Conveners
Parallel: II
- Paulo Bedaque ()
Parallel: II
- Thomas Schaefer Schaefer ()
Parallel: IV
- Nils Andersson ()
Parallel: IV
- Mark Alford Alford ()
Parallel: VII
- Miguel Ángel Escobedo Espinosa ()
Parallel: VII
- Harvey Meyer ()
Parallel: IX
- Mariano Quiros ()
Mr
Sebastian Schmalzbauer
(Institut für theoretische Physik, Goethe-Universität Frankfurt)
25/06/2018, 15:00
The QCD phase diagram is studied in the presence of an isospin asymmetry with lattice QCD methods. In particular, we investigate the phase boundary between the normal and the pion condensation phases and the chiral/deconfinement transition. Our findings indicate that no pion condensation takes place above T≈160 MeV and also suggest that the deconfinement crossover continuously connects to the...
Dr
Massimo Mannarelli
(INFN)
25/06/2018, 15:30
Strange stars are exotic stellar objects, almost entirely consisting of deconfined quark matter. We analyze the possible emission of electromagnetic signals and of gravitational wave echoes from strange stars. In both cases we expect that the typical frequency of the emitted signals are on the order of tens of kHz.
Dr
Andreas Windisch
(Washington University in St Louis)
25/06/2018, 17:00
It is generally believed that systems with two fermion species that form
Cooper pairs form a neutral state, where the number densities of the two
fermion species are equal. This belief is based on mean field calculations
with a zero-range contact interaction. We investigate whether this claim still
holds if a Yukawa model is employed, where the interaction range is finite.
Our...
Prof.
Efrain Ferrer
(CUNY)
25/06/2018, 17:30
Axion electrodynamics of high-T QCD with topological charge changing transitions in the presence of a magnetic field is investigated. We find that this system exhibits two currents depending on the time derivative of the axion field θ, which have the same magnitude but opposite directions along the magnetic field. The anomalous current is produced by a time dependent medium polarization of...
Prof.
Vivian Incera
(CUNY)
25/06/2018, 18:00
We study the electromagnetic properties of dense QCD in the Magnetic Dual Chiral Density Wave phase and show that it exhibits anomalous Hall conductivity and magnetoelectricity. We investigate the stability of this inhomogeneous phase against low-energy fluctuations about the spatially modulated order parameter.
Dr
Simone Biondini
(Albert Einstein Center, Institute for Theoretical Physics)
26/06/2018, 15:00
Tight constraints from the LHC and from direct and indirect detection experiments have put many simple dark matter models under tension in
recent years. Besides putting forward new ideas in model building, it can be useful to develop more accurate computations on which a given dark matter
scenario is based. In particular, we focus on the calculation of the dark
matter relic density via...
Mr
Vincent Klaer
(TU-Darmstadt)
26/06/2018, 15:30
The QCD axion solves the QCD theta problem and is a possible dark matter candidate. Axion production in the early Universe is complicated because the axion field develops cosmic strings. The string dynamics is sensitive to the tension, which cannot be reproduced correctly in conventional classical-field simulations. We introduce a new approach to solve this problem without an exponentially...
Patrick Kneschke
(University of Stavanger)
26/06/2018, 16:00
The quark-meson model is often used as an effective low-energy model for QCD to study the chiral
transition at finite temperature T, baryon chemical potential \mu and isospin chemical potential \mu_I.
We determine the model parameters to one-loop order and express them in terms of the physical meson and quark masses, as well as the pion decay constant using on-shell renormalization. We study...
Mr
Stephan Stetina
(TU Vienna)
26/06/2018, 17:00
Multi-messenger observations of neutron stars are likely to usher in a golden age of nuclear astrophysics and promote neutron stars to one of the most interesting “laboratories” in the universe. Transport in the outer core of neutron stars determines a number of observable phenomena, including the damping of hydrodynamic modes, r-modes and the spin evolution of neutron stars. In the core of a...
Andreas Schmitt
(University of Southampton)
26/06/2018, 17:30
In color-superconducting quark matter gluons and photons mix, and thus an external ordinary magnetic field may induce color-magnetic flux tubes. I will discuss the structure of these flux tubes, in particular pointing out a novel flux tube configuration in color-flavor locked quark matter that has a 2SC core, rather than a completely unpaired one. This configuration is energetically preferred...
