Inclusive approach to hunt for the beauty-charmed baryons ${\Xi }_{bc}$

Abstract

With a distinctive internal structure from all established hadrons, the beauty-charmed baryons ${\Xi }_{bc}$ can provide us with new points of view to decipher the strong interaction. In this work, we point out that the inclusive ${\Xi }_{bc}\to {\Xi }_{cc}^{++}+X$ decay is a golden channel for the experimental discovery of ${\Xi }_{bc}$ at the LHC. A unique feature of this process is that the ${\Xi }_{cc}^{++}$ is displaced, which greatly reduces the combinatorial background. A feasibility analysis is performed on the ${\Xi }_{bc}^{+}$ search, which is expected to have a longer lifetime than ${\Xi }_{bc}^0$ and thus a better displacement resolution. The ${\Xi }_{bc}^{+}\to {\Xi }_{cc}^{++}+X$ branching ratio is calculated within the heavy diquark effective theory. Combining the ${\Xi }_{bc}$ production rate and the ${\Xi }_{cc}^{++}$ detection efficiency, we anticipate that hundreds of signal events will be collected during LHCb Run 3.

arXiv comment6 pages, 3 figures

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