Mass spectrum, magnetic moments and Regge trajectories of Ωccb and Ωcbb baryons in the nonrelativistic quark–diquark model

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Çakır Ö., Mutuk H.

European Physical Journal C, cilt.86, sa.6, 2026 (SCI-Expanded, Scopus)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 86 Sayı: 6
  • Basım Tarihi: 2026
  • Doi Numarası: 10.1140/epjc/s10052-026-15944-1
  • Dergi Adı: European Physical Journal C
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Chemical Abstracts Core, Compendex, INSPEC, zbMATH, Directory of Open Access Journals, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO), Technology Collection (ProQuest)
  • Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
  • Ondokuz Mayıs Üniversitesi Adresli: Evet

Özet

In this work, we investigate the mass spectra, magnetic moments, and Regge trajectories of the triply heavy baryons Ωccb and Ωcbb within a nonrelativistic constituent quark model based on the quark–diquark approximation, which reduces the three-body problem to an effective two-body system. For each baryon, all three possible diquark clusterings are considered, providing a qualitative indication of the sensitivity of the results to the quark–diquark decomposition. The model parameters are fixed by a fit to the measured Bc meson spectrum, thereby anchoring the baryon predictions to experimentally constrained inputs and establishing a consistent link between the heavy meson and baryon sectors. We obtain ground-state masses of approximately 8.0 GeV for Ωccb and 11.0 GeV for Ωcbb, with radial and orbital excitation patterns in good agreement with the results reported in the literature. The computed magnetic moments of the spin-12 and spin-32 states are consistent with the results of various approaches. A radial Regge analysis in the (nr,M2) plane reveals approximately linear P-wave trajectories and mildly curved S-wave trajectories, with slope and intercept parameters that scale systematically with the heavy-quark content of the baryon. These results suggest that the nonrelativistic quark–diquark framework provides a reliable description of triply heavy baryons and serves as a useful reference for future experimental searches, particularly at LHCb.