Recent charm results from Belle

TL;DR

This paper reports recent charm physics results from the Belle experiment, including mixing measurements, Dalitz analysis, branching fractions, and spin-parity determinations, advancing understanding of charm mesons and baryons.

Contribution

It presents the first measurements of several charm decay parameters and the spin-parity of a charmed-strange baryon, providing new insights into charm quark dynamics.

Findings

Measured mixing parameter y_CP with uncertainty

Performed first Dalitz-plot analysis of D^0 decay

Determined spin and parity of Xi_c(2970)^+

Abstract

Recent charm results from Belle experiment are presented in this proceedings, including (1) measurement of mixing parameter $y_{CP}=(0.96\pm0.91\pm 0.62^{+0.17}_{-0.00})\%$ in $CP$-odd decay for the first time, (2) the first Dalitz-plot analysis of $D^0\to K^-\pi^+\eta$, (3) measurement of branching fractions of $\Lambda_c^+\to\eta\Lambda^0\pi^+$ and $\eta\Sigma^0\pi^+$ and intermediate processes $\Lambda_c^+\to[\Lambda(1670)\to\eta\Lambda^0]\pi^+$ and $\Lambda_c^+\to\eta\Sigma(1385)^+$ relative to $\Lambda_c^+\to p K^-\pi^+$: $0.293\pm0.003\pm0.014$, $0.120\pm0.006\pm0.006$, $(5.54\pm0.29\pm0.73)\times10^{-2}$, and $0.192\pm 0.006\pm 0.016$, respectively, and (4) first determination of the spin and parity of a charmed-strange baryon $\Xi_c(2970)^+$ which is consistent with the HQSS prediction for $J^P(s_l)=1/2^+(0)$.