Carlos Pajares Vales
(Universidade de Santiago de Compostela (ES))
08/09/2015, 09:00
Antonio Pich
(University of Valencia)
08/09/2015, 09:15
Strongly-coupled electroweak scenarios are characterized by a spectrum of massive states at high scales. Using effective field theory techniques, we analyse their phenomenological implications at low energies. Integrating out the heavy particles, one gets a definite pattern of low-energy couplings in the resulting effective Lagrangian, which depends on the quantum numbers associated with the...
Antonio Dobado
(Universidad Complutense (ES))
08/09/2015, 09:45
The current data concerning the Higgs discovered at the LHC are compatible with having a strongly interacting electroweak symmetry breaking dynamics for the Higgs and the would-be Goldstone bosons. In this work we review this possibility and the consequences for LHC II.
Prof.
Joan Solà
(Universitat de Barcelona)
08/09/2015, 10:15
An accelerated universe should naturally have a vacuum energy density determined by its dynamical curvature. The so-called cosmological constant is most likely a temporary description of a cosmic variable that has been drastically evolving from the early inflationary era to the present. In this talk, I will discuss a unified picture (in fact a class of models) of the expansion history of our...
Domenec Espriu Climent
(University of Barcelona (ES))
08/09/2015, 11:30
We study the Dine-Fischler-Srednicki (DFS) model in the light of the recent Higgs LHC results and electroweak precision data. The DFS model is a natural extension of the two-Higgs doublet model endowed with a Peccei-Quinn symmetry and leading to a physically acceptable axion. For generic couplings, the model reproduces the minimal Standard Model showing only tiny deviations (extreme decoupling...
Sergey Afonin
(Saint Petersburg State University)
08/09/2015, 12:00
One of the most known result of the string theory consists in the
idea that some strongly coupled gauge theories may have a dual
description in terms of a higher dimensional weakly coupled
gravitational theory --- the so-called AdS/CFT correspondence or
gauge/gravity correspondence. The attempts to apply this idea to
the real QCD are often referred to as "holographic QCD" or
"AdS/QCD...
Prof.
Alfonso Ramallo
(University of Santiago de Compostela)
08/09/2015, 12:30
After a brief review of the Landau Fermi liquid theory, we will discuss a holographic modeling of cold matter in terms of D-brane intersections. We will analyze the different regimes of these systems as a function of the temperature and, in particular, their zero-sound and diffusion modes.
Prof.
Manuel Asorey
(Universidad de Zaragoza)
08/09/2015, 14:30
We will review the latest developments on global properties of
the renormalization
group flow in different space-time dimensions (c-theorem, a-theorem and
F-theorem).
In particular, we will address the case of odd dimensions where new
entropic conjectures
have been recently formulated.
Prof.
Joaquin SANCHEZ-GUILLEN
(USC)
08/09/2015, 15:00
The foundations of new Skyrme models with integrability and BPS properties, are presented. Their main applications for hadrons, nuclei and nuclear matter are briefly reviewed. A new field theortical thermodinamics and a geometric theory of matter are thereby established and explained.
Prof.
Yuri Pismak
(Saint-Petersburg State University)
08/09/2015, 16:40
The results obtained in the models of interaction 2-dimensional material
objects with QED fields, constructed on the basis of Symanzik approach
are presented. The possibility of applications of such methods for modeling
the interaction of photons and electrons with hadrons and nuclei is discussed.
Sergey Vernov
(Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow Stat)
08/09/2015, 17:00
Prof.
Francisco Fernandez
(Universidad de Salamanca)
08/09/2015, 17:20
The discovery of the $X(3872)$ by the Belle collaboration [1] and its confirmation by BaBar and CDF has provided the best candidate to an exotic structure in the meson sector. Because of its proximity to the $D^*D$ threshold a description of this state in terms of a $c\bar c$ state coupled to a $D^*D$ molecular structure seems to be natural.
For the heavy quark sector, the spin-dependent...
Andrey Slavnov
(Steklov Mathematical Institute and Moscow State University)
09/09/2015, 09:00
A new method of
quantization of the nonabelian gauge theories is reviewed
4.
Summation of UV divergences in maximally supersymmetric Yang-Mills theories in diverse dimensions
Prof.
Dmitry Kazakov
(JINR)
09/09/2015, 09:30
We consider the UV divergences in scattering amplitudes in maximally supersymmetric Yang-Mills theories in diverse dimensions: (D=6, N=2), (D=8, N=1) and (D=10, N=1) cases. The recurrence relation is found that allows one to get the leading divergences in all orders of PT for the four point amplitude. It is checked by explicit calculations in several loops. Infinite summation of the leading...
Dr
Mateos Guilarte Juan
(Universidad de Salamanca)
09/09/2015, 10:00
Many phenomena in statistical physics and quantum field theory are effectively described by means of spectral zeta function techniques.
