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Radiative decays of the 1P, 1D, 2S, and 2P  Λc and 1D, 2S, and 2P  Ξc charmed baryons

R. Gamboa-Goni and H. García-Tecocoatzi*

Ailier Rivero-Acosta†

A. Gutierrez-Rodriguez and A. Ramirez-Morales

E. Santopinto

Carlos Alberto Vaquera-Araujo

  • Departamento de Física, DCI, Campus León, Universidad de Guanajuato, Loma del Bosque 103, Lomas del Campestre, 37150, León, Guanajuato, Mexico and INFN, Sezione di Genova, Via Dodecaneso 33, 16146 Genova, Italy

  • *Contact author: hugo.garcia.t@tec.mx
  • †Contact author: ailierrivero@gmail.com

Phys. Rev. D 114, 036020 – Published 17 August, 2026

DOI: https://doi.org/10.1103/3c6s-dw2q

Abstract

We analyze the radiative decays of the 1P, 1D, 2S, and 2P  Λc and 1D, 2S, and 2P  Ξc 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 Ξc(3055) reported by LHCb. Likewise, we provide branching-ratio predictions that can help guide the assignment of the Ξc(3080) states, and discuss their possible interpretation either as 1D states with JP=5/2+ or as 2S states with JP=1/2+. For the first time, this work provides calculations of electromagnetic decays for Dρ-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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References (109)

