Electromagnetic mass differences of SU(3) baryons within a chiral soliton model

Yang, Gi Young; Kim, Hyun-Chul; Polyakov, Maxim V.

doi:10.1016/j.physletb.2010.11.018

Cited by 20 publications

(15 citation statements)

References 36 publications

(90 reference statements)

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“…The corresponding formalisms and analyses in detail can be found in Ref. [23] and Ref. [24], respectively.…”

Section: )mentioning

confidence: 99%

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Hyperon semileptonic decay constants with flavor SU(3) symmetry breaking

Yang

Kim

2015

Phys. Rev. C

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Abstract:We investigate the hyperon semileptonic decay constants, f 2 /f 1 , and g 1 /f 1 , within a general framework of a chiral soliton model. All relevant parameters for the SU(3) baryon wave functions were unambiguously determined by using the experimental data for the masses of the baryon octet and the decuplet. Using then the existing experimental data for the magnetic moments of the baryon octet and the decay constants of hyperon semileptonic decays, we are able to determine all the hyperon semileptonic decay constants f 2 /f 1 and g 1 /f 1 of the baryon octet unequivocally. In addition, we also present the results of the axial-vector transition constants from the baryon decuplet to the octet.

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“…The corresponding formalisms and analyses in detail can be found in Ref. [23] and Ref. [24], respectively.…”

Section: )mentioning

confidence: 99%

“…In Ref. [23], the EM mass differences between baryons in the same isospin multiplet were analyzed within the χSM and the corresponding model parameters were fixed by the experimental data. Together with the isospin symmetry breaking from the mass difference of the up and down quarks, Ref.…”

Section: Introductionmentioning

confidence: 99%

Hyperon semileptonic decay constants with flavor SU(3) symmetry breaking

Yang

Kim

2015

Phys. Rev. C

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“…Another well-known mass formula based on SUð3Þ F for the octet baryons is the Coleman-Glashow (CG) one [1]. Note that the masses of the octet baryons have been intensively studied in the calculations of the lattice QCD (LQCD) [2][3][4][5][6] as well as the theoretical models with the baryon wave functions [7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Mixing effects of Σ0−Λ0 in Λc+ decays

2020

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We analyze the mixing between Σ 0 and Λ 0 based on the baryon masses. We distinguish the contributions from QCD and QED in the baryon mass splittings. We find that the mixing angle between Σ 0 and Λ 0 is ð2.07 AE 0.03Þ × 10 −2 , which leads to the decay branching fraction and up-down asymmetry of Λ þ c → Σ 0 e þ ν e to be BðΛ þ c → Σ 0 e þ ν e Þ ¼ ð1.5 AE 0.2Þ × 10 −5 and αðΛ þ c → Σ 0 e þ ν e Þ ¼ −0.86 AE 0.04, respectively. Moreover, we obtain that ΔB ≡ BðΛ þ c → Σ 0 π þ Þ − BðΛ þ c → Σ þ π 0 Þ ¼ ð3.8 AE 0.5Þ × 10 −4 and Δα ≡ αðΛ þ c → Σ 0 π þ Þ − αðΛ þ c → Σ þ π 0 Þ ¼ ð−1.6 AE 0.7Þ × 10 −2 , which should vanish without the mixing.

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“…Also we found that the coupling of antidecuplet N * to the πN channel is strongly suppressed. As the byproduct of our studies of the ground state baryons in the chiral quark-soliton model, we developed a method to calculate the electromagnetic mass differences in the octet and decuplet of baryons [53]. In this work we showed that the electromagnetic mass differences in the octet and the decuplet are related to each other due to the hedgehog symmetry of the model.…”

Section: Baryons From the Chiral Quark-soliton Picturementioning

confidence: 99%

Neutron anomaly inγN→ηNand the flavour SU(3) symmetry

Polyakov

Goeke

2017

EPJ Web Conf.

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Abstract. We study the implications of the flavour SU(3) symmetry for various interpretations (existence of a narrow anti-decuplet resonance, interference of known resonances and a cusp effect) of the neutron anomaly in γN → ηN cross section. We show that the explanation of the neutron anomaly due to interference of known N(1535) and N(1650) resonances implies that N(1650) resonance should have a huge coupling to φ-meson -at least 5 times larger than the corresponding ρ 0 coupling. In terms of quark degrees of freedom that implies that the well-known N(1650) resonance must be a "cryptoexotic pentaquark"-its wave function should contain predominantly an ss component, implying that the N(1650) resonance is dominantly a pentaquark. The explanation of the neutron anomaly as a cusp effect implies very strong violation of the flavour SU(3) symmetry.

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Electromagnetic mass differences of SU(3) baryons within a chiral soliton model

Cited by 20 publications

References 36 publications

Hyperon semileptonic decay constants with flavor SU(3) symmetry breaking

Hyperon semileptonic decay constants with flavor SU(3) symmetry breaking

Mixing effects of Σ0−Λ0 in Λc+ decays

Neutron anomaly inγN→ηNand the flavour SU(3) symmetry

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