In particular, one-loop quantum fluctuations around classical backgrounds engender divergences that may be regularized via spectral zeta function
analytic continuation regularization. Tipically, in solitonic and/or gravitational backgrounds, e.g., magnetic...
Ekaterina Pozdeeva
(SINP MSU)
09/09/2015, 10:20
The possibility to construct inflationary models for the
renormalization-group (RG) improved potentials corresponding to
scalar electrodynamics and to SU(2) and SU(5) models is
investigated. In all cases, the tree-level potential, which
corresponds to the cosmological constant in the Einstein frame, is
seen to be nonsuitable for inflation. Rather than adding the
Hilbert-Einstein term to...
Vladimir Andrianov
(University of St Petesburg)
09/09/2015, 11:20
Alexander Andrianov
(Saint Petersburg State University)
09/09/2015, 11:50
According to modern observational data the phantom equation of
state for dark energy is not excluded. This scenario creates problems
with stability of universe evolution. An alternative to phantom
models is given by models of scalar matter with non-Hermitian, PTsymmetric
interaction[1]. In this talk we present the set of such models
with several scalar fields which are exactly...
Prof.
J. Luis Miramontes
(Universidade de Santiago de Compostela)
09/09/2015, 12:10
I will summarize recent work aimed to show that sigma models on
(semi-)symmetric spaces F/G admit discrete integrable deformations that can
be viewed as deformations of the F/F gauged WZW model. For the AdS(5)xS(5) world-sheet theory, F=PSU(2,2|4) and the resulting theory has just the right
amount of kappa-symmetries, which points to the existence of a new fully
consistent deformed string...
Oleg Novikov
(Saint-Petersburg State University, V.A.Fock Department of Theoretical Physics)
09/09/2015, 12:30
The model of scalar matter that permits the formation of a domain wall (thick brane) is studied. The potential of the scalar matter is assumed to have $O(N)$ symmetry softly broken by terms quadratic in fields. One of the fields develops delocalized kink background while others may or may not form localized configurations depending on the relative values of the parameters. We present exact...
Prof.
Lev Lipatov
(Petersburg Nuclear Physics Institute)
10/09/2015, 09:00
The theory of high energy processes in QCD is based on the
gluon reggeization. In particular, Pomeron and Odderon are composite
states of two and three reggeized gluons, respectively. We discuss the
effective action and corresponding classical equations for quarks and
gluons interacting with reggeized gluons. In the extended N=4
supersymmetric gauge model the Pomeron is dual to the...
Prof.
Mikhail Braun
(Department of High Energy Physics, Saint-Petersburg State University, S. Petersburg, Russia)
10/09/2015, 10:30
High-energy collisions of two nucleons on two nucleons are studied in the
BFKL approach in the leading approximation in $\alpha_sN_c$.
Total cross-section as well as single and double inclusive cross-sections
for gluon production are considered.
Diagrams both with and without redistribution of colour are taken into account.
It is found that intermediate BKP states consisting of 4...
Dr
Grigori Feofilov
(Saint-Petersburg State University)
10/09/2015, 11:20
\documentclass[]{article}
\begin{document}
\title{
Repulsion of quark-gluon strings and collective effects in two-particle angular long-range correlations in hadronic collisions
}
\author{
I.G.Altsybeev, G.A.Feofilov\\
{\it \small Saint-Petersburg State University}\\
}
\date{}%draft v0.2}
\maketitle
Color flux tubes (quark-gluon strings), formed at early stages of...
Carlos Pajares Vales
(Universidade de Santiago de Compostela (ES))
10/09/2015, 11:40
Vladimir Vechernin
(Saint-Petersburg State University)
10/09/2015, 12:00
The explicit analytical expression for the asymptotic of the correlation coefficient between mean event transverse momenta of charged particles produced in separated rapidity intervals is derived. The asymptotic at large string density is obtained in the model with string fusion by introducing a lattice in the transverse plane and assuming the translational invariance of the particle...
Igor Altsybeev
(St. Petersburg State University (RU))
10/09/2015, 12:20
I. Altsybeev for the ALICE Collaboration.
The strength of forward-backward (FB) multiplicity correlations is measured by the ALICE detector in proton-proton collisions at $\sqrt{s}=0.9$, 2.76 and 7 TeV.
Such correlations are considered to be a powerful tool for the exploration of the initial conditions of hadronic interactions.
The measurement is performed in the central pseudorapidity...
Vladimir Kovalenko
(St. Petersburg State University (RU))
10/09/2015, 12:40
The exploration of the QCD phase diagram and a search for the critical point is one of the main subjects of heavy ion physics. The experimental investigation of the phase diagram of a strongly interacting matter is related to the study of the fluctuations and correlations of observables in the nuclear collisions at high energy. Around the critical point, enhanced fluctuations are expected to...
