Systematic analysis of D(s) meson semi-leptonic decays in the covariant light-front quark model.
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| Title: | Systematic analysis of D(s) meson semi-leptonic decays in the covariant light-front quark model. |
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| Authors: | Yang, Hao1 (AUTHOR), Guo, Shao-Qin1 (AUTHOR), Zhang, Zhi-Qing1 (AUTHOR) zhangzhiqing@haut.edu.cn |
| Source: | European Physical Journal C -- Particles & Fields. Apr2026, Vol. 86 Issue 4, p1-26. 26p. |
| Subjects: | Meson decay, Mesons, Standard model (Nuclear physics), Branching ratios, Quark models, Particle physics |
| Abstract: | The weak decays of the D (s) meson provide a pivotal platform to advance our understanding of the Standard Model (SM) and to explore New Physics (NP). In recent years, experiments have collected a significant amount of data on the D (s) meson decays, particularly from BESIII, which provides substantial support for theoretical research. In this work, we systematically investigate the semi-leptonic decays of D (s) meson to pseudoscalar (P), scalar (S), vector (V), and axial-vector (A) mesons within the framework of the covariant light-front quark model (CLFQM). We calculate the form factors of the transitions D (s) → P , S , V , A and the branching ratios of the corresponding semi-leptonic decays, then compare them with experimental data and results from other theoretical models. The form factor values of the transitions D (s) → P , V obtained from the CLFQM are consistent with those of other theoretical models and available data in most cases. However, significant discrepancies are found in some specific D (s) → S , A transitions, such as D → a 0 (980) , a 0 (1450) and D (s) → K 1 B , compared to other theoretical calculations. The predicted branching ratios for the semi-leptonic decays D → P (V) ℓ ν ℓ with ℓ = e , μ agree well with experimental data and other theoretical results in most decay channels, validating the reliability of the model. However, for some D → S (V) ℓ ν ℓ decays, tension exists among different theoretical predictions and experimental results. Further clarification of such differences is necessary. Our study provides important insights into the internal structures for some scalar and axial-vector mesons and serves as a theoretical reference for future experiments. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | The weak decays of the D (s) meson provide a pivotal platform to advance our understanding of the Standard Model (SM) and to explore New Physics (NP). In recent years, experiments have collected a significant amount of data on the D (s) meson decays, particularly from BESIII, which provides substantial support for theoretical research. In this work, we systematically investigate the semi-leptonic decays of D (s) meson to pseudoscalar (P), scalar (S), vector (V), and axial-vector (A) mesons within the framework of the covariant light-front quark model (CLFQM). We calculate the form factors of the transitions D (s) → P , S , V , A and the branching ratios of the corresponding semi-leptonic decays, then compare them with experimental data and results from other theoretical models. The form factor values of the transitions D (s) → P , V obtained from the CLFQM are consistent with those of other theoretical models and available data in most cases. However, significant discrepancies are found in some specific D (s) → S , A transitions, such as D → a 0 (980) , a 0 (1450) and D (s) → K 1 B , compared to other theoretical calculations. The predicted branching ratios for the semi-leptonic decays D → P (V) ℓ ν ℓ with ℓ = e , μ agree well with experimental data and other theoretical results in most decay channels, validating the reliability of the model. However, for some D → S (V) ℓ ν ℓ decays, tension exists among different theoretical predictions and experimental results. Further clarification of such differences is necessary. Our study provides important insights into the internal structures for some scalar and axial-vector mesons and serves as a theoretical reference for future experiments. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 14346044 |
| DOI: | 10.1140/epjc/s10052-026-15484-8 |
