Journal
PHYSICAL REVIEW D
Volume 105, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.105.034016
Keywords
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Funding
- Natural Science Foundation of China [12005028, 12047564]
- Fundamental Research Funds for the Central Universities [2020CDJQY-Z003]
- China Postdoctoral Science Foundation [2021M693743]
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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.
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.
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