Predictions of masses for light hybrid baryons
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arXiv
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2024
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| author | Wang, Qi-Nan Lian, Ding-Kun Chen, Wei Yang, Hui-Min Chen, Hua-Xing Ho, J. Steele, T. G. |
| author_facet | Wang, Qi-Nan Lian, Ding-Kun Chen, Wei Yang, Hui-Min Chen, Hua-Xing Ho, J. Steele, T. G. |
| contents | Within the method of parity-projected QCD sum rules, we study the mass spectra of light hybrid baryons with $I(J^{P})=1/2(1/2^{\pm}), 3/2(1/2^{\pm}), 1/2(3/2^{\pm}), 3/2(3/2^{\pm})$ by constructing the local $qqqg$ interpolating currents. We calculate the correlation functions up to dimension eight condensates at the leading order of $α_{s}$. The stable QCD Lapalce sum rules can be established for the positive-parity $N_{1/2^+}, Δ_{3/2^+}, Δ_{1/2^+}$ and negative-parity $N_{1/2^-}, N_{3/2^-}, Δ_{1/2^-}$ channels to extract their mass spectra. The lowest-lying hybrid baryons are predicted to be the positive-parity $N_{1/2^+}$ state around 2.01 GeV. These hybrid baryons mainly decay into conventional baryon plus meson final states. We propose to search for the light hybrid baryons through the $Υ/ψ(3686)$ decays via the three-gluon emission mechanism in BESIII and BelleII experiments. Hopefully our studies of the light hybrid baryons will be useful for understanding the excited baryon spectrum and the behavior of gluonic degrees of freedom in QCD. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_14878 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Predictions of masses for light hybrid baryons Wang, Qi-Nan Lian, Ding-Kun Chen, Wei Yang, Hui-Min Chen, Hua-Xing Ho, J. Steele, T. G. High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice Within the method of parity-projected QCD sum rules, we study the mass spectra of light hybrid baryons with $I(J^{P})=1/2(1/2^{\pm}), 3/2(1/2^{\pm}), 1/2(3/2^{\pm}), 3/2(3/2^{\pm})$ by constructing the local $qqqg$ interpolating currents. We calculate the correlation functions up to dimension eight condensates at the leading order of $α_{s}$. The stable QCD Lapalce sum rules can be established for the positive-parity $N_{1/2^+}, Δ_{3/2^+}, Δ_{1/2^+}$ and negative-parity $N_{1/2^-}, N_{3/2^-}, Δ_{1/2^-}$ channels to extract their mass spectra. The lowest-lying hybrid baryons are predicted to be the positive-parity $N_{1/2^+}$ state around 2.01 GeV. These hybrid baryons mainly decay into conventional baryon plus meson final states. We propose to search for the light hybrid baryons through the $Υ/ψ(3686)$ decays via the three-gluon emission mechanism in BESIII and BelleII experiments. Hopefully our studies of the light hybrid baryons will be useful for understanding the excited baryon spectrum and the behavior of gluonic degrees of freedom in QCD. |
| title | Predictions of masses for light hybrid baryons |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice |
| url | https://arxiv.org/abs/2412.14878 |