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BEGIN:VEVENT
SUMMARY:Comparison of the predictions of the pc-GR to the observations of
the EHT
DTSTART;VALUE=DATE-TIME:20190508T153000Z
DTEND;VALUE=DATE-TIME:20190508T160000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403578@indico.cern.ch
DESCRIPTION:Speakers: Peter Hess (Universidad Nacional Autónoma de Méxic
o)\nThe observation predictions of the pseudo-complex General Relativity\,
related to the structure of an accretion disk\, are compared to the repor
ted observations of the Event Horizon Telescope.\n\nhttps://indico.cern.ch
/event/721602/contributions/3403578/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403578/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Cosmic matter in the laboratory - Investigating neutron star core
densities with FAIR
DTSTART;VALUE=DATE-TIME:20190508T142000Z
DTEND;VALUE=DATE-TIME:20190508T144000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403728@indico.cern.ch
DESCRIPTION:Speakers: Christian Sturm (GSI Helmholtzentrum fuer Schwerione
nforschung)\nThe Facility for Antiproton and Ion Research\, FAIR\, is pres
ently being constructed adjacent to the existing accelerator complex of th
e GSI Helmholtz Centre for Heavy Ion Research at Darmstadt/Germany\, expan
ding the research goals and technical possibilities substantially. The wor
ldwide unique accelerator and experimental facilities of FAIR will open th
e way for a broad spectrum of unprecedented fore-front research supplying
a large variety of experiments in hadron\, nuclear\, atomic and plasma phy
sics as well as biomedical and material science which will be briefly desc
ribed in this presentation. Emphasis will be put on the investigation of t
he highest baryon densities accessible in the laboratory by relativistic n
ucleus-nucleus collision at FAIR energies\, probing strongly interacting m
atter under extreme conditions as we expect inside neutron stars.\n\nhttps
://indico.cern.ch/event/721602/contributions/3403728/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403728/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Directed\, elliptic and triangular flow of free protons and deuter
ons in Au+Au reactions at 1.23 A GeV
DTSTART;VALUE=DATE-TIME:20190507T140000Z
DTEND;VALUE=DATE-TIME:20190507T142000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403579@indico.cern.ch
DESCRIPTION:Speakers: Paula Hillmann ()\nRecently\, the HADES experiment a
t GSI has provided preliminary data on the directed flow\, $v_1$ elliptic
flow\, $v_2$ and triangular flow\, $v_3$ of protons in Au+Au reactions at
a beam energy of 1.23 A GeV. Here we present a theoretical discussion of t
hese flow harmonics within the UrQMD transport approach. We show that all
flow harmonics\, including the triangular flow\, provide a consistent pict
ure of the expansion of the system\, if potential interactions are taken i
nto account. Cluster formation has a large contribution to the physics of
collective flow. Therefore\, the flow of deuterons and free protons are co
mpared. Investigating the dependence of the flow harmonics on the nuclear
interaction potentials it is shown that especially $v_3$ can serve as a se
nsitive probe for the nuclear equation of state at such low energies. The
triangular flow and its excitation function with respect to the reaction-p
lane were calculated for the first time and indicate a complex interplay o
f the time-evolution of the system and the initial conditions at low beam-
energies. Our study also indicates a significant softening of the equation
of state at beam energies above E lab > 7 A GeV which can be explored by
at the future FAIR facility.\n\nhttps://indico.cern.ch/event/721602/contri
butions/3403579/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403579/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Generalized SU(2) Proca inflation
DTSTART;VALUE=DATE-TIME:20190507T185000Z
DTEND;VALUE=DATE-TIME:20190507T191000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403580@indico.cern.ch
DESCRIPTION:Speakers: Yeinzon Rodriguez Garcia (UAN & UIS (Colombia))\n
The generalized SU(2) Proca theory is the only modified gravity theory\, n
