Hadronic production of the doubly charmed baryon via the proton-nucleus and the nucleus-nucleus collisions at the RHIC and LHC

Abstract

We present a detailed discussion on the doubly charmed baryon ${\Xi }_{cc}$ production at the RHIC and LHC via the proton-nucleus ($p$-N) and nucleus-nucleus (N-N) collision modes. The extrinsic charm mechanism via the subprocesses $g+c\to (cc)[n]+\bar{c}$ and $c+c\to (cc)[n]+g$ together with the gluon-gluon fusion mechanism via the subprocess $g+g\to (cc)[n]+\bar{c}+\bar{c}$ have been taken into consideration, where the intermediate diquark is in $[n]={[}^1{S}_0{]}_6$-state or ${[}^3{S}_1{]}_{\bar{3}}$-state, respectively. Total and differential cross sections have been discussed under various collision energies. To compare with the ${\Xi }_{cc}$ production via proton-proton collision mode at the LHC, we observe that sizable ${\Xi }_{cc}$ events can also be generated via $p$-N and N-N collision modes at the RHIC and LHC. For examples, about $8.1\times 10^7$ and $6.7\times 10^7$ ${\Xi }_{cc}$ events can be accumulated in $p$-Pb and Pb-Pb collision modes at the LHC within one operation year.

Comments: 10 pages, 6 figures