192 citations · 1.9k across the 43 of their papers we have counts for
27 papers · 1 filter
Strong-Field Physics in QED and QCD: From Fundamentals to Applications
Koichi Hattori, Kazunori Itakura, Sho Ozaki
We provide a pedagogical review article on fundamentals and applications of the quantum dynamics in strong electromagnetic fields in QED and QCD. The fundamentals include the basic…
Dirac Kondo effect under magnetic catalysis
Koichi Hattori, Daiki Suenaga, Kei Suzuki +1
We develop a mean-field theory of a novel Kondo effect emerging in systems without a Fermi surface, which instead emerges under strong magnetic fields. We determine the magnitude o…
In-medium polarization tensor in strong magnetic fields (II): Axial Ward identity at finite temperature and density
Koichi Hattori, Kazunori Itakura
We investigate the axial Ward identity (AWI) for massive fermions in strong magnetic fields. The divergence of the axial-vector current is computed at finite temperature and/or den…
In-medium polarization tensor in strong magnetic fields (I): Magneto-birefringence at finite temperature and density
Koichi Hattori, Kazunori Itakura
We investigate in-medium polarization effects of the fermion and antifermion pairs at finite temperature and density in strong magnetic fields within the lowest Landau level approx…
Di-lepton production from a single photon in strong magnetic fields: Vacuum dichroism
Koichi Hattori, Hidetoshi Taya, Shinsuke Yoshida
We study di-lepton production from a single photon in the presence of a strong constant magnetic field. By the use of the Ritus-basis formalism, we analytically evaluate the photon…
Wigner functions and quantum kinetic theory of polarized photons
Koichi Hattori, Yoshimasa Hidaka, Naoki Yamamoto +1
We derive the Wigner functions of polarized photons in the Coulomb gauge with the expansion applied to quantum field theory, and identify side-jump effects for massless pho…
Effective quantum kinetic theory for spin transport of fermions with collsional effects
Di-Lun Yang, Koichi Hattori, Yoshimasa Hidaka
We systematically derive the collision term for the axial kinetic theory, a quantum kinetic theory delineating the coupled dynamics of the vector/axial charges and spin transport c…
Note on all-order Landau-level structures of the Heisenberg-Euler effective actions for QED and QCD
Koichi Hattori, Kazunori Itakura, Sho Ozaki
We investigate the Landau-level structures encoded in the famous Heisenberg-Euler (HE) effective action in constant electromagnetic fields. We first discuss the HE effective action…
Emergent QCD Kondo effect in two-flavor color superconducting phase
Koichi Hattori, Xu-Guang Huang, Robert D. Pisarski
We show that effective coupling strengths between ungapped and gapped quarks in the two-flavor color superconducting (2SC) phase are renormalized by logarithmic quantum corrections…
Axial Kinetic Theory and Spin Transport for Fermions with Arbitrary Mass
Koichi Hattori, Yoshimasa Hidaka, Di-Lun Yang
We derive the quantum kinetic theory for fermions with arbitrary mass in a background electromagnetic field from the Wigner-function approach. Since spin of massive fermions is a d…
Bulk Viscosity of Quark-Gluon Plasma in Strong Magnetic Fields
Koichi Hattori, Xu-Guang Huang, Dirk H. Rischke +1
We investigate the viscosities of the quark-gluon plasma in strong magnetic fields within the leading-log and lowest Landau level (LLL) approximations. We first show that the bulk…
Anatomy of the magnetic catalysis by renormalization-group method
Koichi Hattori, Kazunori Itakura, Sho Ozaki
We first examine the scaling argument for a renormalization-group (RG) analysis applied to a system subject to the dimensional reduction in strong magnetic fields, and discuss the…
Gluon Spectrum in Quark-Gluon Plasma under Strong Magnetic Fields
Koichi Hattori, Daisuke Satow
We obtain the general expression of the gluon propagator at finite temperature () and in a magnetic field (), for the case that the four transverse tensor structures appear i…
Heavy-Quark Diffusion Dynamics in Quark-Gluon Plasma under Strong Magnetic Fields
Koichi Hattori, Kenji Fukushima, Ho-Ung Yee +1
We discuss heavy-quark dynamics in the quark-gluon plasma under a strong magnetic field induced by colliding nuclei. By the use of the diagrammatic resummation techniques for Hard…
Longitudinal Conductivity in Strong Magnetic Field in Perturbative QCD: Complete Leading Order
Koichi Hattori, Shiyong Li, Daisuke Satow +1
We compute the longitudinal electrical conductivity in the presence of strong background magnetic field in complete leading order of perturbative QCD, based on the assumed hierarch…
Electrical Conductivity of Quark-Gluon Plasma in Strong Magnetic Fields
Koichi Hattori, Daisuke Satow
We compute the electrical conductivity of quark-gluon plasma in a strong magnetic field with quantum field theory at finite temperature using the lowest Landau level approximat…
D mesons in a magnetic field
Philipp Gubler, Koichi Hattori, Su Houng Lee +3
We investigate the mass spectra of open heavy flavor mesons in an external constant magnetic field within QCD sum rules. Spectral ansätze on the phenomenological side are proposed…
Mesons in strong magnetic fields: (I) General analyses
Koichi Hattori, Toru Kojo, Nan Su
We study properties of neutral and charged mesons in strong magnetic fields |eB|>> Lambda_QCD^2 with Lambda_QCD being the QCD renormalization scale. Assuming long-range interaction…
Heavy Quark Diffusion in Strong Magnetic Fields at Weak Coupling and Implications for Elliptic Flow
Kenji Fukushima, Koichi Hattori, Ho-Ung Yee +1
We compute the momentum diffusion coefficients of heavy quarks, and , in a strong magnetic field along the directions parallel and perpendicular to ,…
Photon and dilepton spectra from nonlinear QED effects in supercritical magnetic fields induced by heavy-ion collisions
Koichi Hattori, Kazunori Itakura
We discuss properties of photons in extremely strong magnetic fields induced by the relativistic heavy-ion collisions. We investigate the vacuum birefringence, the real-photon deca…
QCD Kondo effect: quark matter with heavy-flavor impurities
Koichi Hattori, Kazunori Itakura, Sho Ozaki +1
We show that the Kondo effect occurs in light quark matter which contains heavy quarks as impurities. We consider a scattering between a heavy-flavor impurity and a light quark nea…
Euler-Heisenberg-Weiss action for QCD+QED
Sho Ozaki, Takashi Arai, Koichi Hattori +1
We derive an analytic expression for one-loop effective action of QCD+QED at zero and finite temperatures by using the Schwinger's proper time method. The result is a nonlinear eff…
Charmonium Spectroscopy in Strong Magnetic Fields by QCD Sum Rules: S-Wave Ground States
Sungtae Cho, Koichi Hattori, Su Houng Lee +2
We investigate quarkonium mass spectra in external constant magnetic fields by using QCD sum rules. We first discuss a general framework of QCD sum rules necessary for properly ext…
QCD sum rules for magnetically induced mixing between and
Sungtae Cho, Koichi Hattori, Su Houng Lee +2
We investigate the properties of charmonia in strong magnetic fields by using QCD sum rules. We show how to implement the mixing effects between and on the basis of fie…