Comments on charmed baryon pair production in e+e−-annihilation

We show that the symmetric quark model calculation of charmed baryon pair creation in e⁺e^?-annihilation has an incorrect threshold structure. The cc?-pair creation model possesses the correct s-wave threshold behaviour, if the cc?-pair and diquark pair are created in orbital s-waves. We show that the two models become identical for a specific orbital configuration and discuss implications for the relative production rates of $\text{Λ}{}_{\mathrm{<mtext>c</mtext>}}\text{Λ}{}_{\mathrm{<mtext>c</mtext>}}\text{:Σ}{}_{\mathrm{<mtext>c</mtext>}}\text{Σ}{}_{\mathrm{<mtext>c</mtext>}}\text{:Σ}{}_{\mathrm{<mtext>c</mtext>}}\text{Σ}{}_{\mathrm{<mtext>c</mtext>}}{}^1\text{+Σ}{}_{\mathrm{<mtext>c</mtext>}}{}^1\text{Σ}{}_{\mathrm{<mtext>c</mtext>}}\text{:Σ}{}_{\mathrm{<mtext>c</mtext>}}{}^1{}_{\mathrm{<mtext>c</mtext>}}{}^1$.