Dr
Assumpta Parreño
(ICC-UB), Dr
Ignasi Ribas
(ICE, IEEC-CSIC), Mr
Jordi Portabella
(La Caixa), Dr
Ramon Miquel
(IFAE)
25/06/2018, 09:00
9:00- 9:12 Sr. **Jordi Portabella**, Director de l’Àrea de Divulgació Científica i CosmoCaixa, de la Fundació Bancària “la Caixa”
9:13-9:25 Dr. **Ignasi Ribas**, director del Institut d’Estudis Espacials de Catalunya (IEEC) i vice-director del Instituto de Ciencias del Espacio (ICE, CSIC)
9:26-9:38 Dr. **Ramon Miquel**, director del Institut de Física d’Altes Energies
9:38-9:45 Dra....
Prof.
Mark Alford
(Washington University in St. Louis)
25/06/2018, 09:45
I will describe what the standard model leads us to expect for the densest phase of matter: quark matter. Quark matter is predicted to have a rich phase structure, including color superconductors, superfluids, insulators, and crystals.
Quark matter may exist in nature, formed in the ultra-compressed cores of neutron stars: I will review the search for signatures of its presence.
Prof.
David Mateos
(ICREA & U of Barcelona)
25/06/2018, 11:00
A massive experimental effort will be devoted in the coming years to the physics of QCD at high energy density and/or high baryon density. Understanding this physics, especially out of equilibrium, is an important theoretical challenge. I will discuss how holography can help us address this challenge. Topics covered will include the far-from-equilibrium dynamics near the QCD critical point and...
Prof.
Paulo Bedaque
(University of Maryland College Park)
25/06/2018, 11:45
We will discuss a programme to circumvent the ``sign problem" in lattice calculations in field theory. The main idea is to deform the region of integration in field space to the complex domain. The theoretical underpinnings and algorithms will be exemplified through the application of the method to low dimensional finite density models and real time calculations.
Prof.
Mikhail Stephanov
(UIC)
25/06/2018, 12:30
The search for the QCD critical point in heavy-ion collision
experiments requires dynamical modeling of the bulk evolution of the
QCD matter as well as of the fluctuations near the critical
point. Critical slowing down means that fluctuations are significantly
deviating from equilibrium near the critical point. We generalize
hydrodynamics to quasi-equilibrium conditions where the state of...
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
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
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
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,...
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...
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...
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...
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...
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.
Prof.
Nils Andersson
(University of Southampton)
26/06/2018, 09:00
Gravitational waves may drive the oscillations of a rotating neutron star unstable. In turn, the angular momentum carried away by the waves would spin the star down. This mechanism may determine the spin evolution of newly born neutron stars. It may also set a speed limit for neutron stars that accrete matter (and gain angular momentum) from a binary companion. In this talk I will provide an...
Prof.
Luciano Rezzolla
(University of Frankfurt)
26/06/2018, 09:45
I will discuss the rapid recent progress made in modelling neutron stars in binary system and show how the inspiral and merger of these systems is more than a strong source of gravitational waves. Indeed, while the gravitational signal can provide tight constraints on the equation of state for matter at nuclear densities, the formation of a black-hole--torus system can explain much of the...
Dr
Alfredo Urbano
(INFN, sez. di Trieste and CERN)
26/06/2018, 11:00
Axions are ubiquitous in beyond the Standard Model theories, ranging from ordinary QCD to exotic string theory constructions.
In this talk, I will present and discuss -- both from a theoretical and a phenomenological viewpoint -- their rich interplay with General Relativity in relation with gravitational wave astrophysics and cosmology.
Stephan Huber
(University of Sussex)
26/06/2018, 11:45
I will discuss phase transitions at the TeV scale, in particular the electroweak one (in extensions of the standard model). I will review the current status of how gravitational waves are generated during the phase transition, and show how the resulting gravitational wave signal can be computed from key properties of the transition. Finally, I will discuss detection prospects at future...
