Prospective analysis of CKM element |Vcd| and D+-meson decay constant from leptonic decays D+ → ℓ+ν
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...
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Elsevier
2025-02-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269324007986 |
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| author | Ya-Xiong Wang Hai-Jiang Tian Yin-Long Yang Tao Zhong Hai-Bing Fu |
| author_facet | Ya-Xiong Wang Hai-Jiang Tian Yin-Long Yang Tao Zhong Hai-Bing Fu |
| author_sort | Ya-Xiong Wang |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-fef2da110ec345ae93f7bdb549f72951 |
| institution | Kabale University |
| issn | 0370-2693 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj-art-fef2da110ec345ae93f7bdb549f729512025-02-10T04:33:51ZengElsevierPhysics Letters B0370-26932025-02-01861139240Prospective analysis of CKM element |Vcd| and D+-meson decay constant from leptonic decays D+ → ℓ+νYa-Xiong Wang0Hai-Jiang Tian1Yin-Long Yang2Tao Zhong3Hai-Bing Fu4Department of Physics, Guizhou Minzu University, Guiyang 550025, PR ChinaDepartment of Physics, Guizhou Minzu University, Guiyang 550025, PR ChinaDepartment of Physics, Guizhou Minzu University, Guiyang 550025, PR ChinaDepartment of Physics, Guizhou Minzu University, Guiyang 550025, PR China; Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, PR ChinaDepartment of Physics, Guizhou Minzu University, Guiyang 550025, PR China; Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, PR China; Corresponding author.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.http://www.sciencedirect.com/science/article/pii/S0370269324007986 |
| spellingShingle | Ya-Xiong Wang Hai-Jiang Tian Yin-Long Yang Tao Zhong Hai-Bing Fu Prospective analysis of CKM element |Vcd| and D+-meson decay constant from leptonic decays D+ → ℓ+ν Physics Letters B |
| title | Prospective analysis of CKM element |Vcd| and D+-meson decay constant from leptonic decays D+ → ℓ+ν |
| title_full | Prospective analysis of CKM element |Vcd| and D+-meson decay constant from leptonic decays D+ → ℓ+ν |
| title_fullStr | Prospective analysis of CKM element |Vcd| and D+-meson decay constant from leptonic decays D+ → ℓ+ν |
| title_full_unstemmed | Prospective analysis of CKM element |Vcd| and D+-meson decay constant from leptonic decays D+ → ℓ+ν |
| title_short | Prospective analysis of CKM element |Vcd| and D+-meson decay constant from leptonic decays D+ → ℓ+ν |
| title_sort | prospective analysis of ckm element vcd and d meson decay constant from leptonic decays d l ν |
| url | http://www.sciencedirect.com/science/article/pii/S0370269324007986 |
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