Excited doubly heavy baryon production via W+ boson decays

In this paper, decay widths of the doubly heavy baryons (Xi(cc) and (Xi(bc)) production are theoretically calculated in the whole phase space through W+-> Xi(cc) + (c) over bar + (s) over bar and W+ -> Xi(bc) + (b) over bar + (s) over bar, within the framework of nonrelativistic QCD (NRQCD). Differential widths d Gamma/ds(12), d Gamma/ds(23), d Gamma/dcos theta(12), and df/dcos theta(13) are also given. In addition to the ordinary S-wave contributions for the baryons, we specifically calculate P-wave contributions as a comparison, namely the high excited states of the intermediate diquark, including [P-1(1)] and [P-1(J)] (with J = 0, 1, 2) in both color antitriplet state (3) over bar and color sextuplet state 6. It shows that the contribution from the P-wave is about one order lower than the S-wave. According to the results, we can expect plentiful events produced at the LHC, i.e., 3.69 x 10(5) Xi(cc) events and 4.91 x 10(4) Xi(bc) events per year.

Automated summary

In this study, the decay widths of doubly heavy baryons were theoretically calculated using nonrelativistic QCD. The results show that the contribution from the P-wave is about one order lower than the S-wave. It is expected that a large number of doubly heavy baryon events will be produced at the LHC.