Experimental determination of the isospin of $\hat{I}{›}_c(2765{)}^{+}/\hat{I}{\pounds }_c(2765{)}^{+}$

Abstract

We report an experimental determination of the isospin of $\hat{I}{›}_c(2765{)}^{+}/\hat{I}{\pounds }_c(2765{)}^{+}$ using 980 fb${}^{-1}$ data in the $e^{+}{e}^{-}$ annihilation around $\sqrt{s}=10.6$ GeV collected by the Belle detector located at the KEKB collider. The isospin partners are searched for in the $\hat{I}{\pounds }_c(2455{)}^{++/0}\ddot{I}{€}^0$ channels, and no evidence was obtained. Thus the isospin is determined to be zero, and the particle is established to be a $\hat{I}{›}_c$.

Conference paper submitted for Hadron2019