Excited doubly heavy baryons production via Higgs decays

Abstract

Through the interaction of Higgs with heavy quarks in standard model, we have systematically studied and predicted the production of excited doubly heavy baryons based on non-relativistic QCD theory. The decay widths, differential distributions, and major theoretical uncertainties of the excited doubly heavy baryons via the process $$H \rightarrow \langle QQ'\rangle [n] \rightarrow \Xi _{QQ'}+ \bar{Q'} + \bar{Q}$$ H → ⟨ Q Q ′ ⟩ [ n ] → Ξ Q Q ′ + Q ′ ¯ + Q ¯ are discussed in detail. The spin and color quantum number of the intermediate P-wave diquark state $$\langle QQ'\rangle [n]$$ ⟨ Q Q ′ ⟩ [ n ] can be $$\langle cc\rangle [^{1}P_{1}]_{\varvec{\bar{3}}}$$ ⟨ c c ⟩ [ 1 P 1 ] 3 ¯ , $$\langle cc\rangle [^{3}P_{J}]_{\varvec{6}}$$ ⟨ c c ⟩ [ 3 P J ] 6 , $$\langle bc\rangle [^{1}P_{1}]_{\varvec{\bar{3}}/ \textbf{6}}$$ ⟨ b c ⟩ [ 1 P 1 ] 3 ¯ / 6 , $$\langle bc\rangle [^{3}P_{J}]_{\varvec{\bar{3}}/ \textbf{6}}$$ ⟨ b c ⟩ [ 3 P J ] 3 ¯ / 6 , $$\langle bb \rangle [^{1}P_{1}]_{\varvec{\bar{3}}}$$ ⟨ b b ⟩ [ 1 P 1 ] 3 ¯ and $$\langle bb\rangle [^{3}P_{J}]_{\textbf{6}}$$ ⟨ b b ⟩ [ 3 P J ] 6 , with $$J=0, 1, 2$$ J = 0 , 1 , 2 . The contributions from all summed P-wave states can be about $$3.05\%$$ 3.05 % , $$3.23\%$$ 3.23 % and $$2.19\%$$ 2.19 % of the S-wave states for the production of $$\Xi _{cc}$$ Ξ cc , $$\Xi _{bc}$$ Ξ bc and $$\Xi _{bb}$$ Ξ bb , accordingly. Therefore, there will be about 0.41$$\times 10^4$$ × 10 4 events of $$\Xi _{cc}$$ Ξ cc , 6.35$$\times 10^4$$ × 10 4 events of $$\Xi _{bc}$$ Ξ bc and 0.28$$\times 10^4$$ × 10 4 events of $$\Xi _{bb}$$ Ξ bb produced per year at the HL-LHC, and a smaller number of events would be produced at the CEPC or ILC but with a cleaner background to be measured by the experiments.

Paired Double Heavy Baryons Production in Decays of the Higgs Boson

“…At the same time, an analysis of various decay mechanisms was performed. In recent papers [15,16], the production of doubly heavy single baryons in the decay of the Higgs boson has also been studied within the framework of the quark-gluon decay mechanism. This work continues our previous studies [12,13] of rare exclusive decays of the Higgs boson.…”

Production of excited doubly heavy baryons at the super-Z factory

“…In the perturbative region, the production mainly consists of a diquark state Q Q [n] + X , where [n] is the spin and color quantum number of the diquark Q Q . Usually, direct production mechanisms such as strong production [8][9][10][11] dominate the diquark production, supported by additional direct production mechanisms such as photon production [11][12][13][14] and electron-positron production [15][16][17], as well as indirect production mechanisms [18][19][20][21][22][23]. In the non-perturbative region, the hadronization of the diquark to the doubly heavy baryon is primarily involved.…”