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Excited doubly heavy baryons production via Higgs decays

Hong-Hao MaJuan-Juan Niu
Dec 2022
摘要
Through the interaction of Higgs with heavy quarks in standard model, we havesystematically studied and predicted the production of excited doubly heavybaryons based on non-relativistic QCD theory. The decay widths, differentialdistributions, and major theoretical uncertainties of the excited doubly heavybaryons via the process $H \rightarrow \langle QQ'\rangle[n] \rightarrow\Xi_{QQ'}+ \bar {Q'} + \bar {Q}$ are discussed in detail. The spin and colorquantum number of the intermediate $P$-wave diquark state $\langleQQ'\rangle[n]$ can be $\langle cc\rangle[^{1}P_{1}]_{\mathbf{\bar 3}}$,$\langle cc\rangle[^{3}P_{J}]_{\mathbf{6}}$, $\langlebc\rangle[^{1}P_{1}]_{\mathbf{\bar 3}/ \mathbf{6}}$, $\langlebc\rangle[^{3}P_{J}]_{\mathbf{\bar 3}/ \mathbf{6}}$, $\langle bb\rangle[^{1}P_{1}]_{\mathbf{\bar 3}}$ and $\langlebb\rangle[^{3}P_{J}]_{\mathbf{6}}$, with $J=0, 1, 2$. The contributions fromall summed $P$-wave states can be about $3.05\%$, $3.23\%$ and $2.19\%$ of the$S$-wave states for the production of $\Xi_{cc}$, $\Xi_{bc}$ and $\Xi_{bb}$,accordingly. Therefore, there will be about 0.41$\times10^4$ events of$\Xi_{cc}$, 6.35$\times10^4$ events of $\Xi_{bc}$ and 0.28$\times10^4$ eventsof $\Xi_{bb}$ produced per year at the HL-LHC, and a smaller number of eventswould be produced at the CEPC or ILC but with a cleaner background to bemeasured by the experiments.
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