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arXiv · 2005.06772

New $Λ_b(6072)^0$ state as a $2S$ bottom baryon

K. Azizi·Y. Sarac·H. Sundu
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Abstract

As a result of continuous developments, the recent experimental searches lead to the observations of new particles at different hadronic channels. Among these hadrons are the excited states of the heavy baryons containing single bottom or charmed quark in their valance quark content. The recently observed $Λ_b(6072)^0$ state is one of these baryons and possibly $2S$ radial excitation of the $Λ_b$ state. Considering this information from the experiment, we conduct a QCD sum rule analysis on this state and calculate its mass and current coupling constant considering it as a $2S$ radially excited $Λ_b$ resonance. For completeness, in the analyses, we also compute the mass and current coupling constant for the ground state $Λ_b^0$ and its first orbital excitation. We also consider the $Λ_c^+$ counterpart of each state and attain their mass, as well. The obtained results are consistent with the experimental data as well as existing theoretical predictions.

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K. Azizi, Y. Sarac, H. Sundu. 2020-08-08. New $Λ_b(6072)^0$ state as a $2S$ bottom baryon. https://doi.org/10.1103/physrevd.102.034007

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