  1. Medina Ablikim et al., Determination of the Λc+ spin via the reaction e+e−→Λc+Λ¯c−, Phys. Rev. D 103, L091101 (2021).
  2. T. J. Moon et al., First determination of the spin and parity of the charmed-strange baryon Ξc(2970)+, Phys. Rev. D 103, L111101 (2021).
  3. Roel Aaij et al., First determination of the spin-parity of Ξc(3055)+,0 baryons, Phys. Rev. Lett. 134, 081901 (2025).
  4. Roel Aaij et al., Observation of excited Ωc0 baryons in Ωb−→Ξc+K−π− decays, Phys. Rev. D 104, L091102 (2021).
  5. Bernard Aubert et al., Measurements of B(B¯0→Λc+p¯) and B(B¯−→Λc+p¯π−) and studies of Λc+π− resonances, Phys. Rev. D 78, 112003 (2008).
  6. A. Dávila-Rivera, H. García-Tecocoatzi, A. Ramirez-Morales, Ailier Rivero-Acosta, E. Santopinto, and Carlos Alberto Vaquera-Araujo, Radiative decays of the Σc, Ξc′, and Ωc charmed baryons, Phys. Rev. D 113, 093001 (2026).
  7. Eberhard Klempt and Jean-Marc Richard, Baryon spectroscopy, Rev. Mod. Phys. 82, 1095 (2010).
  8. Hai-Yang Cheng, Charmed baryon physics circa 2021, Chin. J. Phys. 78, 324 (2022).
  9. Hua-Xing Chen, Wei Chen, Xiang Liu, Yan-Rui Liu, and Shi-Lin Zhu, A review of the open charm and open bottom systems, Rep. Prog. Phys. 80, 076201 (2017).
  10. E. G. Cazzoli, A. M. Cnops, P. L. Connolly, R. I. Louttit, M. J. Murtagh, R. B, Palmer, N. P. Samios, T. T. Tso, and H. H. Williams, Evidence for ΔS=−ΔQ currents or charmed-baryon production by neutrinos, Phys. Rev. Lett. 34, 1125 (1975).
  11. B. Knapp et al., Observation of a narrow antibaryon state at 2.26  GeV/c2, Phys. Rev. Lett. 37, 882 (1976).
  12. M. Calicchio et al., First observation of the production and decay of the Σc+, Phys. Lett. 93B, 521 (1980).
  13. S. F. Biagi et al., Observation of a narrow state at 2.46  GeV/c2: A candidate for the charmed strange baryon A+, Phys. Lett. 122B, 455 (1983).
  14. S. F. Biagi et al., Properties of the charmed strange baryon A+ and evidence for the charmed doubly strange baryon T0 at 2.74  GeV/c2, Z. Phys. C 28, 175 (1985).
  15. H. Albrecht et al., Observation of a new charmed baryon, Phys. Lett. B 317, 227 (1993).
  16. K. W. Edwards et al., Observation of excited charmed baryon states decaying to Λc+π+π−, Phys. Rev. Lett. 74, 3331 (1995).
  17. H. Albrecht et al., Evidence for Λc(2593)+ production, Phys. Lett. B 402, 207 (1997).
  18. J. P. Alexander et al., Evidence of new states decaying into Ξc*π, Phys. Rev. Lett. 83, 3390 (1999).
  19. M. Artuso et al., Observation of new states decaying into Λc+π−π+, Phys. Rev. Lett. 86, 4479 (2001).
  20. S. E. Csorna et al., Evidence of new states decaying into Ξc′π, Phys. Rev. Lett. 86, 4243 (2001).
  21. R. Chistov et al., Observation of new states decaying into Λc+K−π+ and Λc+KS0π−, Phys. Rev. Lett. 97, 162001 (2006).
  22. T. Lesiak et al., Measurement of masses of the Ξc(2645) and Ξc(2815) baryons and observation of Ξc(2980)→Ξc(2645)π, Phys. Lett. B 665, 9 (2008).
  23. T. Aaltonen et al., Measurements of the properties of Λc(2595), Λc(2625), Σc(2455), and Σc(2520) baryons, Phys. Rev. D 84, 012003 (2011).
  24. R. Aaij et al. (LHCb Collaboration), Observation of five new narrow Ωc0 states decaying to Ξc+K−, Phys. Rev. Lett. 118, 182001 (2017).
  25. J. Yelton et al., Observation of excited Ωc charmed baryons in e+e− collisions, Phys. Rev. D 97, 051102 (2018).
