360 citations · 6.1k across the 180 of their papers we have counts for
95 papers · 1 filter
Axial anomaly effect on three-quark and five-quark singly heavy baryons
Hiroto Takada, Daiki Suenaga, Masayasu Harada +2
Effects of the axial anomaly on the mass spectrum of singly heavy baryons (SHBs) is studied in terms of the chiral effective theory based on the chiral linear representati…
Quark Confinement for Multi-Quark Systems -- Application to Fully-Charmed Tetraquarks
Guang-Juan Wang, Makoto Oka, Daisuke Jido
A new color basis system and confinement mechanism for multi-quark systems are proposed according to the string-type picture of QCD. The color string configurations in the strong c…
New insight into the exotic states strongly coupled with the from the
Guang-Juan Wang, Zhi Yang, Jia-Jun Wu +2
We have investigated the internal structure of the open- and hidden-charmed (/) molecules in the unified framework. We first fit the experimental lineshape of the…
Axial anomaly effect to the chiral-partner structure of diquarks at high temperature
Daiki Suenaga, Makoto Oka
Masses of positive-parity and negative-parity diquarks are investigated at finite temperature with a quark chemical potential. We employ the three-flavor Nambu-Jona-Lasinio model,…
Strong decays of singly heavy baryons from a chiral effective theory of diquarks
Yonghee Kim, Makoto Oka, Daiki Suenaga +1
A chiral effective theory of scalar and vector diquarks is formulated, which is based on chiral symmetry and includes interactions between scalar and vector…
-wave fully charmed tetraquark resonant states
Guang-Juan Wang, Qi Meng, Makoto Oka
We calculate the mass spectrum of the -wave fully-charmed tetraquark resonant states in the nonrelativistic quark model, which successfully describes the charm…
Doubly heavy tetraquarks in a chiral-diquark picture
Yonghee Kim, Makoto Oka, Kei Suzuki
Energy spectrum of doubly heavy tetraquarks, ( with and ), is studied in the potential chiral-diquark model. Using the chiral e…
Novel coupled channel framework connecting quark model and lattice QCD: an investigation on near-threshold states
Zhi Yang, Guang-Juan Wang, Jia-Jun Wu +2
A novel framework is proposed to extract near-threshold resonant states from finite-volume energy levels of lattice QCD and is applied to elucidate structures of the positive parit…
Doubly Heavy Tetraquark Resonant States
Qi Meng, Masayasu Harada, Emiko Hiyama +2
Spectrum of the doubly heavy tetraquarks, , is studied in a constituent quark model. Four-body problem is solved in a variational method where the real scaling tech…
Heavy baryon spectrum with chiral multiplets of scalar and vector diquarks
Yonghee Kim, Yan-Rui Liu, Makoto Oka +1
Chiral effective theory of scalar and vector diquarks is formulated according to the linear sigma model. The main application is to describe the ground and excited states of singly…
Higher fully-charmed tetraquarks: Radial excitations and P-wave states
Guang-Juan Wang, Lu Meng, Makoto Oka +1
We systematically calculate the mass spectrum of the higher excited fully-charmed tetraquark states including the S-wave radial excitations and the P-wave states w…
A review of quarkonia under strong magnetic fields
Sachio Iwasaki, Makoto Oka, Kei Suzuki
We review the properties of quarkonia under strong magnetic fields. The main phenomena are (i) mixing between different spin eigenstates, (ii) quark Landau levels and deformation o…
Survival probabilities of charmonia as a clue to measure transient magnetic fields
Sachio Iwasaki, Daisuke Jido, Makoto Oka +1
We investigate time evolution of -wave charmonium populations under a time-dependent homogeneous magnetic field and evaluate survival probabilities of the low-lying charmonia to…
Electromagnetic transitions of the singly charmed baryons with spin 3/2
June-Young Kim, Hyun-Chul Kim, Ghil-Seok Yang +1
We investigate the electromagnetic transitions of the singly charmed baryons with spin 3/2, based on a pion mean-field approach, also known as the chiral quark-soliton model, takin…
Suppression of decay widths in singly heavy baryons induced by the anomaly
Yohei Kawakami, Masayasu Harada, Makoto Oka +1
We study strong and radiative decays of excited singly heavy baryons (SHBs) using an effective chiral Lagrangian based on the diquark picture proposed in Ref. [1]. The effective La…
Mass spectrum and strong decays of tetraquark states
Guang-Juan Wang, Lu Meng, Li-Ye Xiao +2
We systematically study the mass spectrum and strong decays of the S-wave states in the compact tetraquark scenario with the quark model. The key ingredients of…
Hexaquark picture for
Hungchong Kim, K. S. Kim, Makoto Oka
Hexaquark wave function with the quantum numbers , which might be relevant for , is constructed under an assumption that this is composed only of qu…
Spectrum of singly heavy baryons from a chiral effective theory of diquarks
Yonghee Kim, Emiko Hiyama, Makoto Oka +1
The mass spectra of singly charmed and bottom baryons, and , are investigated using a nonrelativistic potential model with a heavy…
Chiral effective theory of diquarks and the U_A(1) anomaly
Masayasu Harada, Yan-Rui Liu, Makoto Oka +1
The diquark is a strongly correlated quark pair that plays an important role in hadrons and hadronic matter. In order to treat the diquak as a building block of hadrons, we formula…
Charmed dibaryon resonances in the potential quark model
Makoto Oka, Saori Maeda, Yan-Rui Liu
Charmed dibaryon states with the spin-parity , , and are predicted for the two-body (, , or ) systems. We employ the complex scaling met…
Nucleon and isobar in a strong magnetic field
Ulugbek Yakhshiev, Hyun-Chul Kim, Makoto Oka
We investigate the static properties of the nucleon in the presence of strong magnetic fields and discuss the consequent changes of the nucleon structure, based on the Skyrme model…
Further signatures to support the tetraquark mixing framework for the two light-meson nonets
Hungchong Kim, K. S. Kim, Myung-Ki Cheoun +2
In this work, we investigate additional signatures to support the tetraquark mixing framework that has been recently proposed as a possible structure for the two nonets, namely $a_…
Hadronic Paschen-Back effect
Sachio Iwasaki, Makoto Oka, Kei Suzuki +1
We find a novel phenomenon induced by the interplay between a strong magnetic field and finite orbital angular momenta in hadronic systems, which is analogous to the Paschen-Back e…
Tetraquark mixing framework for isoscalar resonances in light mesons
Hungchong Kim, K. S. Kim, Myung-Ki Cheoun +1
Recently, a tetraquark mixing framework has been proposed for light mesons and applied more or less successfully to the isovector resonances, , as well as to t…