Conveners
Parallel: I
- Konrad Tywoniuk ()
Parallel: I
- Jacopo Ghiglieri ()
Parallel: III
- Stephan Huber ()
Parallel: III
- Alfredo Urbano ()
Parallel: VI
- Szabolcs Borsanyi ()
Parallel: VI
- Stanislaw Mrowczynski ()
Parallel: VIII
- Javier Albacete ()
Dr
Edmond Iancu
(Institut de Physique Théorique, Saclay)
25/06/2018, 15:00
It is well known that the multiple interactions of a hard probe with
the dense quark-gluon plasma results in the "medium-induced" radiation
of soft gluon, responsible e.g. for jet energy loss. Such an emission
is computed using the BDMPS-Z formalism which has since been
generalised to include multiple medium-induced emissions. To get a
complete picture of the evolution of a jet in a dense...
Dr
Wilke van der Schee
(Utrecht University/MIT)
25/06/2018, 16:00
We present new results on the energy loss of light partons traversing a highly dynamical strongly coupled quark-gluon plasma. As QGP has large gradients in both temperature and the fluid velocity, it is crucial to study energy loss without assuming a homogeneous plasma, especially as it is known that energy loss depends on the plasma evolution in a non-local way. In a holographic description,...
Stanislaw Mrowczynski
(National Centre for Nuclear Research)
25/06/2018, 17:00
The quark-gluon plasma, which is produced at an early stage of ultrarelativistic heavy-ion collisions, is expected to be initially strongly populated with chromodynamic fields. We address the question how heavy quarks interact with such a turbulent plasma in comparison with an equilibrated one of the same energy density. For this purpose we derive a Fokker-Planck transport equation of heavy...
Dr
Stefan Floerchinger
(Heidelberg U.)
25/06/2018, 17:30
The entanglement entropy associated to finite spatial regions for Gaussian states in quantum field theory is characterized in terms of local correlation functions on space-like Cauchy hypersurfaces. The framework is applied to explore an expanding light cone geometry in the particular case of the Schwinger model for quantum electrodynamics in 1+1 space-time dimensions. We observe that the...
Dr
György Wolf
(MTA Wigner RCP)
25/06/2018, 18:00
The masses of the low lying charmonium states, namely, the $J/\Psi$, $\Psi(3686)$, and $\Psi(3770)$ are shifted downwards due to the second order Stark effect. In $\bar p + \rm{Au}$ collisions at $6-10$~GeV we study their in-medium propagation. The time evolution of the spectral functions of these charmonium states is studied with a Boltzmann-Uehling-Uhlenbeck (BUU) type transport model. We...
Mr
Yidian Chen
(Institute of High Energy Physics, CAS)
26/06/2018, 15:00
We investigate the gravitation waves produced from QCD and electroweak phase transitions in the early universe by using a 5-dimension holographic QCD model and a holographic technicolor model. The dynamical holographic QCD model is to describe the pure gluon system, where a first order confinement-deconfinement phase transition can happen at the critical temperature around 250 ${\rm MeV}$. The...
Mr
Thomas Garratt
(University of Wuerzburg)
26/06/2018, 15:30
The dynamics of inhomogeneous quantum fields out of equilibrium are especially relevant for the study of first-order phase transitions. It is our aim to calculate how bubble configurations of the new phase, that form in such a process, propagate and locally approach thermal equilibrium. The Electroweak phase transition in the early universe is of particular interest, since Baryogenesis can...
Prof.
Sergey Odintsov
(ICREA and ICE)
26/06/2018, 17:00
In this talk we overview the inflation in higher-derivative quantum gravity which is shown to be consistent with Planck observational data. The account of one-loop quantum gravity corrections is done. It is demonstrated that quantized R^2 gravity with scalar electrodynamics also gives the consistent inflation.