  26. R. Aaij et al. (LHCb Collaboration), Observation of new Ξc0 baryons decaying to Λc+K−, Phys. Rev. Lett. 124, 222001 (2020).
  27. R. Aaij et al. (LHCb Collaboration), Observation of new Ωc0 states decaying to the Ξc+K− final state, Phys. Rev. Lett. 131, 131902 (2023).
  28. Roel Aaij et al., Observation of a new charmed baryon decaying to Ξc+π−π+, Phys. Rev. Lett. 135, 161901 (2025).
  29. S. Groote, J. G. Korner, and Oleg I. Yakovlev, QCD sum rules for heavy baryons at next-to-leading order in αs, Phys. Rev. D 55, 3016 (1997).
  30. S. M. Gerasyuta and D. V. Ivanov, Charmed baryons in bootstrap quark model, Nuovo Cimento A 112, 261 (1999).
  31. Dao-Wei Wang and Ming-Qiu Huang, Excited heavy baryon masses to order ΛQCD/mQ from QCD sum rules, Phys. Rev. D 68, 034019 (2003).
  32. Zachary S. Brown, William Detmold, Stefan Meinel, and Kostas Orginos, Charmed bottom baryon spectroscopy from lattice QCD, Phys. Rev. D 90, 094507 (2014).
  33. M. Padmanath, Robert G. Edwards, Nilmani Mathur, and Michael Peardon, Excited-state spectroscopy of singly, doubly and triply-charmed baryons from lattice QCD, In 6th International Workshop on Charm Physics (SLAC National Accelerator Laboratory, Menlo Park, CA, 2013), p. 11.
  34. Huseyin Bahtiyar, Kadir Utku Can, Guray Erkol, Philipp Gubler, Makoto Oka, and Toru T. Takahashi, Charmed baryon spectrum from lattice QCD near the physical point, Phys. Rev. D 102, 054513 (2020).
  35. Hui-Min Yang and Hua-Xing Chen, P-wave charmed baryons of the SU(3) flavor 6F, Phys. Rev. D 104, 034037 (2021).
  36. Ji-Hai Pan and Jisi Pan, Investigation of the mass spectra of singly heavy baryons ΣQ, ΞQ′, and ΩQ (Q=c, b) in the Regge trajectory model, Phys. Rev. D 109, 076010 (2024).
  37. Guo-Liang Yu, Zhen-Yu Li, Zhi-Gang Wang, Jie Lu, and Meng Yan, Systematic analysis of single heavy baryons ΛQ, ΣQ and ΩQ, Nucl. Phys. B990, 116183 (2023).
  38. Zhi-Gang Wang, Fei Lu, and Yang Liu, Analysis of the D-wave Σ-type charmed baryon states with the QCD sum rules, Eur. Phys. J. C 83, 689 (2023).
  39. Francisco O. Duraes and Marina Nielsen, QCD sum rules study of Ξc and Ξb baryons, Phys. Lett. B 658, 40 (2007).
  40. Dan Pirjol and Tung-Mow Yan, Predictions for s-wave and p-wave heavy baryons from sum rules and constituent quark model. 1. Strong interactions, Phys. Rev. D 56, 5483 (1997).
  41. George Chiladze and Adam F. Falk, Phenomenology of new baryons with charm and strangeness, Phys. Rev. D 56, R6738 (1997).
  42. Salam Tawfiq, Patrick J. O’Donnell, and J. G. Korner, Charmed baryon strong coupling constants in a light front quark model, Phys. Rev. D 58, 054010 (1998).
  43. Mikhail A. Ivanov, J. G. Korner, Valery E. Lyubovitskij, and A. G. Rusetsky, One pion charm baryon transitions in a relativistic three quark model, Phys. Lett. B 442, 435 (1998).
  44. C. Albertus, E. Hernandez, J. Nieves, and J. M. Verde-Velasco, Study of the strong Σc→Λcπ, Σc*→Λcπ and Ξc*→Ξcπ decays in a nonrelativistic quark model, Phys. Rev. D 72, 094022 (2005).
  45. Hai-Yang Cheng and Chun-Khiang Chua, Strong decays of charmed baryons in heavy hadron chiral perturbation theory, Phys. Rev. D 75, 014006 (2007).
  46. Xin-Heng Guo, Ke-Wei Wei, and Xing-Hua Wu, Strong decays of heavy baryons in Bethe-Salpeter formalism, Phys. Rev. D 77, 036003 (2008).
