Study of Excited $\Xi_c$ States Decaying into $\Xi_c^0$ and $\Xi_c^+$ Baryons

TL;DR

This study measures the masses and widths of excited $\\Xi_c$ baryons decaying into ground state $\\Xi_c$ baryons, providing new insights into their properties using a large data sample from the Belle detector.

Contribution

It provides the first precise measurements of masses and widths for several excited $\\Xi_c$ states and reports evidence of new decay transitions.

Findings

Masses of $\\Xi_c^{\prime}$, $\\Xi_c(2645)$, $\\Xi_c(2790)$, $\\Xi_c(2815)$, and $\\Xi_c(2980)$ measured.

Intrinsic widths of strongly decaying states determined.

Evidence found for previously unknown decay transitions.

Abstract

Using a data sample of 980 ${\rm fb}^{-1}$ of $e^+e^-$ annihilation data taken with the Belle detector operating at the KEKB asymmetric-energy $e^+e^-$ collider, we report the results of a study of excited $\Xi_c$ states that decay, via the emission of photons and/or charged pions, into $\Xi_c^0$ or $\Xi_c^+$ ground state charmed-strange baryons. We present new measurements of the masses of all members of the $\Xi_c^{\prime}$, $\Xi_c(2645)$, $\Xi_c(2790)$, $\Xi_c(2815)$, and $\Xi_c(2980)$ isodoublets, measurements of the intrinsic widths of those that decay strongly, and evidence of previously unknown transitions.