513 citations · 3k across the 139 of their papers we have counts for
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Ground states of all mesons and baryons in a quark model with Hidden Local Symmetry
Bing-Ran He, Masayasu Harada, Bing-Song Zou
We extend the chiral quark model for , , and quarks with vector mesons, which we proposed in the previous analysis, to a model with the quark. We include the none…
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…
Parity doublet model for baryon octets: diquark classifications and mass hierarchy based on the quark-line diagram
Takuya Minamikawa, Bikai Gao, Toru kojo +1
We construct invariant parity doublet models within the linear realization of the chiral symmetry. Describing baryons as the supe…
Quark model with Hidden Local Symmetry and its application to
Bing-Ran He, Masayasu Harada, Bing-Song Zou
We propose a chiral quark model including the and meson contributions in addition to the and meson contributions. We show that the masses of the ground state baryon…
Inverse mass ordering of light scalar mesons in the Nambu Jona-Lasinio model
Takahiro Saionji, Daisuke Jido, Masayasu Harada
The masses of the low-lying scalar mesons are investigated in the three-flavor Nambu Jona-Lasinio (NJL) model by treating the scalar mesons as composite objects of a quark and an a…
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…
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…
QCD vacuum and baryon masses
Youngman Kim, Igor A. Mazur, Masayasu Harada +1
To study a possible role of the quantum chromodynamics (QCD) vacuum in nuclear and hadron physics, we evaluate a physical quantity in a candidate of the QCD vacuum. In this study w…
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…
Inverse Mass Hierarchy of Light Scalar Mesons Driven by Anomaly-Induced Flavor Breaking
Yoshiki Kuroda, Masayasu Harada, Shinya Matsuzaki +1
We propose a novel mechanism to reproduce the observed mass hierarchy for the scalar mesons lighter than 1 GeV (called the inverse hierarchy) regarding them as mesons made of a qua…
Heavy quark spin multiplet structure of , , and
Yuki Shimizu, Yasuhiro Yamaguchi, Masayasu Harada
Very recently, the LHCb collaboration has reported the new result about the hidden-charm pentaquarks: near the threshold, and and n…
Single heavy baryons with chiral partner structure in a three-flavor chiral model
Yohei Kawakami, Masayasu Harada
We construct an effective hadronic model including single heavy baryons (SHBs) belonging to the representation under $\mbox{SU}(3)_L \times \mbox{SU}(3)_R…
Heavy quark spin multiplet structure of -like pentaquark as P-wave hadronic molecular state
Yuki Shimizu, Yasuhiro Yamaguchi, Masayasu Harada
We study the heavy quark spin (HQS) multiplet structure of P-wave -type pentaquarks treated as molecules of a heavy meson and a heavy baryon. We define the light-cloud…
Chiral partner structure of light nucleons in an extended parity doublet model
Takahiro Yamazaki, Masayasu Harada
We study chiral partner structure of four light nucleons, , , and using an effective chiral model based on the parity doublet structure. In our…
Dual chiral density waves in nuclear matter
Hiroaki Abuki, Yusuke Takeda, Masayasu Harada
We study inhomogeneous chiral phases in nuclear matter using a hadronic model with the parity doublet structure. With an extended ansatz for the dual chiral density wave off the ch…
Heavy quark spin multiplet structure of molecular states
Yuki Shimizu, Yasuhiro Yamaguchi, Masayasu Harada
We study the structure of heavy quark spin (HQS) multiplets for heavy meson-baryon molecular states in a coupled system of , with constructing the one-pio…
Analysis of , , , based on a chiral partner structure
Yohei Kawakami, Masayasu Harada
We construct an effective hadronic model including , , and regarding them as chiral partners to , , and $Σ…
A novel Dual Chiral Density Wave in nuclear matter based on a parity doublet structure
Yusuke Takeda, Hiroaki Abuki, Masayasu Harada
We study the Dual Chiral Density Wave (DCDW) in nuclear matter using a hadronic model with the parity doublet structure. We first extend the ordinary DCDW ansatz so as to incorpora…
Chiral partner structure of doubly heavy baryons with heavy quark spin-flavor symmetry
Yong-Liang Ma, Masayasu Harada
The spectrum of the doubly heavy baryons is estimated with respect to the new observation from the LHCb collaboration [Aaij:2017ueg] by using the chiral partner structure and heavy…
Hidden Charm Pentaquark and Doubly Charmed Baryon as Hadronic Molecule States
Yuki Shimizu, Masayasu Harada
We study hadronic molecular states in a coupled system of in channel, using the complex sca…
Relation between the mass modification of the heavy-light mesons and the chiral symmetry structure in dense matter
Masayasu Harada, Yong-Liang Ma, Daiki Suenaga +1
We point out that the study of the density dependences of the masses of heavy-light mesons give some clues to the chiral symmetry structure in nuclear matter. We include the omega…
Relations among pionic decays of spin-1 mesons from an SU(4)U(1) emergent symmetry in QCD
Hiroki Nishihara, Masayasu Harada
Motivated by recent results by lattice analysis, we assume that the spin-1 mesons of make a representation of of U(4)…
Lecture notes on the Skyrme model
Yong-Liang Ma, Masayasu Harada
This lecture provides a pedagogical instruction to the basic concepts of the Skyrme model and its some applications. As the preliminary for understanding the Skyrme model, we first…
Coupled channel analysis of molecule picture of
Yuki Shimizu, Daiki Suenaga, Masayasu Harada
We construct a potential obtained by one-pion exchange for the coupled channel -, and solve the coupled Schrödinger equations to determine the…