Tyler Gorda
(University of Helsinki)
26/06/2018, 12:30
The LIGO/Virgo detection of gravitational waves originating from a neutron-star (NS) merger, GW170817, has recently provided new stringent limits on the tidal deformabilities of the stars involved in the collision. In this talk, I will discuss recent analysis of the implications of this measurement for the NS-matter equation of state (EoS). In our analysis, we combinine this measurement with...
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...
Dr
Michal Heller
(MPI for Gravitational Physics (Albert Einstein Institute) / National Centre for Nuclear Research)
26/06/2018, 15:00
Understanding hydrodynamization in microscopic models of heavy-ion collisions has been an important topic in current research. Many lessons obtained within the strongly-coupled (holographic) models originate from the properties of transient excitations of equilibrium encapsulated by short-lived quasinormal modes of black holes. The aim of this talk is to develop similar intuition for expanding...
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...
Prof.
Thomas Schaefer
(North Carolina State University)
26/06/2018, 15:30
We revisit the calculation of long time tails in non-relativistic fluid dynamics. We show how to compute long time tails and bounds on transport coefficients in the shear, bulk, and thermal diffusivity channel. We study the constraints from scale invariance, and we show how the calculations can be extended to account for critical behavior.
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...
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...
Prof.
Pavel Kovtun
(University of Victoria)
26/06/2018, 16:00
I will talk about relativistic thermodynamics and magneto-hydrodynamics, with an emphasis on the derivative expansion, the transport coefficients, and the Kubo formulas.
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.
Prof.
Margaret Carrington
(Brandon University)
26/06/2018, 17:00
Non-perturbative techniques are needed to study strongly coupled systems. One powerful approach is the n-particle irreducible effective action. The technique provides a systematic expansion for which the truncation occurs at the level of the action. However, renormalisation using a standard counterterm approach is not well understood. At the 2PI level one must introduce multiple counterterms,...
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...
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,...
Dr
Florian Preis
(Technische Universität Wien)
26/06/2018, 17:30
We discuss recent developments in the semiholographic model for heavy ion collisions (HICs) proposed by Iancu and Mukhopadhyay and further developed by Mukhopadhyay, FP, Rebhan, and Stricker. In this approach a GLASMA description of the early stages of HICs, i.e. a classical Yang-Mills field theory is coupled to a holographic model which plays the role of a bath of strongly coupled gluons. We...
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.
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).
Dr
maximilian attems
(Universidad de Santiago de Compostela)
26/06/2018, 18:00
Ever since the discovery of the quark-Gluon plasma (QGP) the location of the critical point in the QCD phase diagram - the end point of the first-order transition between hadron matter and QGP - has been a main research goal for heavy-ion collisions experiments. We use the gauge/gravity duality to study as first a four-dimensional, strongly-coupled gauge theory with a first-order thermal phase...
Prof.
Barry Barish
(Caltech)
26/06/2018, 19:00
Albert Einstein predicted the existence of gravitational waves 100 years ago, but the effects are so tiny that even Einstein thought they could never be detected. After 40 years of controversy, theorists finally developed a consensus that they really do exist. Then the problem became whether experimental physicists could develop instruments sensitive enough to actually detect them? The Laser...
Dr
Jan Fiete Grosse-Oetringhaus
(CERN)
27/06/2018, 09:00
I will review the latest experimental results of heavy-ion physics, focussing on results from the Large Hadron Collider (LHC) and the Relativistic Heavy-Ion Collider (RHIC).
A particular emphasis is given on the topic of collectivity in small systems, i.e. the paradigm-shifting observation that experimental signatures traditionally associated with the production of a large and deconfined...
Prof.
Paul Romatschke
(University of Colorado Boulder)
27/06/2018, 09:45
Having a thermalized system is the textbook requirement for the
applicability of hydrodynamics. However, there is mounting evidence
that hydrodynamics offers a good quantitative description even in
off-equilibrium situations. Recent applications of resurgence to
relativistic fluid dynamics in the context of conformal systems is
able to put the new, generalized theory of off-equilibrium...
