Hadronic Production of the Doubly Heavy Baryon ${\Xi }_{bc}$ at LHC

Abstract

We investigate the hadronic production of the doubly heavy baryon ${\Xi }_{bc}$ at the large hadron collider (LHC), where contributions from the four $(bc)$-diquark states $(bc{)}_{\bar{3},6}{[}^1{S}_0]$ and $(bc{)}_{\bar{3},6}{[}^3{S}_1]$ have been taken into consideration. Numerical results show that under the condition of $p_T>4$ GeV and $|y|<1.5$, sizable ${\Xi }_{bc}$ events about $1.7\times 10^7$ and $3.5\times 10^9$ per year can be produced for the center-of-mass energy $\sqrt{S}=7$ TeV and $\sqrt{S}=14$ TeV respectively. For experimental usage, the total and the interested differential cross-sections are estimated under some typical $p_T$- and $y$- cuts for the LHC detectors CMS, ATLAS and LHCb. Main uncertainties are discussed and a comparative study on the hadronic production of ${\Xi }_{cc}$, ${\Xi }_{bc}$ and ${\Xi }_{bb}$ at LHC are also presented.

Comments: 9 pages, 8 figures, 6 tables. References updated and more discussions are added. To be published in Phys.Rev.D