owadays\, able to accommodate in a natural way a configuration of vector f
ields which is compatible with the homogeneous and isotropic nature of our
Universe. In previous works\, we have been able to uncover a self-tuning
mechanism that drives an eternal slow-roll inflationary period for an amp
le spectrum of initial conditions. We have made a little and justified mo
dification to the action so that the mentioned self-tuning mechanism is pr
eserved but now the inflationary period has a graceful exit and is long en
ough to solve the classical problems of the standard Cosmology. The actio
n is free of tachyonic\, ghost\, and Laplacian instabilities\, and\, in ad
dition\, provides a non-anomalous speed for the gravity waves. The usual
naturalness problem of the primordial inflation in this scenario is\, ther
efore\, essentially absent.\n\nhttps://indico.cern.ch/event/721602/contrib
utions/3403580/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403580/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Lie-Backlund transformations for residual symmetries in General Re
lativity
DTSTART;VALUE=DATE-TIME:20190507T191000Z
DTEND;VALUE=DATE-TIME:20190507T193000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403581@indico.cern.ch
DESCRIPTION:Speakers: Miguel Angel Marquina Carmona (CINVESTAV IPN)\nLie-B
acklund transformations have been used to extend the criteria proposed by
Ayón-Beato and Velázquez-Rodríguez for characterizing the residual sym
metries of the gravitational ansatz developed according to Lie-point trans
formations. We found that non-local Lie-Backlund transformations allows us
to obtain the more general residual symmetries of the metric. We present
the generalized criteria for finding all residual symmetries for any metri
c ansatz in general relativity.\n\nhttps://indico.cern.ch/event/721602/con
tributions/3403581/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403581/
END:VEVENT
BEGIN:VEVENT
SUMMARY:On the dynamics of rotationally supported galaxies
DTSTART;VALUE=DATE-TIME:20190507T205000Z
DTEND;VALUE=DATE-TIME:20190507T211000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403582@indico.cern.ch
DESCRIPTION:Speakers: Ramzi Suleiman (Triangle Research & Development Cent
er)\nA recent finding\, based on empirical data of 153 rotationally suppor
ted galaxies\, with very diﬀerent morphologies\, masses\, sizes\, and ga
s fractions\, revealed that the baryonic and the dark matter in galaxies a
re strongly coupled\, such that\, if the first is known\, the second follo
ws and vice versa. Here\, we propose a completely theoretical analysis of
the dynamics of rotationally supported galaxies\, which results in the sam
e conclusion. We find that the relationship between baryonic and dark matt
er densities at any radius r is governed by the law\, ρ(r)_M + ρ(r)_DM =
ρ_0\, where ρ(r)_M\, and ρ(r)_DM are\, respectively\, the densities of
matter and dark matter at radius r\, and ρ_0 is the density at the galax
y’s center. Strikingly\, we also found that the radius r_s\, at which th
e rotation velocity is equal to half of its maximal value (or alternativel
y the radius r_c at which the baryonic matter density is equal to half o
f its density at the galaxy’s center) constitutes a vivid signature of t
he galaxy\, in the sense that it reveals rich information about the galaxy
’s dynamics\, including the distribution of its matter and dark matter a
nd their total amounts in the galaxy.\n\nhttps://indico.cern.ch/event/7216
02/contributions/3403582/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403582/
END:VEVENT
BEGIN:VEVENT
SUMMARY:One-loop divergences in 7D Einstein and 6D conformal gravities
DTSTART;VALUE=DATE-TIME:20190507T183000Z
DTEND;VALUE=DATE-TIME:20190507T185000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403590@indico.cern.ch
DESCRIPTION:Speakers: Danilo Diaz (Universidad Andrés Bello)\nWithin the
context of AdS/CFT Correspondence\, we first compute one-loop infrared (IR
) divergences of 7D Einstein Gravity in a certain Poincaré-Einstein backg
round metric. We compute then the one-loop ultraviolet (UV) divergences of
6D Conformal Gravity on the boundary. We verify the equality of the above