Dr
Jacopo Ghiglieri
(CERN)
27/06/2018, 11:45
I will give an overview of the determination of the transport coefficients of QCD at next-to-leading order. It is known that leading-order perturbative computations give values of the shear viscosity over entropy density ($\eta/s$) that are significantly larger than phenomenological values and AdS/CFT computations. I will thus explain the recent improvements in our understanding of thermal...
Peter Arnold
(University of Virginia)
27/06/2018, 12:30
High-energy particles passing through matter lose energy by showering via splitting processes such as hard bremsstrahlung and pair production. There has been a great deal of research in the last 5 years on what happens if two successive splittings in such a shower overlap quantum mechanically, so that their splitting probabilities cannot be treated independently. The effects of soft...
Prof.
Geraldine Servant
(U. Hamburg and DESY)
28/06/2018, 09:00
The nature of the electroweak phase transition is still weakly constrained experimentally and many possibilities remain open, in particular when the scalar sector of the theory is extended. There has been growing interest lately in the possibility of a strong first-order electroweak phase transition, not only because of its relevance for baryogenesis but also because it is a potential source...
Dr
Szabolcs Borsanyi
(University of Wuppertal)
28/06/2018, 09:45
Axions are hypothetical particles that solve
the strong CP problem, and contribute to the dark matter
at the same time. A key input is the axion potential, that
depends on the topological susceptibility in quantum chromodynamics.
I discuss various lattice computations to the calculation
of this quantity and its impact on the axion search.
Prof.
Harvey Meyer
(Johannes Gutenberg University Mainz)
28/06/2018, 11:00
We investigate the emission rate of photons in a perfectly thermalized
quark-gluon plasma via lattice QCD correlation functions of the
electromagnetic current. The thermal correlation functions can be
split into a spatially longitudinal and a transverse part, and the
photon rate is determined by the transverse part, since the
longitudinal part vanishes at light-like kinematics. However,...
Miguel Ángel Escobedo Espinosa
(University of Jyväskylä)
28/06/2018, 11:45
Heavy quarkonium related observables are very useful to obtain information about the medium created in relativistic heavy ion collisions. In recent years the theoretical description of quarkonium in a medium has moved towards a more dynamical picture in which decay and recombination processes are very important. In this talk we will discuss the equations that describe the evolution of the...
Mikko Laine
(AEC, ITP, U. Bern)
28/06/2018, 12:30
There has been recent interest in leptogenesis induced by "light"
right-handed neutrinos, with masses in the 1 - 100 GeV range. We
review the form of rate equations applying to this system, as well as
the computation of rate coefficients to leading order in Standard
Model couplings. The resulting non-linear system is solved
numerically, taking into account that right-handed neutrinos...
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...
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...
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...
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...
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...
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...
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...
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.
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.
Prof.
Anders Tranberg
(University of Stavanger)
29/06/2018, 09:45
A strong Electroweak Phase Transition may be responsible for the observed baryon asymmetry of the Universe and may generate a detectable stochastic background of Gravitational Waves. Sadly, in the Minimal Standard Model, the transition is a weak cross-over. I will first give a short introduction to how one computes the properties of the transition perturbatively and non-perturbatively. I will...
Dr
Aleksey Cherman
(INT, University of Washington)
29/06/2018, 11:00
I'll review some recently-appreciated lessons from thinking about QCD and related theories on compactified directions with non-thermal boundary conditions. For example, such non-traditional compactifications sometimes allow one to define new analytically tractable regimes in gauge theory, which yield insights into the appearance of mass gaps, chiral symmetry breaking, and other dynamical phenomena.
Prof.
Maciej Lewenstein
(ICFO - Institut de Ciéncies Fotóniques)
29/06/2018, 11:45
I my lecture I will discuss the present status of one of the pillars of the Quantum Technologies Flagship: Quantum Simulations. I will comment on various platforms and approaches, focusing, however, on ultra-cold atoms, molecules and ions. I will present the recent progress in the most challenging quantum simulations of lattice gauge theories
and speculate about the future directions, such as...
Prof.
Javier L Albacete
(Universidad de Granada)
29/06/2018, 12:30
Funding opportunities from the European Research Council
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...
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...
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,...
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...
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...
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...
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.