Joaquim Gomis
(Universitat de Barcelona)
10/09/2015, 14:30
We investigate particles whose dynamics are invariant under the (AdS) Carroll group.
Although a single free (Ads) Carroll particle.has non-trivial dynamics, there is non-trivial
dynamics when there is a coupling to background Carroll gauge fields or when we consider two particles. The extension to the supersymmetric case will be considered. The construction of a Carroll string will be...
Jose R. Pelaez
(Universidad COmplutense)
10/09/2015, 15:00
In this talk I will review the present status of the lightest scalar meson resonance, which has been a controversial state for many decades despite playing a central role in our understanding of the QCD spontaneous symmetry breaking and the nucleon-nucleon attraction. Recently, the debate about its existence and parameters has been finally settled.
In addition, there are strong indications...
Mr
Manoel Rodríguez Calvo
(Universidade de Santiago de Compostela)
10/09/2015, 15:30
Multiple gluon emissions of a high energetic parton passing through a hot and dense QCD medium are usually assumed to be independent and given by iterating the well-studied single inclusive gluon emission. However, it is known that interferences among different emitters in the parton cascades are known to lead to angular ordering of gluon emissions in the vacuum. Motivated by this, we consider...
Angel Gomez Nicola
(Universidad Complutense Madrid)
10/09/2015, 16:40
I will discuss recent progress in low-energy QCD at finite temperature regarding chiral symmetry restoration and properties of meson gases relevant for Heavy-Ion Physics and lattice simulations. In particular, I will present a recent analysis of scalar and pseudo-scalar susceptibilities $\chi_S$ and $\chi_P^a$, which allows to understand chiral partner degeneration at chiral symmetry...
Xavier Viñas
(Universidad de Barcelona)
10/09/2015, 17:20
Dmitry Gridnev
(Saint Petersburg State University)
10/09/2015, 17:30
Mr
Antonio J. Cuesta
(Institut de Ciències del Cosmos - Universitat de Barcelona)
11/09/2015, 09:00
The tiny inhomogeneities left over from the inflationary phase seeded the early Universe with primordial density perturbations. The photon-baryon fluid reacted to these perturbations by forming spherical pressure waves known as baryon acoustic oscillations (BAO). These waves propagated through the primordial plasma until the Universe became transparent to radiation, effectively stopping the...
Jaime Alvarez-Muniz
(Universidad de Santiago de Compostela)
11/09/2015, 09:20
The observation of ultrahigh energy neutrinos has become a priority in experimental Astroparticle Physics. They can be detected with a variety of techniques. In particular,
neutrinos can interact in the atmosphere or in the Earth's crust, producing air showers
that can be observed with arrays of detectors at the ground. With the Surface Detector of the Pierre Auger Observatory we are...
Manuel Masip
(Universidad de Granada)
11/09/2015, 09:40
IceCube has published the observation of 37 events of TeV-PeV energies. We show that the angular distribution, the spectrum and the muon to shower ratio of these events can not be explained by atmospheric neutrinos. On the other hand, IceCube's interpretation in terms of a diffuse astrophysical flux with $E^{-2}$ spectrum implies events at the Glashow resonance (6.4 PeV) that have not been...
Prof.
Emilio Elizalde
(ICE-CSIC and IEEC, Barcelona)
11/09/2015, 10:00
What drives the acceleration of the Universe expansion? Dark energy, of course, but what is it? Beautiful mathematics, involving the zeta function of pseudodifferential operators, are key in answering this question. After summarizing the uses of the zeta function for the definition of regularized traces and determinants, the motivations behind the celebrated Chowla-Selberg formula will be...
Irina Aref'eva
(Steklov mathematical Institute)
11/09/2015, 10:20
Valery Rubakov
(Ins. for Nuclear Research, Ras, Moscow)
11/09/2015, 10:40
Ines Valino
(University of Santiago de Compostela)
11/09/2015, 11:30
We highlight the main results obtained by the Pierre Auger Collaboration in its quest to unveil the mysteries associated with the nature and origin of the highest-energy cosmic rays. The observatory has steadily produced high-quality data for more than 10 years, which have already led to a number of major breakthroughs in the field contributing to the advance of our understanding of these...
Alexei Starobinsky
(Landau Inst. of Theoretical Physics, RAS, Moscow)
11/09/2015, 12:30
Carlos Naya Rodriguez
(Universidade de Santiago de Compostela (ES))
Xavier Viñas
(Universidad de Barcelona)
Sergey Kolevatov
(SPbSU)
Francisco Fernandez
(Universidad de Salamanca)
Antonio Pich
(University of Valencia)
Yuri Pismak
(University of St. Petesburg)
Ricardo Vázquez
(Universidade de Santiago de Compostela)
Joan Sola
(Universitat de Barcelona)
Antonio Pich
(University of Valencia)
Ines Valino
(University of Santiago de Compostela)