results that stems from the IR-UV connection of the duality dictionary. K
ey ingredients are heat kernel techniques\, factorization of the boundary
higher-derivative kinetic operator for the Weyl graviton on the 6D boundar
y Einstein metric and WKB-exactness of the Einstein graviton in the chosen
7D Poincaré-Einstein background.\nIn all\, we elucidate the way in which
the 6D results containing the type-A and type-B conformal anomalies for t
he Weyl graviton are encoded in the 7D "hologram" given by the fluctuation
determinant for the Einstein graviton. We finally discuss possible extens
ions to include higher-spin fields.\n\nhttps://indico.cern.ch/event/721602
/contributions/3403590/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403590/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Stueckelberg-Horwitz-Piron (SHP) classical mechanics with evolving
local metric
DTSTART;VALUE=DATE-TIME:20190507T201000Z
DTEND;VALUE=DATE-TIME:20190507T203000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403593@indico.cern.ch
DESCRIPTION:Speakers: Martin Land (Hadassah College)\nStueckelberg-Horwitz
-Piron (SHP) theory is a framework for posing classical and quantum relati
vistic physics in canonical form with an external parameter of evolution $
\\tau$. SHP electrodynamics generalizes Maxwell theory by allowing the fou
r-vector potential to depend on $\\tau$ and introducing a scalar gauge pot
ential $a_5(x\,\\tau)$ associated with this $\\tau$-dependence. As a resu
lt\, current conservation\, wave equations\, and other scalar expressions
suggest a formal 5D symmetry that breaks to tensor and scalar representati
ons of O(3\,1) in the presence of 4D matter. Following a similar approach
\, this electrodynamic theory has recently been extended to non-abelian ga
uge symmetries and to the classical and quantum many-body problem in curve
d 4D spacetime with local metric $g_{\\mu\\nu}(x)$\, for $\\mu\,\\nu = 0\,
1\,2\,3$.\n\nIn this talk we examine another extension of classical SHP me
chanics by allowing the local metric to be $\\tau$-dependent and introduci
ng new metric components associated with $\\tau$ evolution. In order to o
btain a reasonable prescription for this generalization\, consistent with
an extended equivalence principle\, the breaking of formal 5D tensor symme
tries must be treated in detail. This extension permits us to describe pa
rticle motion in geodesic form with respect to a dynamically evolving back
ground metric. As an example\, we consider the field produced by a $\\tau
$-dependent mass $M(\\tau)$\, first as a perturbation in the Newtonian app
roximation and then for a Schwarzschild-like metric. As expected\, the ex
tended Einstein equations imply a non-zero energy-momentum tensor\, repres
enting the flow of mass energy corresponding to the changing source mass.
Moreover\, the Hamiltonian (the scalar system mass) is driven by terms pr
oportional to $dM / d\\tau$ and is not conserved. In $\\tau$-equilibrium\
, this system becomes a generalized Schwarzschild solution for which the e
xtended Ricci tensor and mass-energy-momentum tensor vanish.\n\nhttps://in
dico.cern.ch/event/721602/contributions/3403593/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403593/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Divergence-type hyperbolic theories for ultrarelativistic fluids
DTSTART;VALUE=DATE-TIME:20190507T132000Z
DTEND;VALUE=DATE-TIME:20190507T134000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403600@indico.cern.ch
DESCRIPTION:Speakers: Marcelo Enrique Rubio (IATE - CONICET)\nIn this talk
I will present a novel theory with the aim of describing the dynamics of
ultrarelativistic fluids considering dissipative effects up to second orde
r. The problem of achieving a covariant relativistic extension of the equa
tions that describe non-relativistic dissipative fluids constitutes a very
active area of current research\, given that a well-posed and causal theo
ry of viscous fluids is essential for a better description of several astr
ophysical problems\, as for example the coalescence of compact objects\, w
hich constitute nowadays the main source of gravitational wave production.
