Recent charm results at Belle

TL;DR

This paper reports recent experimental results from Belle on charm meson and baryon decays, including measurements of CP asymmetries, branching fractions, and properties of excited states, advancing understanding of charm quark dynamics.

Contribution

It provides new measurements of decay rates, CP asymmetries, and quantum numbers of excited charm baryons, offering valuable data for testing theoretical models.

Findings

Measured CP asymmetries and branching fractions for charm meson decays.

Determined branching fractions for various charmed baryon decays.

Investigated properties and quantum numbers of excited charm baryons.

Abstract

We present the selected recent charm results at Belle: (1) the $CP$ asymmetries and branching fractions for the decays of charm mesons, i.e. $D^{0}\to\pi^{+}\pi^{-}\eta,\,K^{+}K^{-}\eta$ and $D^{0}\to\phi\eta$; $D_{s}^{+}\to K^{+}\pi^{0},\,K^{+}\eta$ and $D_{s}^{+}\to\pi^{+}\pi^{0},\,\pi^{+}\eta$. (2) the branching fractions for the decays of charmed baryons, i.e. $\Lambda_{c}^{+}\to p\pi^{0},\,p\eta$; $\Lambda_{c}^{+}\to\Lambda\pi^{+}\eta,\,\Sigma^0\pi^{+}\eta$ and intermediate processes $\Lambda_{c}^{+}\to\Lambda(1670)\pi^{+},\,\eta\Sigma(1385)^+$; $\Xi_c^0\to\Lambda\bar{K}^{*0},\,\Sigma^0\bar{K}^{*0}$ and $\Sigma^+K^{*-}$. (3) properties of excited charmed baryons, i.e. search for electromagnetic transition $\Xi_c(2790,2815)^{+,0}\to\Xi_c^{+,0}\gamma$; and determination of spin-parity of $\Xi_c(2970)^+$.