Sanghoon Kim

Mass and decay angles in the $\Xi_c$--$\Xi_c'$ mixing tension: Virtual hybrids and a single-direction criterion

We compare three definitions of $\Xi_c$--$\Xi_c'$ mixing within a constituent-quark model: a spin-component probability angle, a common-source overlap angle, and an SU(3)-breaking mass-operator angle. The probability angle is $3.11^\circ$, while the two operator-based definitions give $2.48$--$2.58^\circ$; a second par...