TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysProc.1.016
TI  - Test lepton flavor universality with (semi)leptonic $D$ decays at BESIII
PY  - 2019/02/19
UR  - https://www.scipost.org/SciPostPhysProc.1.016
JF  - SciPost Physics Proceedings
JA  - SciPost Phys. Proc.
VL  - 
IS  - 1
SP  - 016
A1  - Zhang, Sifan
AB  - Using 2.93~fb$^{-1}$ data taken at $\sqrt{s}=3.773$~GeV, 0.482~fb$^{-1}$ data taken at $\sqrt{s}=4.009$~GeV and 3.19~fb$^{-1}$ data taken at $\sqrt{s}=4.178$~GeV with the BESIII detector, precision measurements of the branching fractions of $D^0\to K^-\mu^+\nu_\mu$, $D^+\to\bar K^0\mu^+\nu_\mu$, $D^0\to\pi^-\mu^+\nu_\mu$, $D^+\to\pi^0\mu^+\nu_\mu$, $D^+\to\ell^+\nu_\ell$ and $D_s^+\to\ell^+\nu_\ell$ are performed. Combining the known branching fractions of $D\to\bar Ke^+\nu_e$, $D\to\pi e^+\nu_e$ and $D^+_s\to\tau^+\nu_\tau$, we have tested the lepton flavor universality with $D\to\bar K\ell^+\nu_\ell$, $D\to\pi\ell^+\nu_\ell$, $D^+\to\ell^+\nu_\ell$ and $D_{s}^+\to\ell^+\nu_\ell$ decays. We have also tested lepton flavor universality in different $q_{\ell\nu_\ell}^2$ intervals for $D\to\bar K\ell^+\nu_\ell$~($\ell=e$ or $\mu$). Besides, hadronic form factor $f_+^K(0)$, $D$ meson decay constant $f_{D_s^+}$ and $f_{D^+}$, and quark mixing matrix element $|V_{cs}|$ and $|V_{cd}|$ are also extracted with the most precise accuracies to date.
ER  -

@Article{10.21468/SciPostPhysProc.1.016,
	title={{Test lepton flavor universality with (semi)leptonic $D$ decays at BESIII}},
	author={S. F. Zhang on behalf of the BESIII Collaboration},
	journal={SciPost Phys. Proc.},
	pages={016},
	year={2019},
	publisher={SciPost},
	doi={10.21468/SciPostPhysProc.1.016},
	url={https://scipost.org/10.21468/SciPostPhysProc.1.016},
}