التفاصيل البيبلوغرافية
| العنوان: |
Prospective analysis of CKM element |Vcd| and D+-meson decay constant from leptonic decays D+ → ℓ+ν |
| المؤلفون: |
Ya-Xiong Wang, Hai-Jiang Tian, Yin-Long Yang, Tao Zhong, Hai-Bing Fu |
| المصدر: |
Physics Letters B, Vol 861, Iss , Pp 139240- (2025) |
| بيانات النشر: |
Elsevier, 2025. |
| سنة النشر: |
2025 |
| المجموعة: |
LCC:Physics |
| مصطلحات موضوعية: |
Physics, QC1-999 |
| الوصف: |
The leptonic decay of D+-meson has attracted significant interest due to its unique characteristics. In this paper, we carry out an investigation into the D+-meson leptonic decays D+→ℓ+νℓ with ℓ=(e,μ,τ) by employing the QCD sum rules approach. In which the D+-meson decay constant fD+ is an important input parameter in the process. To enhance the accuracy of our calculations for fD+, we consider the quark propagator and vertex up to dimension-six within the framework of background field theory. Consequently, we obtain the QCD sum rule expression for fD+ up to dimension-six condensates, yielding fD+=203.0±1.5MeV. Our result is in good agreement with BESIII measurements and theoretical predictions. We also present the integrated decay widths for the D+-meson in three channels Γ(D+→e+νe)=(5.263−0.075+0.076)×10−21GeV, Γ(D+→μ+νμ)=(2.236−0.032+0.032)×10−16GeV and Γ(D+→τ+ντ)=(5.958−0.085+0.086)×10−16GeV. Accordingly, we compute the branching fractions B(D+→ℓ+νℓ) with the electron, muon and tau channels, which are B(D+→e+νe)=(8.260−0.118+0.119)×10−9, B(D+→μ+νμ)=(3.508−0.050+0.051)×10−4 and B(D+→τ+ντ)=(0.935−0.013+0.013)×10−3. Furthermore, we present our prediction for the CKM matrix element |Vcd| using the branching fraction B(D+→μ+νμ) obtained from BESIII Collaboration, yielding |Vcd|=0.227−0.001+0.002. |
| نوع الوثيقة: |
article |
| وصف الملف: |
electronic resource |
| اللغة: |
English |
| تدمد: |
0370-2693 |
| Relation: |
http://www.sciencedirect.com/science/article/pii/S0370269324007986; https://doaj.org/toc/0370-2693 |
| DOI: |
10.1016/j.physletb.2024.139240 |
| URL الوصول: |
https://doaj.org/article/fef2da110ec345ae93f7bdb549f72951 |
| رقم الانضمام: |
edsdoj.fef2da110ec345ae93f7bdb549f72951 |
| قاعدة البيانات: |
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