Using 106 $\times 10^{ 6}$ $\psi^{ \prime}$ decays collected with the BESIII detector at the BEPCII, three decays of $\chi_{ cJ}$ ($J=0,1,2$) with baryon pairs ($\llb$, $\ssb$, $\SSB$) in the final state have been studied. The branching fractions are measured to be $\cal{ B}$$(\chi_{ c0,1,2}\rightarrow\Lambda\bar\Lambda) =(33.3 \pm 2.0 \pm 2.6)\times 10^{ -5}$, $(12.2 \pm 1.1 \pm 1.1)\times 10^{ -5}$, $(20.8 \pm 1.6 \pm 2.3)\times 10^{ -5}$; $\cal{ B}$$(\chi_{ c0,1,2}\rightarrow\Sigma^{ 0}\bar\Sigma^{ 0})$ = $(47.8 \pm 3.4 \pm 3.9)\times 10^{ -5}$, $(3.8 \pm 1.0 \pm 0.5)\times 10^{ -5}$, $(4.0 \pm 1.1 \pm 0.5) \times 10^{ -5}$; and $\cal{ B}$$(\chi_{ c0,1,2}\rightarrow\Sigma^{ +}\bar\Sigma^{ -})$ = $(45.4 \pm 4.2 \pm 3.0)\times 10^{ -5}$, $(5.4 \pm 1.5 \pm 0.5)\times 10^{ -5}$, $(4.9 \pm 1.9 \pm 0.7)\times 10^{ -5}$, where the first error is statistical and the second is systematic. Upper limits on the branching fractions for the decays of $\chi_{ c1,2}\rightarrow\Sigma^{ 0}\bar\Sigma^{ 0}$, $\Sigma^{ +}\bar\Sigma^{ -}$, are estimated to be $\cal{ B}$$(\chi_{ c1}\rightarrow\Sigma^{ 0}\bar\Sigma^{ 0}) < 6.2\times 10^{ -5}$, $\cal{ B}$$(\chi_{ c2}\rightarrow\Sigma^{ 0}\bar\Sigma^{ 0}) < 6.5\times 10^{ -5}$, $\cal{ B}$$(\chi_{ c1}\rightarrow\Sigma^{ +}\bar\Sigma^{ -}) < 8.7\times 10^{ -5}$ and $\cal{ B}$$(\chi_{ c2}\rightarrow\Sigma^{ +}\bar\Sigma^{ -}) < 8.8\times 10^{ -5}$ at the 90% confidence level.
Categories: hep-ex physics.data-an