Hyun-Chul Kim

The electric dipole moment of the nucleons in holographic QCD

We introduce the strong CP-violation in the framework of AdS/QCD model and calculate the electric dipole moments of nucleons as well as the CP-violating pion-nucleon coupling. Our holographic estimate of the electric dipole moments gives for the neutron dn = 1.08 × 10−16 e⋅cm , which is comparable with previous estimates. We also predict that the electric dipole moment of the proton should be precisely the minus of the neutron electric dipole moment, thus leading to a new sum rule on the electric dipole moments of baryons.

Magnetic susceptibility of the QCD vacuum

Abstract We investigate the magnetic susceptibility of the QCD vacuum, based on the instanton vacuum. Starting from the instanton liquid model for the instanton vacuum, we derive the light-quark partition function Z [ V , T , m ˆ ] in the presence of the current quark mass m ˆ as well as the external Abelian vector and tensor fields. We calculate a two-point correlation function relevant for the magnetic susceptibility and derive it beyond the chiral limit. We obtain for the different flavors the following magnetic susceptibility: χ u , d 〈 i ψ u , d † ψ u , d 〉 0 ∼ 40 – 45 MeV , while χ s 〈 i ψ s † ψ s 〉 0 ≃ 6 – 10 MeV with the quark condensate 〈 i ψ † ψ 〉 0 .

A new N∗(1675) resonance in the γN→ηN reaction

We study the

Magnetic moments of exotic pentaquarks in the chiral quark-soliton model

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Octet, decuplet, and antidecuplet magnetic moments in the chiral quark soliton model reexamined

-photoproduction focusing on the new nucleon resonance which was observed at

Axial-vector form factors of the nucleon within the chiral quark-soliton model and their strange components

sqrt{s}=1675

Tensor susceptibilities of the vacuum from constituent quarks

MeV with a narrow decay width (

Leading-twist pion and kaon distribution amplitudes from the QCD instanton vacuum

sim 10

Leading-twist pion and kaon distribution amplitudes in the gauge-invariant nonlocal chiral quark model from the instanton vacuum

MeV) in the recent GRAAL experiment. Using an effective Lagrangian approach, we compute differential cross sections for the

Hyperon semileptonic decays and quark spin content of the proton

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