Zobrazeno 1 - 10
of 364
pro vyhledávání: '"Harada, Masayasu"'
In this review, we summarize recent studies on nuclear matter and finite nuclei based on parity doublet models. We first construct a parity doublet model (PDM), which includes the chiral invariant mass $m_0$ of nucleons together with the mass generat
Externí odkaz:
http://arxiv.org/abs/2405.06956
The recent discovery of a central compact object (CCO) within the supernova remnant HESS J1731-347, characterized by a mass of approximately $0.77^{+0.20}_{-0.17} M_{\odot}$ and a radius of about $10.4^{+0.86}_{-0.78}$ km, has opened up a new window
Externí odkaz:
http://arxiv.org/abs/2404.04786
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 dependence of models which can be constrained by neutron star observations.
Externí odkaz:
http://arxiv.org/abs/2403.18214
We analyze the mass and width of the doubly heavy tetraquark $T_{ccs}$ composed of a heavy diquark and a light quark cloud with strangeness with assuming that a color anti-triplet heavy diquark is a dominant component of the doubly charmed tetraquark
Externí odkaz:
http://arxiv.org/abs/2403.03548
Autor:
Sakai, Azumi, Harada, Masayasu, Nonaka, Chiho, Sasaki, Chihiro, Shigaki, Kenta, Yano, Satoshi
We investigate the effect of chiral mixing on dilepton production by combining the in-medium spectral function in the chiral effective field theory with the state-of-the-art fluid dynamical simulations. We compare the spectral functions with differen
Externí odkaz:
http://arxiv.org/abs/2312.08770
Numerous exotic hadrons with heavy quarks have been reported in the experiments. In such states, symmetries of heavy quarks are considered to play a significant role. In particular, the superflavor symmetry, or also called the heavy quark anti-diquar
Externí odkaz:
http://arxiv.org/abs/2311.04695
Autor:
Sakai, Azumi, Harada, Masayasu, Nonaka, Chiho, Sasaki, Chihiro, Shigaki, Kenta, Yano, Satoshi
We perform a systematic study of dilepton emission in a hot QCD medium based on three different scenarios of chiral mixing, each of which yields a characteristic structure in the vector spectral function. The in-medium spectral functions are accommod
Externí odkaz:
http://arxiv.org/abs/2308.03305
We extend the chiral quark model for $u$, $d$, $c$ and $b$ quarks with vector mesons, which we proposed in the previous analysis, to a model with the $s$ quark. We include the nonet pseudo-scalar and vector mesons together with the singlet scalar mes
Externí odkaz:
http://arxiv.org/abs/2307.16280
Publikováno v:
Phys. Rev. D108, 054033 (2023)
Effects of the $U(1)_A$ 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 representation for light flavors. We consider SHBs made of both three quarks ($Qqq
Externí odkaz:
http://arxiv.org/abs/2307.15304
We construct $ {\rm SU(3)}_{\rm L} \otimes {\rm SU(3)}_{\rm R}$ invariant parity doublet models within the linear realization of the chiral symmetry. Describing baryons as the superposition of linear representations should be useful description for t
Externí odkaz:
http://arxiv.org/abs/2306.15564