Heavy Baryon Spectroscopy in the Relativistic Quark Model

Фаустов, Р. Н.; Galkin, V. O.

doi:10.3390/particles3010019

“…[72,73] applied the light cone QCD sum rules to study its decays to ground-state bottom baryons and a meson considering the heavy quark effective theory. The consistency of the quantum numbers of the Ξ b (6227) − with a P -wave state with J P = 1 2 − , 3 2 − and 5 2 − was also indicated by mass calculation in the quark-diquark picture [74,75]. In another work made in the quark-diquark picture, the preferable spin of this particle was stated to be J P = 3 2 − [76].…”

Section: Introductionmentioning

confidence: 75%

Determination of the possible quantum numbers for the newly observed $Ξ_b(6227)^0$ state

Azizi,

Sarac,

Sundu

2020

Preprint

1

0

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The LHCb Collaboration recently reported the observation of a new excited bottom baryon Ξ b (6227) 0 and announced an improvement in the measurements related to the previously observed Ξ b (6227) − state. We conduct an analysis for Ξ b (6227) 0 state considering it as isospin partner of the Ξ b (6227) − resonance and possibly 1P or 2S excited state with spin J = 3 2 . The corresponding masses for both possibilities have consistent results with the experimental data, indicating that only with the mass sum rules, one can not make exact decision on the nature and quantum numbers of this state. To go further, the decays of these possible excited states to Ξ − b π + final state are also considered and the relevant strong coupling constants are extracted from the light cone sum rules. The obtained decay width values support the possibility of Ξ b (6227) 0 to be the 1P excited state of Ξ b (5945) 0 baryon.

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“…Only for particles with S = T = 1:5 and S = T = 4:4 is this perturbative energy of order 1 zero, and such particles do not physically exist. Table 4 presents our results as compared to the results from the nonrelativistic method [30] and lattice QCD calculations [31,32]. As observed, there is a good agreement between the two sets of results.…”

Section: Screened Potentialmentioning

confidence: 60%

Investigation of Baryons in the Hypercentral Quark Model

Tazimi

¹

,

Alavijeh

²

2021

Advances in High Energy Physics

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In the present study, we consider baryons as three-body bound systems according to the hypercentral constituent quark model in configuration space and solve the three-body Klein-Gordon equation. Then, we analyze perturbative spin-dependent and isospin-dependent interaction effects. To find the analytical solution, we use screened potential and calculate the eigenfunctions and eigenvalues of some baryons. We consider exclusive semileptonic decays of bottom and charm baryons and apply the differential decay width with the Isgur-Wise function and arrive at the rates for some semileptonic baryon decays. The results prove more enhanced compared to recent works and comply well with the experimental data.

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“…[72,73] applied the light cone QCD sum rules to study its decays to ground-state bottom baryons and a meson considering the heavy quark effective theory. The consistency of the quantum numbers of the Ξ b (6227) − with a P -wave state with J P = 1 2 − , 3 2 − and 5 2 − was also indicated by mass calculation in the quark-diquark picture [74,75]. In another work made in the quark-diquark picture, the preferable spin of this particle was stated to be J P = 3 2 − [76].…”

Section: Introductionmentioning

confidence: 75%

Determination of the possible quantum numbers for the newly observed Ξb(6227)0 state

Azizi

¹

,

Sarac

²

,

Sundu

³

2021

J. High Energ. Phys.

View full text Add to dashboard Cite

The LHCb Collaboration recently reported the observation of a new excited bottom baryon Ξb(6227)0 and announced an improvement in the measurements related to the previously observed Ξb(6227)− state. We conduct an analysis for Ξb(6227)0 state considering it as isospin partner of the Ξb(6227)− resonance and possibly 1P or 2S excited state with spin J = $$ \frac{3}{2} $$ 3 2 . The corresponding masses for both possibilities have consistent results with the experimental data, indicating that only with the mass sum rules, one can not make exact decision on the nature and quantum numbers of this state. To go further, the decays of these possible excited states to $$ {\Xi}_b^{-}{\pi}^{+} $$ Ξ b − π + final state are also considered and the relevant strong coupling constants are extracted from the light cone sum rules. The obtained decay width values support the possibility of Ξb(6227)0 to be the 1P excited state of Ξb(5945)0 baryon.

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Heavy Baryon Spectroscopy in the Relativistic Quark Model

Cited by 17 publications

References 105 publications

Determination of the possible quantum numbers for the newly observed $Ξ_b(6227)^0$ state

Determination of the possible quantum numbers for the newly observed $Ξ_b(6227)^0$ state

Investigation of Baryons in the Hypercentral Quark Model

Determination of the possible quantum numbers for the newly observed Ξb(6227)0 state

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