Conveners
Section F
- Thomas Cohen (University of Maryland)
Section F
- Laura Fabbietti (Technische Universitaet Muenchen (DE))
Section F
- Laura Fabbietti (Technische Universität München)
Section F
- Andreas Schmitt (University of Southampton)
Description
Section F: Nuclear and Astroparticle Physics
Nuclear matter; nuclear forces; quark matter; neutron and compact stars.
Conveners: M. Alford (Washington U. in St.Louis), D. Blaschke (U. Wroclaw), T. Cohen (U. Maryland), L. Fabbietti (TU Munich), A. Schmitt (U Southampton)
Chirality of neutrinos modifies the conventional hydrodynamic behavior at the macroscopic scale and leads to anomalous transport phenomena in neutrino matter. We argue that such chiral transport of neutrinos should play important roles in the evolution of core-collapse supernovae, and, in particular, leads to the possible inverse energy cascade from small to large scales, which may be relevant...
Dense matter in the core of neutron stars is strongly coupled and presents an enormous theoretical challenge. First-principle methods from QCD are currently known only for vanishing or asymptotically large densities, while phenomenological models are usually restricted to either nuclear or quark matter and/or contain many unknown parameters. I will discuss whether and how holographic methods...
I will discuss recent advances in the perturbative description of the thermodynamic properties of cold unpaired quark matter. After presenting new results for the temperature dependence of the Equation of State (EoS), I will describe recent advances in determining the next four-loop term in the weak coupling expansion of the zero-temperature EoS. The potential implications of these results to...
We propose an astrophysical scenario in which hadronic stars and quark stars coexist. While hadronic stars would populate a branch of very compact objects (radii measurements indicate the existence of such configurations in some cases), quark stars would instead populate a branch of very massive stars (e.g. the two solar mass star PSR J1614-2230). The conversion process between a hadronic star...
The Symmetry Energy is a fundamental ingredient of the nuclear matter Equation Of State.
The elliptic-flow ratio of neutrons with respect to protons or light complex particles in
reactions of heavy-ions at pre-relativistic energies has been proposed as an observable sensitive to the strength of the Symmetry Energy at supra-saturation densities.
The results obtained from the existing...
HADES at SIS18 is currently the only experiment studying properties of strongly interacting matter by means of rare and penetrating probes using proton and heavy ion beams in a few AGeV energy range. The study of system size dependence has been recently completed with Au+Au collisions at 1.23 AGeV. The measurements provide a results on kaons, strange resonances, including the first at such...
The AMADEUS experiment deals with the investigation of the low-energy kaon-nuclei hadronic interaction at the DAΦNE collider at LNF-INFN, which is fundamental to solve longstanding questions in the non-perturbative strangeness QCD sector. AMADEUS step 0 consisted in the reanalysis of 2004/2005 KLOE data, exploiting $K^−$ absorptions in H, ${}^4$He, ${}^9$Be and ${}^{12}$C, leading to the first...
The in-medium modification of hadron properties is the main field of study for the strangeness sector in the non-perturbative low-energy region of QCD.
The behaviour of strange hadrons at extreme densities are of capital importance for the description of the nuclear equation of state and the evaluation of the strangeness component in the core of the neutron stars.
The study of...
Recent advances in experiments of the symmetry energy of nuclear matter and in neutron star observations yield important new insights on the equation of state of neutron matter at nuclear densities. In this regime the equation of state of neutron matter plays a critical role in determining the mass-radius relationship for neutron stars. We show how microscopic calculations of neutron matter,...
The crust of a neutron star has a profound influence on various observed astrophysical phenomena such as pulsar sudden spin-ups, quasi-periodic oscillations in the giant flares from soft gamma-ray repeaters, X-ray bursts and superbursts, or the cooling of transiently accreting neutron stars. We have determined the internal constitution and the equation of state of neutron-star crusts in the...
This work is based on
1) Low energy chiral two pion exchange potential with statistical uncertainties
By R. Navarro Pérez, J.E. Amaro, E. Ruiz Arriola.
arXiv:1411.1212 [nucl-th].
10.1103/PhysRevC.91.054002.
Phys.Rev. C91 (2015) no.5, 054002.
2) Partial Wave Analysis of Chiral NN Interactions
By R. Navarro Perez, J.E. Amaro, E. Ruiz Arriola.
arXiv:1310.8167...
I advocate a proposal that two of the largest open questions in cosmology, the origin of the matter/antimatter asymmetry and the nature of the dark matter (DM), may have their origin within a single theoretical framework. Furthermore, both effects may originate at the same cosmological epoch from one and the same QCD physics when the $\theta$ parameter was not zero. This source of the strong...
The recent observation by the LIGO collaboration of black hole merges using gravitation waves opens a new portal to study our universe. The sensitivity of gravitation waves measurements is likely to be extended in the coming future to allow the detection and study of neutron stars merges. Such merges are thought to be the main source for r-process nuclear synthesis and can potentially act as a...
In compact stars, nucleons form an interacting multi-fluid system of a neutron superfluid and a proton superconductor. The rotation of the star and the strong background magnetic fields generate superfluid vortices and superconducting flux tubes in the core. Using a field-theoretical model of two coupled bosonic fields with entrainment and density coupling, the phase structure of the system...
None
Short range particle repulsion is rather important property of the hadronic and nuclear matter equations of state. I present a novel equation of state which is based on the virial expansion for the multicomponent mixtures with hard core repulsion.
The suggested equation of state explicitly contains the surface tension which is induced by particle interaction. At high densities such a surface...
