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Charm Physics at BESIII

BESIII collected the world largest data samples of 2.93, 0.482 and 0.567 \(fb^{-1}\) data at 3.773, 4.009 and 4.6 GeV, respectively. Based on these data samples, BESIII perform some analyses of \(D^{0(+)}\), \(D_s^+\) and \(\Lambda^+_c\), which are important to understand the weak decay machanism of charmed mesons and baryons. The leptonic decays of \(D^+\to\tau^+ \nu_{\tau}\) and \(D^{+}_{s} \to \ell^+ \nu_{\ell}\) are measured. The dynamics of \(D^+\to \bar{K}^0 e^+ \nu_e\), \(\pi^0 e^+ \nu_e\) and \(K^{-}\pi^+ e^+ \nu_e\) are studied, and the parameters of the form factors and CKM matrix elements |\(V_{cs(d)}\)| are extracted. In addition, the branching fractions for \(D^+ \to \bar{K}^0 \mu^+ \nu_{\mu}\), \(\bar{K}^0 e^+ \nu_e\), \(D^+_s \to \eta^{(\prime)} e^+ \nu_e\) are also provided. The amplitude analysis of \(D^0\to K^-\pi^+\pi^+\pi^-\) is performed. The asymmetries of \(D^+\to K_{S/L}K^+(\pi^0)\) and \(D^0\to K_{S/L}\pi^0(\pi^0)\) decays are measured. The ranching fractions for \(D^+\to 2K_S K^+\), \(2K_S\pi^+\), \(D^0\to 2K_S\), \(K_S\) as well as \(D^{0(+)}\to\) other 14 channels of PP final states are determined. Finally, the measurement of the Singly-Cabibbo-suppressed decays \(\Lambda_c^+\to p \pi^{+} \pi^{-}, pK^+K^{-}\), the Cabibbo-favored decays of \(\Lambda^+_c\to\Sigma^-\pi^+\pi^+(\pi^0)\) have been obtained.

Further reading: X. Shi, Charm Physics at BESIII, PoS DIS2017, 146 (2017)