Francisco Torrenti
(Instituto de Fisica Teorica UAM-CSIC)
26/06/2018, 17:30
I will discuss the out-of-equilibrium dynamics of the Standard Model after inflation, when the Higgs is weakly coupled to the inflationary sector. During inflation the Higgs forms a condensate, which oscillates short after inflation ends, transferring most of its energy to the SU(2)xU(1) gauge fields via parametric resonance. I have studied this process with classical lattice simulations,...
Mr
Gabriel Moreau
(Université Paris Diderot)
26/06/2018, 18:00
We study the back-reaction of the infrared modes of an O(N) theory in a classical de Sitter background. We use the nonperturbative renormalization group methods to extract the flow of the Hubble constant as we integrate the gravitationally enhanced long wavelength modes. The scalar theory flows towards an effective zero dimensional theory for the super-horizon modes, which allows to perform...
Prof.
Laurence Yaffe
(University of Washington)
28/06/2018, 15:00
The QCD pressure anisotropy in a uniform background magnetic field has been computed for a wide range of temperature and magnetic field. Surprisingly, it has been found to exhibit near universal behavior, depending predominately on a single dimensionless ratio, $B/T^2$. When appropriately compared with the corresponding quantity in maximally supersymmetric Yang-Mills (SYM) theory, remarkably...
Mr
Peter Thomas Jahn
(TU Darmstadt)
28/06/2018, 15:30
Lattice QCD is the only feasible way to study topological effects of QCD above $T_\mathrm c$. Especially at high temperatures, the topological susceptibility has important implications for the properties of axion dark matter. However, at high temperatures there arise difficulties in the lattice calculation, namely poor sampling of non-zero topological sectors. We discuss these problems and...
Dr
Stefano Carignano
(ICE)
28/06/2018, 17:00
We present compact expressions for the power corrections to the hard thermal loop (HTL) Lagrangian of QED in d space dimensions. These are corrections of order (L/T)^2, valid for momenta L << T, where T is the temperature. In the limit d → 3 we achieve a consistent regularization of both infrared and ultraviolet divergences, which respects the gauge symmetry of the theory. We also discuss how...
jean-loic kneur
(L2C Montpellier France)
28/06/2018, 17:30
We will illustrate how our recently developed renormalization group optimized perturbation theory (RGOPT) resums perturbative expansions in thermal field theories. The convergence and scale dependence of RGOPT thermodynamical quantities are drastically improved as compared to standard perturbative expansions, and it cures the odd drastic scale dependence observed in other related methods such...
Philipp Schicho
(AEC, ITP, U. Bern)
28/06/2018, 18:00
We consider effects induced by dimension-six operators in the dimensionally reduced effective theory for thermal QCD ("EQCD"). In particular we demonstrate, through 1-loop and 2-loop computations including dimension-six vertices, that their effects are in general of the same order or larger than 3-loop effects from non-zero Matsubara modes that have recently been determined by Ghisoiu and Schröder.
Helena Kolesova
(University of Stavanger)
29/06/2018, 14:30
The so-called chiral soliton lattice was recently found to describe the ground state of the dense QCD matter in strong magnetic fields. Such a state consists of a periodic array of topological solitons, spontaneously breaks the parity and the translational symmetry and is known to appear also in condensed-matter systems such as chiral magnets. Motivated by the fact that the QCD-like theories...
Prof.
Nelson Braga
(Universidade Federal do Rio de Janeiro)
29/06/2018, 15:30
It is important to understand the properties of heavy vector mesons inside a thermal medium. One of the reasons is that the fraction of such particles detected after a heavy ion collision can provide information about the formation of a plasma state.
An interesting framework for estimating the degree of dissociation of heavy mesons in a plasma is the holgraphic approach.
We will discuss...
Prof.
Chris Allton
(Swansea University)
29/06/2018, 16:00
The radius of the proton has been studied using several techniques. Methods using electron scattering and the atomic spectrum of electronic hydrogen have both produced values compatible with r_E = 0.8751(51)fm. Note that the spectroscopy method relies on being able to measure the transition energies accurately enough that the influence of the finite size of the proton can be discerned. More...
