Decay properties of P-wave bottom baryons within light-cone sum rules

Autor: Hui-Min Yang, Hua-Xing Chen, Er-Liang Cui, Atsushi Hosaka, Qiang Mao
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: European Physical Journal C: Particles and Fields, Vol 80, Iss 2, Pp 1-17 (2020)
Druh dokumentu: article
ISSN: 1434-6044
1434-6052
DOI: 10.1140/epjc/s10052-020-7637-z
Popis: Abstract We use the method of light-cone sum rules to study decay properties of P-wave bottom baryons belonging to the SU(3) flavor $$\mathbf {6}_F$$ 6F representation. In Cui et al. (Phys Rev D 99:094021, 2019) we have studied their mass spectrum and pionic decays, and found that the $$\varSigma _{b}(6097)$$ Σb(6097) and $$\varXi _{b}(6227)$$ Ξb(6227) can be well interpreted as P-wave bottom baryons of $$J^P = 3/2^-$$ JP=3/2- . In this paper we further study their decays into ground-state bottom baryons and vector mesons. We propose to search for a new state $$\varXi _b({5/2}^-)$$ Ξb(5/2-) , that is the $$J^P = 5/2^-$$ JP=5/2- partner state of the $$\varXi _{b}(6227)$$ Ξb(6227) , in the $$\varXi _b({5/2}^-) \rightarrow \varXi _b^{*}\rho \rightarrow \varXi _b^{*}\pi \pi $$ Ξb(5/2-)→Ξb∗ρ→Ξb∗ππ decay process. Its mass is $$12 \pm 5$$ 12±5 MeV larger than that of the $$\varXi _{b}(6227)$$ Ξb(6227) .
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