The Iberian Gravitational Waves Meeting, (IberianGW2019) is an international conference organised yearly by different members of the Red Temática de Ondas Gravitacionales (REDONGRA). In 2019 it will take place in Santiago de Compostela, organized by the Instituto Galego de Física de Altas Enerxías, IGFAE.

The 2nd edition of the joint Workshop LIP/IGFAE consolidate the long tradition of scientific cooperation between researchers from the two institutes, both national and international references on High-Energy Physics. It follows the previous edition

We study the $q-\overline{q}$ potential in strongly coupled non-conformal field theories with a non-trivial renormalization group flow via holography.

We focus on the properties of this potential at an inter-quark separation L large compared to the characteristic scale of the field theory. These are determined by the leading order IR physics plus a series of corrections, sensitive to the properties of the RG-flow. To determine those corrections, we propose a general method applying holographic Wilsonian renormalization to a dual string. We apply this method to examine in detail two sets of examples, 3+1-dimensional theories with an RG flow from an IR fixed point driven by an irrelevant deformation; and theories that are confining in the IR. We discuss the physical interpretation of these results and how could they be used to check our understanding of confinement in gauge/gravity duals using lattice QCD.

Hai máis de 100 anos, Einstein predixo que o espazo-tempo era dinámico, e había "ondas gravitacionais" que viaxaban á velocidade da luz. O 14 de setembro do 2015, os dous observatorios de LIGO en EEUU detectaron por primeira vez un sinal que atravesaba a Terra, causado polo abrazo final de dous buratos negros que bailaran un tango fai uns 1.300 millóns de anos. Desde entón, detectáronse varios sinais máis, incluíndo un con "fogos artificiais" orixinados pola colisión de dúas estrelas de neutróns, axudándonos a entender a orixe dos metais pesados (¡e preciosos!). Esta charla contará a longa e incrible historia desde descubrimento e o futuro deste novo campo da astronomia.

O evento poderá seguirse en directo a través da USC TV

Como actividad complementaria a la exposición "Cosmoloxías", el Centro ABANCA Obra Social (Praza de Cervantes, Santiago de Compostela), acogerá un coloquio entre la artista Irene Dubrovsky y distintas figuras del mundo del arte y la ciencia el 6 de marzo a las 19:30 h. En él participarán el escritor Agustín Fernández Mallo, el físico y pintor David Crooks, la decana de la Facultad de Matemáticas Elena Vázquez Cendón, el físico José Edelstein y la cantante Uxía, además de la propia artista y la moderadora del encuentro, la periodista Ainhoa Apestegui.

La obra de la artista plástica Irene Dubrovsky es protagonista de la primera actividad de ArtLAB, una nueva iniciativa interdisciplinar del Instituto Gallego de Física de Altas Energías (IGFAE), cuyo objetivo es aunar arte y ciencia, indagar en sus intersecciones y tender puentes entre ambas, acercando la ciencia a la sociedad desde un punto de vista diferente.

La exposición “Cosmoloxías” se está presentando actualmente en Santiago de Compostela, en la sala más noble de la Universidad y de mayor visibilidad de la ciudad. Se compone de un conjunto de 15 pinturas y una instalación. La artista utiliza la tradición visual de la cartografía para abordar aspectos de la cosmología, tomando los mapas actuales del CMB entre otros temas. Son piezas elaboradas en un lenguaje minucioso y complejo con una fuerte base geométrica, que presenta en formatos bidimensionales y tridimensionales.

After a general review of the notion and usage of entanglement entropy in quantum field theory, we will discuss how holography can be employed to characterize the renormalization group flows of quantum information. We concentrate on the analysis of mutual information between strips and we will introduce the concept of extensivity. The holographic model employed is dual to the Chern-Simons ABJM theory coupled to massive flavors (based on 1811.09500).

Masterclass "Day of Women and Girls in Science"

We present an analytical calculation of the two-point and single-point correlators of the energy-momentum tensor associated to the gluon field produced in ultra-relativistic heavy ion collisions at early times, known as Glasma. Our approach is based on a high-energy approximation of QCD, the Color Glass Condensate effective theory, which allows us to map the fluctuations of the valence color sources in the colliding nuclei to those of the produced gluon fields via the solution of the classical Yang-Mills equations. We show that the color screening of the correlations in the transverse plane occurs at distances larger than indicated by previous calculations performed under the Glasma Graph approximation. These results also challenge the conjectured physical picture of Glasma flux tubes or color field domains.

Some recent works have suggested that the apparent thermalization found in the $p^{\mathrm{t}}$ distributions of charged particles in hadronic collisions may be related to an entanglement between the probed hard region and the rest of the colliding system. The universal proportionality found between the hard and soft temperatures, arising even at the scales of the Higgs production, is extended for the case of Pb-Pb collisions at different centralities and making connection with the clustering of color sources.

Finally, we will try to relate these findings with a stochastic treatment, through Langevin equations, of the string tension in the Schwinger's mechanism, and compute the resulting Von Neumann entropy.

In this picture, then, the link between the soft and hard scales is related to the effect of the string tension fluctuations in the probed (hard) and unprobed (soft) regions.

hep-ph/1805.12444 hep-ph/1809.04409