Prof.
Felipe J. Llanes-Estrada
(Universidad Complutense de Madrid)
26/06/2018, 18:00
I discuss the EoS of neutron stars in the context of modified theories of gravity
so that astrophysical constraints cannot be taken for granted (e.g. a two-solar mass
neutron star might be achieved because of weaker gravity instead of a stiffer EoS).
Prof.
Javier L Albacete
(Universidad de Granada)
28/06/2018, 15:30
I shall present an analytical calculation of the two-point correlator of the energy-momentum tensor associated to the early stages of the matter produced in heavy ion collisions, $\langle T^{\mu \nu}(x)T^{\mu \nu}(y)\rangle$. Our calculation is performed under the classical approximation of the Color Glass Condensate and provides additional dynamical information on the early times...
Anna Radovskaya
(Lebedev Physics Institute of RAS)
28/06/2018, 16:00
Quantum corrections to the Classical Statistical Approximation (CSA) are calculated within the Keldysh-Schwinger technique for the longitudinally expanding homogeneous scalar field. Influence of these corrections to the evolution of the trace of the energy-momentum tensor is considered in details. It is shown that quantum corrections modify the equation of state in the intermediate...
Kirill Boguslavski
(University of Jyväskylä, Finland)
28/06/2018, 17:00
We study the spectral properties of a highly occupied non-Abelian system, which is expected to be created in the weak-coupling picture during the initial stages after a heavy-ion collision. The spectral function of this far-from-equilibrium plasma is measured by employing linear response theory in classical-statistical lattice simulations. We establish the existence of transversely and...
Jarkko Peuron
(University of Jyväskylä)
28/06/2018, 17:30
The initial stage of a relativistic heavy ion collision is dominated by an overoccupied, strong gluon field, which can be understood in a classical approximation. The physics of equilibration and isotropization of this field is dominated by the plasmon mass scale, which is poorly understood in this very nonequilibrium system. We address this by measuring the plasmon mass scale in two and three...
Prof.
Gert Aarts
(Swansea University)
28/06/2018, 18:00
The behaviour of strange baryons in the hadronic gas and the quark-gluon plasma gives essential insight into chiral symmetry restoration and parity doubling, and has direct consequences for phenomenology, e.g. via the hadron resonance gas. We present results obtained using nonperturbative lattice simulations, employing the FASTSUM anisotropic Nf=2+1 ensembles.
Dr
Zong-Gang Mou
(University of Stavanger)
29/06/2018, 14:30
We perform numerical simulations of Cold Electroweak Baryogenesis, including for the first time in the Bosonic sector the full electroweak gauge group SU(2)$\times$U(1) and CP-violation.
We investigate the dependence of the asymmetry on the speed at which electroweak symmetry breaking takes place.
Curiously, we find that the overall sign of the asymmetry depends on the quench time and the...
Ms
Jorinde van de Vis
(Nikhef)
29/06/2018, 15:00
Effective field theory is an attractive framework to study Electroweak Baryogenesis in a model-independent way. We add a dimension-six operator to the Higgs potential in order to have a strongly first order phase transition, which is necessary for successful baryogenesis. Another necessary ingredient is CP-violation, which can be provided by dimension-six interactions between the Higgs and,...
Dr
Julien Serreau
(Université Paris Diderot)
29/06/2018, 15:30
Lattice simulations of Yang-Mills theories and QCD in the Landau gauge demonstrate
that the gluon propagator saturates at vanishing momentum. This can
be modelled by a massive deformation of the corresponding Faddeev-Popov
Lagrangian known as the Curci-Ferrari model. The latter does not modify the known
ultraviolet regime of the theory and provides a successful perturbative...
Mr
Jan Maelger
(Ecole Polytechnique/Université Paris 7 Diderot)
29/06/2018, 16:00
The QCD phase diagram with heavy quarks exhibits ubiquitous features among all confining one-loop models, e.g. its Nf-dependence. These will be illustrated invoking various approaches and its predictions tested against a particular extension to two-loop order within the Curci-Ferrari model.
