2024/12/19 by Wang, Qi-Nan, Lian, Ding-Kun, Chen, Wei +4
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph)
paper · doi:10.48550/arxiv.2412.14878
Within the method of parity-projected QCD sum rules, we study the mass spectra of light hybrid baryons with I(JP)=1/2(1/2±), 3/2(1/2±), 1/2(3/2±), 3/2(3/2±) by constructing the local qqqg interpolating currents. We calculate the correlation functions up to dimension eight condensates at the leading order of αs. The stable QCD Lapalce sum rules can be established for the positive-parity N1/2+, Δ3/2+, Δ1/2+ and negative-parity N1/2-, N3/2-, Δ1/2- channels to extract their mass spectra. The lowest-lying hybrid baryons are predicted to be the negative-parity N1/2- state around 2.28 GeV and Δ1/2- state around 2.64 GeV. These hybrid baryons mainly decay into conventional baryon plus meson final states. We propose to search for the light hybrid baryons through the χcJ/Υ decays via the three-gluon emission mechanism in BESIII and BelleII experiments. 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.