2022/08/16 by Luo, Xuan, Fu, Hai-Bing, Tian, Hai-Jiang
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)
paper · doi:10.48550/arxiv.2208.07520
The Z-boson decay provides good opportunities for the research on ΞbQ' baryon due to large quantity of Z events that can be collected at the high-energy colliders. We performed a completed investigation of the indirect production of the Ξbc and Ξbb baryon via Z-boson decay Z→ ΞbQ'+ b + Q' with Q'= (c, b) quark according to NRQCD factorizations approach. After considering the contribution of the diquark states ⟨ bc⟩ [3S1] 3/6, ⟨ bc⟩ [1S0] 3/6, ⟨ bb⟩ [1S0]6 and ⟨ bb⟩ [3S1] 3, the calculated branching ratio for Z→ΞbQ'+X are \cal B(Z→Ξbc+X) = 3.595× 10-5 and \cal B(Z→Ξbc+X) = 1.213× 10-6. Moreover, the Ξbc events produced are predicted to be of the 104(107) order at the LHC(CEPC), while the Ξbb events produced are forecasted to be of the 103(106) order. Furthermore, we have estimated the production ratio \cal R(ZQ→Ξ+,0bc) with four Z-boson decay channels. The \cal R(ZQ→Ξ+,0bc) up to 10-6 for Z→ c c channel and 10-5 for Z→ b b channel, respectively. Finally, we present the differential decay widths of Ξbc(Ξbb) with respect to s23 and z distributions, and analysis the uncertainties.