s - ρ + have relatively large branching ratios of the order O (10 - 9) , which are most likely to be accessible at the future high-luminosity experiments.
- Subjects
BRANCHING ratios; QUARK models; STANDARD model (Nuclear physics)
- Publication
European Physical Journal C -- Particles & Fields, 2024, Vol 84, Issue 1, p1
- ISSN
1434-6044
- Publication type
Article
- DOI
10.1140/epjc/s10052-024-12404-6