  47. Dan-Dan Ye, Ze Zhao, and Ailin Zhang, Study of P-wave excitations of observed charmed strange baryons, Phys. Rev. D 96, 114009 (2017).
  48. Ze Zhao, Dan-Dan Ye, and Ailin Zhang, Hadronic decay properties of newly observed Ωc baryons, Phys. Rev. D 95, 114024 (2017).
  49. Hui-Min Yang and Hua-Xing Chen, 2P-wave charmed baryons from QCD sum rules, Phys. Rev. D 109, 036032 (2024).
  50. Guo-Liang Yu, Yan Meng, Zhen-Yu Li, Zhi-Gang Wang, and Lu Jie, Strong decay properties of single heavy baryons ΛQ, ΣQ and ΩQ, Int. J. Mod. Phys. A 38, 2350082 (2023).
  51. Yi-Jie Wang, Xuan Luo, Hua-Xing Chen, Er-Liang Cui, Wei-Han Tan, and Zhi-Yong Zhou, Strong decay properties of P-wave single bottom baryons of the SU(3) flavor antitriplet 3¯F, Phys. Rev. D 111, 076003 (2025).
  52. Andrew E. Blechman, Adam F. Falk, Dan Pirjol, and John M. Yelton, Threshold effects in excited charmed baryon decays, Phys. Rev. D 67, 074033 (2003).
  53. P. G. Ortega, D. R. Entem, and F. Fernandez, Quark model description of the Λc(2940)+ as a molecular D*N state and the possible existence of theΛb(6248), Phys. Lett. B 718, 1381 (2013).
  54. Hai-Yang Cheng and Chun-Khiang Chua, Strong decays of charmed baryons in heavy hadron chiral perturbation theory: An update, Phys. Rev. D 92, 074014 (2015).
  55. T. M. Aliev, K. Azizi, and H. Sundu, On the nature of Ξc(2930), Eur. Phys. J. A 54, 159 (2018).
  56. Qi-Fang Lü, Canonical interpretations of the newly observed Ξc(2923)0, Ξc(2939)0, and Ξc(2965)0 resonances, Eur. Phys. J. C 80, 921 (2020).
  57. Bing Chen, Si-Qiang Luo, and Xiang Liu, Universal behavior of mass gaps existing in the single heavy baryon family, Eur. Phys. J. C 81, 474 (2021).
  58. Zi-Le Zhang, Zhan-Wei Liu, Si-Qiang Luo, Fu-Lai Wang, Bo Wang, and Hao Xu, Λc(2910) and Λc(2940) as conventional baryons dressed with the D*N channel, Phys. Rev. D 107, 034036 (2023).
  59. C. P. Jessop et al., Observation of two narrow states decaying into Ξc+γ and Ξc0γ, Phys. Rev. Lett. 82, 492 (1999).
  60. Bernard Aubert et al., Observation of an excited charm baryon Ωc* decaying to Ωc0γ, Phys. Rev. Lett. 97, 232001 (2006).
  61. E. Solovieva et al., Study of Ωc0 and Ωc*0 Baryons at Belle, Phys. Lett. B 672, 1 (2009).
  62. J. Yelton et al., Study of electromagnetic decays of orbitally excited Ξc baryons, Phys. Rev. D 102, 071103 (2020).
  63. Hai-Yang Cheng, Chi-Yee Cheung, Guey-Lin Lin, Y. C. Lin, Tung-Mow Yan, and Hoi-Lai Yu, Chiral lagrangians for radiative decays of heavy hadrons, Phys. Rev. D 47, 1030 (1993).
  64. M. C. Bañuls, A. Pich, and I. Scimemi, Electromagnetic decays of heavy baryons, Phys. Rev. D 61, 094009 (2000).
  65. Nan Jiang, Xiao-Lin Chen, and Shi-Lin Zhu, Electromagnetic decays of the charmed and bottom baryons in chiral perturbation theory, Phys. Rev. D 92, 054017 (2015).
  66. Guang-Juan Wang, Lu Meng, and Shi-Lin Zhu, Radiative decays of the singly heavy baryons in chiral perturbation theory, Phys. Rev. D 99, 034021 (2019).
  67. Shi-Lin Zhu and Yuan-Ben Dai, Radiative decays of heavy hadrons from light-cone QCD sum rules in the leading order of HQET, Phys. Rev. D 59, 114015 (1999).
  68. Zhi-Gang Wang, Analysis of the vertexes ΞQ*ΞQ′V, ΣQ*ΣQV and radiative decays ΞQ*→ΞQ′γ, ΣQ*→ΣQγ, Eur. Phys. J. A 44, 105 (2010).
