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QCD sum rule calculation for P-wave bottom baryons

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arxiv 1510.05267 v2 pith:STYJNPLD submitted 2015-10-18 hep-ph

Qiang Mao , Hua-Xing Chen , Wei Chen , Atsushi Hosaka , Xiang Liu , Shi-Lin Zhu This is my paper · ORCID
classification hep-ph
keywords lambdabaryonbaryonsbottommultipletsp-waveresultsdoublet
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We study the P-wave bottom baryons using the method of QCD sum rule and heavy quark effective theory. Our results suggest that Lambda_b(5912) and Lambda_b(5920) can be well described by the baryon doublet [3F_bar, 1, 1, rho], and they belong to the SU(3) 3F_bar multiplets of J(P)=1/2(-) and 3/2(-). Their SU(3) flavor partners, Xi_b(1/2-) and Xi_b(3/2-), have masses 6.06 \pm 0.13 GeV and 6.07 \pm 0.13 GeV, respectively, with mass splitting 9 \pm 4 MeV. The results obtained using baryon doublet [3F_bar, 1, 0, lambda] are similar and also consistent with the experimental data. We also study the SU(3) 6F multiplets by using the baryon multiplets [6F, 0, 1, lambda], [6_F, 1, 0, rho] and [6F, 2, 1, lambda], and our results suggest that the P-wave bottom baryons Sigma_b, Xi'_b and Omega_b have (averaged) masses about 6.0 GeV, 6.2 GeV and 6.4 GeV, respectively.

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Cited by 2 Pith papers

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  1. Topped baryons from QCD sum rules

    hep-ph 2025-07 conditional novelty 6.0 of 10

    QCD sum rules in HQET predict ground-state singly topped baryon masses near 174 GeV, some 1.1-1.5 GeV above the top quark pole mass.

  2. Strong decay properties of P-wave single bottom baryons of the SU(3) flavor antitriplet $\bf\bar 3_F$

    hep-ph 2024-12 conditional novelty 5.0 of 10

    A systematic light-cone sum-rule calculation of strong decays for P-wave bottom baryons finds eight narrow states, matching several observed resonances.

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