Magnetic moments of negative parity baryons from the effective Hamiltonian approach to QCD

Narodetskii, I.M.; Trusov, M. A.

doi:10.1134/s0021364014020088

Cited by 10 publications

(14 citation statements)

References 15 publications

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“…The very first effort in measuring the magnetic moment of the Δ þ ð1232Þ in the reaction γp → pπ 0 γ has been realized at MAMI, and a future program to get information about the magnetic moment of the N Ã ð1535Þ baryon in the reaction γp → pηγ has already been planned. The magnetic moments of the spin-1=2 negative parity baryons have been calculated within the nonrelativistic quark model [6], simple quark model [7], lattice QCD [8], chiral perturbation theory [9], light cone QCD sum rules (LCSR) [10], and effective Hamiltonian model [11].…”

Section: Introductionmentioning

confidence: 99%

Magnetic moments ofJP=32−baryons in QCD

Aliev

Savcı

2014

Phys. Rev. D

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The magnetic moments of the low lying, negative parity, spin-3=2 baryons, including the Λ Ã baryon, are calculated within the light cone QCD sum rules method. The contributions coming from the positive parity, spin-3=2 baryons, as well as from the positive and negative parity spin-1=2 baryons are eliminated by constructing combinations of various invariant amplitudes corresponding to the coefficients of the different Lorentz structures. We also present the results for the magnetic moments of the positive parity, spin-3=2 baryons.

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Section: Introductionmentioning

confidence: 99%

Magnetic moments ofJP=32−baryons in QCD

Aliev

Savcı

2014

Phys. Rev. D

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“…PEVA-based lattice QCD calculations of excited state magnetic moments (horizontal bands) are compared with quark-model expectations[9][10][11][12] and lattice QCD results obtained from a conventional correlation matrix analysis where finite-momentum opposite-parity contaminations are not removed. The finite-volume proton and neutron excitations associated with the N * (1535) resonance are denoted p * 1 and n * 1 , and excitations associated with the N * (1650) resonance are denoted p * 2 and n * 2 respectively.…”

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confidence: 99%

Structure of the Nucleon and its Excitations

et al. 2018

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The structure of the ground state nucleon and its finite-volume excitations are examined from three different perspectives. Using new techniques to extract the relativistic components of the nucleon wave function, the node structure of both the upper and lower components of the nucleon wave function are illustrated. A non-trivial role for gluonic components is manifest. In the second approach, the parity-expanded variational analysis (PEVA) technique is utilised to isolate states at finite momenta, enabling a novel examination of the electric and magnetic form factors of nucleon excitations. Here the magnetic form factors of low-lying odd-parity nucleons are particularly interesting. Finally, the structure of the nucleon spectrum is examined in a Hamiltonian effective field theory analysis incorporating recent lattice-QCD determinations of low-lying twoparticle scattering-state energies in the finite volume. The Roper resonance of Nature is observed to originate from multi-particle coupled-channel interactions while the first radial excitation of the nucleon sits much higher at approximately 1.9 GeV.

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“…To further determine the spin-parity quantum numbers and inner structure of Ωð2012Þ, besides its mass one should study its other properties, such as magnetic moments, radiative and strong decays properties, as well. In the early literature, limited discussions exist on the magnetic moments [22], radiative decays [23] of the Ω resonances. In present work we will attempt to understand the inner structure of this newly observed state Ωð2012Þ by analyzing the strong decay properties of its possible candidates within a chiral quark model, so that our theoretical widths can be compared with the measured width directly.…”

Section: Introductionmentioning

confidence: 99%

Possible interpretation of the newly observed Ω(2012) state

Xiao

Zhong

2018

Phys. Rev. D

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Inspired by the newly observed Ωð2012Þ state at Belle II, we investigate the two-body strong decays of Ω baryons up to N ¼ 2 shell within the chiral quark model. Our results indicate that (i) the newly observed Ωð2012Þ state could be assigned to the spin-parity J P ¼ 3=2 − state j70; 2 10; 1; 1; 3 2 − i and the experimental data can be reasonably described. However, the spin-parity J P ¼ 1=2 − state j70; 2 10; 1; 1; 1 2 − i and spin-parity J P ¼ 3=2 þ state j56; 4 10; 2; 0; 3 2 þ i cannot be completely excluded.(ii) The D-wave states in the N ¼ 2 shell are most likely to be narrow states with a width of dozens of MeV and have a good potential to be observed in the ΞK and/or Ξð1530ÞK channels in future experiments. The Ωð2250Þ resonance listed in PDG may be a good candidate for the J P ¼ 5=2 þ 1D wave state j56; 4 10; 2; 2; 5=2 þ i.

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Magnetic moments of negative parity baryons from the effective Hamiltonian approach to QCD

Cited by 10 publications

References 15 publications

Magnetic moments ofJP=32−baryons in QCD

Magnetic moments ofJP=32−baryons in QCD

Structure of the Nucleon and its Excitations

Possible interpretation of the newly observed Ω(2012) state

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