  69. Zhi-Gang Wang, Analysis of the vertices ΩQ*ΩQϕ and radiative decays ΩQ*→ΩQγ, Phys. Rev. D 81, 036002 (2010).
  70. T. M. Aliev, K. Azizi, and A. Ozpineci, Radiative decays of the heavy flavored baryons in light cone QCD sum rules, Phys. Rev. D 79, 056005 (2009).
  71. T. M. Aliev, M. Savc𝚤, and V. S. Zamiralov, Vector meson dominance and radiative decays of heavy spin-3/2 baryons to heavy spin-1/2 baryons, Mod. Phys. Lett. A 27, 1250054 (2012).
  72. T. M. Aliev, K. Azizi, and H. Sundu, Radiative ΩQ*→ΩQγ and ΞQ*→ΞQ′γ transitions in light cone QCD, Eur. Phys. J. C 75, 14 (2015).
  73. T. M. Aliev, T. Barakat, and M. Savc𝚤, Analysis of the radiative decays ΣQ→ΛQγ and ΞQ′→ΞQγ in light cone sum rules, Phys. Rev. D 93, 056007 (2016).
  74. A. Bernotas and V. Šimonis, Radiative M1 transitions of heavy baryons in the bag model, Phys. Rev. D 87, 074016 (2013).
  75. Zalak Shah, Kaushal Thakkar, Ajay Kumar Rai, and P. C. Vinodkumar, Mass spectra and Regge trajectories of Λc+, Σc0, Ξc0 and Ωc0 baryons, Chin. Phys. C 40, 123102 (2016).
  76. Keval Gandhi, Zalak Shah, and Ajay Kumar Rai, Spectrum of nonstrange singly charmed baryons in the constituent quark model, Int. J. Theor. Phys. 59, 1129 (2020).
  77. Keval Gandhi and Ajay Kumar Rai, Spectrum of strange singly charmed baryons in the constituent quark model, Eur. Phys. J. Plus 135, 213 (2020).
  78. Ghil-Seok Yang and Hyun-Chul Kim, Magnetic transitions and radiative decays of singly heavy baryons, Phys. Lett. B 801, 135142 (2020).
  79. June-Young Kim, Hyun-Chul Kim, Ghil-Seok Yang, and Makoto Oka, Electromagnetic transitions of the singly charmed baryons with spin 3/2, Phys. Rev. D 103, 074025 (2021).
  80. Chi-Keung Chow, Radiative decays of excited ΛQ baryons in the bound state picture, Phys. Rev. D 54, 3374 (1996).
  81. D. Gamermann, C. E. Jiménez-Tejero, and A. Ramos, Radiative decays of dynamically generated charmed baryons, Phys. Rev. D 83, 074018 (2011).
  82. Shi-Lin Zhu, Strong and electromagnetic decays of p-wave heavy baryonsΛc1, Λc1*, Phys. Rev. D 61, 114019 (2000).
  83. Xuan Luo, Yi-Jie Wang, and Hua-Xing Chen, P-wave single charmed baryons of the SU(3) flavor 3¯F, Phys. Rev. D 111, 094039 (2025).
  84. Xuan Luo, Hua-Xing Chen, Er-Liang Cui, Hui-Min Yang, Dan Zhou, and Zhi-Yong Zhou, Radiative decays of P-wave charmed baryons in the SU(3) flavor 6F representation, Phys. Rev. D 112, 096028 (2025).
  85. Roelof Bijker, Hugo García-Tecocoatzi, Alessandro Giachino, Emmanuel Ortiz-Pacheco, and Elena Santopinto, Masses and decay widths of Ξc/b and Ξc/b’ baryons, Phys. Rev. D 105, 074029 (2022).
  86. Emmanuel Ortiz-Pacheco and Roelof Bijker, Masses and radiative decay widths of S- and P-wave singly, doubly, and triply heavy charm and bottom baryons, Phys. Rev. D 108, 054014 (2023).
  87. H. García-Tecocoatzi, A. Ramirez-Morales, A. Rivero-Acosta, E. Santopinto, and C. A. Vaquera-Araujo, Ξc(2790)+/0 and Ξc(2815)+/0 radiative decays, Phys. Lett. B 868, 139666 (2025).
  88. Kai-Lei Wang, Li-Ye Xiao, Xian-Hui Zhong, and Qiang Zhao, Understanding the newly observed Ωc states through their decays, Phys. Rev. D 95, 116010 (2017).
  89. Kai-Lei Wang, Ya-Xiong Yao, Xian-Hui Zhong, and Qiang Zhao, Strong and radiative decays of the low-lying S- and P-wave singly heavy baryons, Phys. Rev. D 96, 116016 (2017).
