Radiative decays of the 1 P , 1 D , 2 S , and 2 P     Λ c and 1 D , 2 S , and 2 P     Ξ c charmed baryons

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Abstract
We analyze the radiative decays of the 1 P , 1 D , 2 S , and 2 P Λ c and 1 D , 2 S , and 2 P Ξ c charmed baryons, belonging to the flavor antitriplet ( 3 ¯ F ), using the constituent quark model. We compute electromagnetic transitions from ground and P -wave states to ground states, as well as from second-shell states to both ground and P -wave final states. Electromagnetic decay widths are especially valuable for identifying resonances when multiple states share similar mass and total decay width. We give branching ratios of several electromagnetic decay widths that can confirm the assignment of the Ξ c ( 3055 ) reported by LHCb. Likewise, we provide branching-ratio predictions that can help guide the assignment of the Ξ c ( 3080 ) states, and discuss their possible interpretation either as 1 D states with J P = 5 / 2 + or as 2 S states with J P = 1 / 2 + . For the first time, this work provides calculations of electromagnetic decays for D ρ -wave states, ρ − λ mixed configurations, and ρ -mode radially excited states in singly charmed baryons of the flavor antitriplet. Both experimental and model-dependent uncertainties are taken into account throughout our analysis.
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  • Secretaría de Ciencia, Humanidades, Tecnología e Innovación
  • Universidad Autónoma de Zacatecas (CBF-2026-310)

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