Form factors in semileptonic decay of D mesons
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arXiv
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| Format: | Preprint |
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2025
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| author | Shen, Tinghong Chen, Ying Gong, Ming Li, Dong-Hao Liu, Keh-Fei Liu, Zhaofeng Zhang, Zhenyu |
| author_facet | Shen, Tinghong Chen, Ying Gong, Ming Li, Dong-Hao Liu, Keh-Fei Liu, Zhaofeng Zhang, Zhenyu |
| contents | We study the vector, scalar and tensor form factors for the semileptonic process $D\rightarrow K$ by using lattice Quantum Chromodynamcs (QCD). Chiral lattice fermions are used in our study: overlap fermion for the valence quark and domain-wall fermion for the sea. The 2+1-flavor configurations are from the RBC-UKQCD Collaborations with an inverse lattice spacing $1/a=2.383(9)$ GeV. A modified $z$-expansion taking into account valence quark mass dependence is used to fit our numerical results of the form factors at a fixed pion mass $\sim360$ MeV in the sea. At the physical valence quark mass point we give the preliminary results $f_+(0)=f_0(0)=0.760(39)$ and $f_T(0)=0.733(50)$ with only statistical uncertainties. For $f_T$ the number is given in the $\overline{\rm MS}$ scheme at a scale of 2 GeV. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_01219 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Form factors in semileptonic decay of D mesons Shen, Tinghong Chen, Ying Gong, Ming Li, Dong-Hao Liu, Keh-Fei Liu, Zhaofeng Zhang, Zhenyu High Energy Physics - Lattice We study the vector, scalar and tensor form factors for the semileptonic process $D\rightarrow K$ by using lattice Quantum Chromodynamcs (QCD). Chiral lattice fermions are used in our study: overlap fermion for the valence quark and domain-wall fermion for the sea. The 2+1-flavor configurations are from the RBC-UKQCD Collaborations with an inverse lattice spacing $1/a=2.383(9)$ GeV. A modified $z$-expansion taking into account valence quark mass dependence is used to fit our numerical results of the form factors at a fixed pion mass $\sim360$ MeV in the sea. At the physical valence quark mass point we give the preliminary results $f_+(0)=f_0(0)=0.760(39)$ and $f_T(0)=0.733(50)$ with only statistical uncertainties. For $f_T$ the number is given in the $\overline{\rm MS}$ scheme at a scale of 2 GeV. |
| title | Form factors in semileptonic decay of D mesons |
| topic | High Energy Physics - Lattice |
| url | https://arxiv.org/abs/2503.01219 |