  90. Ya-Xiong Yao, Kai-Lei Wang, and Xian-Hui Zhong, Strong and radiative decays of the low-lying D-wave singly heavy baryons, Phys. Rev. D 98, 076015 (2018).
  91. Yu-Xin Peng, Si-Qiang Luo, and Xiang Liu, Refining radiative decay studies in singly heavy baryons, Phys. Rev. D 110, 074034 (2024).
  92. M. A. Ivanov, J. G. Körner, and V. E. Lyubovitskij, One-photon transitions between heavy baryons in a relativistic three-quark model, Phys. Lett. B 448, 143 (1999).
  93. M. A. Ivanov, J. G. Körner, V. E. Lyubovitskij, and A. G. Rusetsky, Strong and radiative decays of heavy flavored baryons, Phys. Rev. D 60, 094002 (1999).
  94. Salam Tawfiq, J. G. Körner, and Patrick J. O’Donnell, Electromagnetic transitions of heavy baryons in the SU(2Nf)⊗O(3) symmetry, Phys. Rev. D 63, 034005 (2001).
  95. M. Ferraris, M. M. Giannini, M. Pizzo, E. Santopinto, and L. Tiator, A three body force model for the baryon spectrum, Phys. Lett. B 364, 231 (1995).
  96. E. Santopinto, F. Iachello, and M. M. Giannini, Exactly solvable models of baryon spectroscopy, Nucl. Phys. A623, 100C (1997).
  97. E. Santopinto, F. Iachello, and M. M. Giannini, Nucleon form-factors in a simple three-body quark model, Eur. Phys. J. A 1, 307 (1998).
  98. M. M. Giannini and E. Santopinto, The hypercentral constituent quark model and its application to baryon properties, Chin. J. Phys. 53, 020301 (2015).
  99. F. E. Close and L. A. Copley, Electromagnetic interactions of weakly bound composite systems, Nucl. Phys. B19, 477 (1970).
  100. H. García-Tecocoatzi, A. Giachino, A. Ramirez-Morales, Ailier Rivero-Acosta, E. Santopinto, and Carlos Alberto Vaquera-Araujo, Strong decay widths and mass spectra of the 1D, 2P and 2S singly bottom baryons, Phys. Rev. D 110, 114005 (2024).
  101. Ailier Rivero-Acosta, H. García-Tecocoatzi, A. Ramirez-Morales, E. Santopinto, and Carlos Alberto Vaquera-Araujo, Radiative decays of the second shell Λb and Ξb bottom baryons, Phys. Rev. D 112, 072014 (2025).
  102. H. Garcia-Tecocoatzi, A. Giachino, J. Li, A. Ramirez-Morales, and E. Santopinto, Strong decay widths and mass spectra of charmed baryons, Phys. Rev. D 107, 034031 (2023).
  103. S. Navas et al., Review of particle physics, Phys. Rev. D 110, 030001 (2024).
  104. E. Santopinto, A. Giachino, J. Ferretti, H. García-Tecocoatzi, M. A, Bedolla, R. Bijker, and E. Ortiz-Pacheco, The Ωc-puzzle solved by means of quark model predictions, Eur. Phys. J. C 79, 1012 (2019).
  105. Alessandro Giachino, Multiquark states and exotic spectroscopy, PhD thesis, Universita’ Di Genova, Genoa U., 2020.
  106. Ailier Rivero Acosta, Study of heavy baryons phenomenology, PhD thesis, Università degli studi di Genova, Italy and Universidad de Guanajuato, Mexico, 2025.
  107. F. James and M. Roos, Minuit: A system for function minimization and analysis of the parameter errors and correlations, Comput. Phys. Commun. 10, 343 (1975).
  108. Charles R. Harris et al., Array programming with NumPy, Nature (London) 585, 357 (2020).
  109. Bing Chen, Xiang Liu, and Ailin Zhang, Newly observed Λc(2860)+ at LHCb and its D-wave partners Λc(2880)+, Ξc(3055)+ and Ξc(3080)+, Phys. Rev. D 95, 074022 (2017).

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