Production of Triply Heavy Baryons at LHC

TL;DR

This paper calculates the production rates of triply heavy baryons at LHC, introduces a new method for handling complex Feynman diagrams, and suggests these particles are promising to be discovered with current collider capabilities.

Contribution

It develops an automated method for calculating numerous Feynman diagrams and provides detailed predictions for triply heavy baryon production at LHC.

Findings

10^4-10^5 triply heavy baryons can be produced at LHC with 10 fb^{-1} luminosity.

Identifies promising decay modes for experimental detection.

Concludes discovery of these baryons at LHC is feasible.

Abstract

Triply heavy baryons are very interesting hadrons to be explored for they provide particular information about strong interactions, hadron structures, and weak decays of heavy baryons. We calculate the hadronic production cross sections of the \Omega_{ccc} and the \Omega_{ccb}, which are dominated by the gg fusion subprocesses containing 4362 and 1454 Feynman diagrams, respectively. A method for generating and calculating tree level Feynman diagrams automatically is developed to deal with complicated processes containing so many diagrams. Our results show that 10^4-10^5 events of triply heavy baryons can be accumulated for 10 fb^{-1} integrated luminosity at LHC. Signatures of the triply heavy baryons are pointed out, with emphasis on the decay modes \Omega_{ccc} -> \Omega_{sss} + 3 \pi^+ and \Omega_{ccb} -> \Omega_{sss} + 3 \pi^+ +\pi^-. We conclude that it is quite promising to discover them at LHC.