22 citations · 36 across the 16 of their papers we have counts for
16 papers
A quark-diquark model for parity doublet structure of baryons
Bikai Gao, Masayasu Harada
The chiral invariant mass of baryons is a phenomenological input of parity doublet models, and its microscopic origin remains an open question. We propose that the chiral invariant…
Chiral symmetry restoration and hyperon suppression in neutron stars
Bikai Gao
The ``hyperon puzzle'' remains a fundamental challenge in nuclear astrophysics. We investigate hyperon emergence in neutron star matter using the parity doublet model with…
Linear realization of SU(3) parity doublet model for octet baryons with bad diquark
Bikai Gao, Atsushi Hosaka
We construct a linear parity doublet model for octet baryons. Our model employs the and chiral representations…
Origin of nucleon mass in the light of PSR J0614-3329 with quark-hadron crossover
Bikai Gao, Yuk-Kei Kong, Yong-Liang Ma
The recent NICER observation of PSR J0614-3329, revealing the smallest reliably measured neutron star radius of km at mass $M = 1.44^{+0.06}_{-0.07} M_\…
Implication of neutron star observations to the origin of nucleon mass
Bikai Gao, Xiang Liu, Masayasu Harada +1
We investigate the implications of neutron star observations for understanding the origin of nucleon mass using a framework that combines three complementary approaches: the equati…
Constraints on the strength of first-order phase transition and its relation to nucleon mass
Bikai Gao
We investigate the constraints on the strength of first-order phase transitions in neutron star matter and its relation to the origin of nucleon mass. By combining the parity doubl…
Chiral Invariant Mass Constraints from HESS J1731 347 in an Extended Parity Doublet Model with Isovector Scalar Meson
Yuk-Kei Kong, Bikai Gao, Masayasu Harada
The recent discovery of a central compact object (CCO) within the supernova remnant HESS J1731-347, with mass and radius km…
Hybrid stars with large quark cores within the parity doublet model and modified NJL model
Wen-Li Yuan, Bikai Gao, Yan Yan +1
Using the parity doublet model (PDM) for hadronic matter and a modified Nambu-Jona-Lasinio (NJL) model for quark matter, we investigate the potential existence of two- and three-fl…
Quarkyonic matter with chiral symmetry restoration
Bikai Gao, Masayasu Harada
We present a novel unified approach to describe the dense symmetric nuclear matter by combining the quarkyonic matter framework with the parity doublet model. This integration allo…
Constraining the competition between the deconfinement and chiral phase transitions in light of the multimessenger era
Wen-Li Yuan, Bikai Gao, Yan Yan +2
We extend the parity doublet model for hadronic matter and study the possible presence of quark matter inside the cores of neutron stars with the Nambu-Jona-Lasinio (NJL) model. Co…
Exploring the first-order phase transition in neutron stars using the parity doublet model and NJL-type quark model
Bikai Gao, Wen-Li Yuan, Masayasu Harada +1
We investigate the possibility and impacts of a first-order phase transition from hadronic matter to quark matter in neutron stars (NSs) using two specific models: the parity doubl…
Reconciling the HESS J1731-347 constraints with Parity doublet model
Bikai Gao, Yan Yan, Masayasu Harada
The recent discovery of a central compact object (CCO) within the supernova remnant HESS J1731-347, characterized by a mass of approximately and a…
Parity doublet model for baryon octets: ground states saturated by good diquarks and the role of bad diquarks for excited states
Bikai Gao, Toru Kojo, Masayasu Harada
Parity doublet model is an effective chiral model that includes the chiral variant and invariant masses of baryons. The chiral invariant mass has large impacts on the density depen…
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…
Chiral restoration of nucleons in neutron star matter: studies based on a parity doublet model
Takuya Minamikawa, Bikai Gao, Toru kojo +1
We review the chiral variant and invariant components of nucleon masses and its consequence on the chiral restoration in extreme conditions, neutron star matter in particular. We c…
Impacts of anomaly on nuclear and neutron star equation of state based on a parity doublet model
Bikai Gao, Takuya Minamikawa, Toru Kojo +1
We examine the role of the anomaly in a parity doublet model of nucleons which include the chiral variant and invariant masses. Our model expresses the anomaly by…