Article,

Production of charmed baryon \$Łambda\_c(2940)^+\$ at PANDA

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(Sep 26, 2011)

Abstract

In this work we evaluate the production rate of the charmed baryon \$Łambda\_c(2940)^+\$ at PANDA. For possible assignments of \$Łambda\_c(2940)^+\$: \$J^P=1/2^\pm\$, \$3/2^\pm\$ and \$5/2^\pm\$, the total cross section of \$pp\to Łambda\_c Łambda\_c(2940)^+\$ is estimated, which may exceed 1 nb. With the designed luminosity (\$2\times10^-32\$cm\$^-2\$/s) of PANDA, our estimate indicates that ten thousand events per day if \$Łambda\_c(2940)^+\$ is of \$J^P=1/2^+\$ or \$10^8\$ per day if it is of \$J^P=5/2^+\$ can be expected. Those values actually set the lower and upper limits of the \$Łambda\_c(2940)^+\$ production. In addition, we present the Dalitz plot and carry out a rough background analysis of the \$Łambda\_c(2940)^+\$ production in the \$pp\to D^0 pŁambda\_c\$ and \$pp\Sigma\_c^0,++\pi^+,-Łambda\_c\$ processes, which would provide valuable information for accurate determination of the \$Łambda\_c(2940)^+\$ identity.

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