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Neutron-star cores contain matter at the highest densities in our Universe. This highly compressed matter may undergo a phase transition where nuclear matter melts into deconfined quark matter, liberating its constituent quarks and gluons.…

高能天体物理现象 · 物理学 2024-01-15 Eemeli Annala , Tyler Gorda , Joonas Hirvonen , Oleg Komoltsev , Aleksi Kurkela , Joonas Nättilä , Aleksi Vuorinen

Neutral-current neutrino scattering from the deuteron leading to proton-neutron final states is considered using an approach that incorporates relativistic dynamics and consequently provides robust modeling at relatively high energies and…

核理论 · 物理学 2020-07-01 Sabine Jeschonnek , J. W. Van Orden , T. W. Donnelly

Spin polarized states in dense neutron matter with recently developed Skyrme effective interaction (BSk20 parametrization) are considered in the magnetic fields $H$ up to $10^{20}$ G at finite temperature. In a strong magnetic field, the…

核理论 · 物理学 2015-02-02 A. A. Isayev , J. Yang

The properties of dense QCD matter are delineated through the construction of equations of state which should be consistent with QCD calculations in the low and high density limits, nuclear laboratory experiments, and the neutron star…

高能天体物理现象 · 物理学 2019-09-04 Toru Kojo

The first results of a new three-dimensional, finite temperature Skyrme-Hartree-Fock+BCS study of the properties of inhomogeneous nuclear matter at densities and temperatures leading to the transition to uniform nuclear matter are…

太阳与恒星天体物理 · 物理学 2009-05-05 W. G. Newton J. R. Stone

As the interior density of a neutron star can become very high, it has been expected and discussed that quark matter may exist inside it. To describe the transition from hadron to quark phases (and vice versa), there are mainly two methods;…

高能天体物理现象 · 物理学 2017-03-29 Takahide Kambe , Tetsuya Katayama , Koichi Saito

We investigate a class of universes in which the weak interaction is not in operation. We consider how astrophysical processes are altered in the absence of weak forces, including Big Bang Nucleosynthesis (BBN), galaxy formation, molecular…

星系天体物理 · 物理学 2018-03-14 E. Grohs , Alex R. Howe , Fred C. Adams

We consider symmetron model in a generalized background with a hope to make it compatible with dark energy. We observe a "no go" theorem at least in case of a conformal coupling. Being convinced of symmetron incapability to be dark energy,…

高能物理 - 理论 · 物理学 2015-06-12 K. Bamba , R. Gannouji , M. Kamijo , S. Nojiri , M. Sami

We investigate the phase transition in cold and dense quark matter in an intuitive way that shares common features of the effective model approaches. We first express the quasi-particle contribution to the thermodynamic potential with the…

高能物理 - 唯象学 · 物理学 2015-06-04 Kenji Fukushima

We study the hadron-quark phase transition in the interior of neutron stars (NS's). We calculate the equation of state (EOS) of hadronic matter using the Brueckner-Bethe-Goldstone formalism with realistic two-body and three-body forces, as…

核理论 · 物理学 2009-11-07 G. F. Burgio , M. Baldo , H. -J. Schulze , P. K. Sahu

Neutron stars explore matter at the highest densities in the universe such that their inner cores might undergo a phase transition from hadronic to exotic phases, e.g., quark matter. Such a transition could be associated with non-trivial…

核理论 · 物理学 2023-03-22 Rahul Somasundaram , Ingo Tews , Jérôme Margueron

Elementary particles such as quarks and gluons are expected to be fundamental degrees of freedom at ultra high temperatures or densities, while natural phenomena in our daily lives are described in terms of hadronic degrees of freedom.…

高能天体物理现象 · 物理学 2024-12-05 Reiko Harada , Kipp Cannon , Kenta Hotokezaka , Koutarou Kyutoku

We study the finite temperature Hartree-Fock-BCS approximation for selected stable Sn nuclei with zero-range Skyrme forces. Hartree Fock BCS approximation allows for a straightforward interpretation of the results since it involves u and…

核理论 · 物理学 2014-11-03 E. Yüksel , E. Khan , K. Bozkurt , G. Colò

From empirically determined values of some of the characteristic constants associated with homogeneous nuclear matter at saturation and sub-saturation densities, within the framework of a Skyrme-inspired energy density functional, we…

核理论 · 物理学 2015-06-23 N. Alam , B. K. Agrawal , J. N. De , S. K. Samaddar , G. Colò

Non-congruence appears to be the most general form of phase transition in cosmic matter and in the laboratory. In terrestrial applications noncongruencemeans coexistence of phases with different chemical composition in systems consisting of…

宇宙学与河外天体物理 · 物理学 2014-04-07 Igor Iosilevskiy

The equation of State for dense matter is studied with color molecular dynamics, in which hadron matter and quark matter are automatically distinguished only from quark color state. The quark-quark interactions are optimized to be…

核理论 · 物理学 2024-02-20 Nobutoshi Yasutake , Toshiki Maruyama

We study the correlation between the thickness of the neutron skin in finite nuclei and the nuclear symmetry energy for isotopic chains of even-even Ni, Sn, and Pb nuclei in the framework of the deformed self-consistent mean-field Skyrme…

核理论 · 物理学 2015-05-30 M. K. Gaidarov , A. N. Antonov , P. Sarriguren , E. Moya de Guerra

We investigate phase transitions for the Walecka model at very high temperatures. As is well known, depending on the parametrization of this model and for the particular case of a zero chemical potential ($ \mu $), a first order phase…

核理论 · 物理学 2008-11-26 A. Delfino , M. Jansen , V. S. Timóteo

The nature of the melting transition in two-dimensional systems of particles has attracted considerable research attention since the development of Kosterlitz-Thouless-Halperin-Nelson-Young (KTHNY) theory. The hexatic phase proposed by this…

其他凝聚态物理 · 物理学 2026-05-13 Daniel Schick , Tim Matthies , Thomas Mutschler , Levente Rózsa , Ulrich Nowak

The transition magnetic moment of a sterile-to-active neutrino conversion gives rise to not only radiative decay of a sterile neutrino, but also its non-standard interaction (NSI) with matter. For sterile neutrinos of keV-mass as dark…

高能物理 - 唯象学 · 物理学 2016-05-25 Jiunn-Wei Chen , Hsin-Chang Chi , Shin-Ted Lin , C. -P. Liu , Lakhwinder Singh , Henry T. Wong , Chih-Liang Wu , Chih-Pan Wu