Abstract
We use the method of light-cone sum rules to study the electromagnetic transition of the $\Xi^{*++}_{cc}$ into $\Xi^{++}_{cc}\gamma$, whose decay width is estimated to be $13.7~{^{+17.7}_{-~7.9}}$ keV. This value is large enough for the $\Xi^{*++}_{cc}$ to be observed in the $\Xi^{++}_{cc}\gamma$ channel, and we propose to continually search for it in future LHCb and BelleII experiments.
Highlights
The doubly heavy baryons provide an ideal platform to study the heavy quark symmetry, and have been investigated in various experimental and theoretical studies during the past three decades [1]
We use the method of light-cone sum rules to study the electromagnetic transition of the ΞÃccþþ into Ξþccþγ, whose decay width is estimated to be 13.7þ−71.79.7 keV
The doubly heavy baryon Ξþccþð3621Þ was discovered by the LHCb collaboration in the Λþc K−πþπþ mass spectrum [10], which channel was previously suggested by Yu et al in Ref. [11]
Summary
The doubly heavy baryons provide an ideal platform to study the heavy quark symmetry, and have been investigated in various experimental and theoretical studies during the past three decades [1]. This has been investigated and the decay width of ΞÃccþþ → Ξþccþγ was evaluated to be a few or tens of keV when using various phenomenological models [16,17,18,19,20,21] Very probably, these values are much larger than the weak decay width of the ΞÃccþþ, making it possible and promising to search for the ΞÃccþþ in the Ξþccþγ channel. To further verify the above results, in this paper we use the method of light-cone sum rules to study the electromagnetic transition of the ΞÃccþþ into Ξþccþγ, based on our previous study on the mass spectrum of doubly charmed baryons using QCD sum rules [22].
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