After mentioning previous attempts for covariant extensions of viscous fl
uids\, we will present a proposal for the study of the dynamic evolution o
f ultrarelative fluids. Then\, we will show how to implement the equations
of the theory numerically\, using the Kurganov-Tadmor centered method\, w
hich allows capturing discontinuous solutions that simulate shock waves\,
and show some simulations in the one-dimensional case.\n\nhttps://indico.c
ern.ch/event/721602/contributions/3403600/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403600/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Efficient cosmic-ray acceleration at reverse shocks in supernova r
emnants
DTSTART;VALUE=DATE-TIME:20190508T132000Z
DTEND;VALUE=DATE-TIME:20190508T134000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403592@indico.cern.ch
DESCRIPTION:Speakers: Satoru Katsuda (Saitama University)\nWhen a supernov
a explodes\, a blast wave is generated and propagates into the ambient med
ium\, whereas the deceleration of the ejecta by the ambient medium induces
an inward-propagating shock wave\, the so-called reverse shock (RS). If
the RSs can efficiently accelerate cosmic-rays\, then they can be importan
t production sites of heavy-element cosmic-rays. We present evidence for
efficient cosmic-ray acceleration at reverse shocks in young Galactic supe
rnova remnants including Cassiopeia A and RCW 86\, based on recent X-ray o
bservations with Chandra.\n\nhttps://indico.cern.ch/event/721602/contribut
ions/3403592/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403592/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Scale Invariance in Cosmology and Particle Physics using metric in
dependent measures of integrations in the action
DTSTART;VALUE=DATE-TIME:20190507T130000Z
DTEND;VALUE=DATE-TIME:20190507T132000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403594@indico.cern.ch
DESCRIPTION:Speakers: Eduardo Guendelman (Ben Gurion University)\nAbstract
The use of a metric independent measure of integration in the action open
s new possibilities for constructing globally scale invariant theories\, s
ince the new measure can be assigned a different scaling transformation th
an the usual metric dependent measure sqrt(-g). There are various ways to
construct a density that can serve as a metric independent measure of inte
gration\, from the derivatives of 4 scalar fields or the derivative of a t
hree index tensor field contracted with the alternating symbol. The integr
ation of the equations of motion of these "measure fields" leads to the sp
ontaneous breaking of the scale invariance. A dilaton field with exponenti
al potentials is added and coupled to the different measures. In the effec
tive Einstein frame\, potentials for the dilaton with flat regions appear\
, if curvature square terms are introduced\, two flat regions appear\, one
capable of describing inflation and the other describing the slowly accel
erated phase of the present universe. These models allow non singular cosm
ologies of the emergent type. In the context of the late universe\, it is
shown that the scale invariance is responsible for the avoidance of the 5t
h force problem that could have appeared in connection with the nearly mas
sless dilaton. Also a see saw cosmological mechanism that could explain th
e smallness of the present vacuum energy can be formulated. Finally these
techniques have been used to formulate scale invariant extensions of the S
tandard Model.\n\nhttps://indico.cern.ch/event/721602/contributions/340359
4/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403594/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Predictions of the pseudo-complex theory of gravity for EHT observ
ations: Observational tests
DTSTART;VALUE=DATE-TIME:20190508T150000Z
DTEND;VALUE=DATE-TIME:20190508T153000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403617@indico.cern.ch
DESCRIPTION:Speakers: Thomas Boller (MPE Garching)\nA modified theory of g
ravity\, avoiding singularities in the standard theory of gravitation\, ha
s been developed by Hess \\& Greiner\, known as the pseudo-complex theory
of gravitation. The pc-GR theory shows remarkable observational difference
s with respect to standard GR. The intensity profiles are significantly di
fferent between both theories\, which is a rare phenomenon in astrophysics
. This will allow robust tests of both theories using Event Horizon Telesc
ope (EHT) observations of the Galactic Center. We also predict the time ev
olution of orbiting matter. In this paper we summarize the observational t
ests we have developed to date. In case that the EHT data are public\, we
will discuss their implication on the pc-GR theory.\n\nhttps://indico.cern
.ch/event/721602/contributions/3403617/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403617/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Thermodynamic properties of a magnetized neutral vector boson gas
at finite temperature
DTSTART;VALUE=DATE-TIME:20190510T152000Z
DTEND;VALUE=DATE-TIME:20190510T154000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403640@indico.cern.ch
DESCRIPTION:Speakers: Lismary de la Caridad Suárez González (Instituto d
e Cibernética Matemática y Física\,Habana\, Cuba)\nWe study the thermod
ynamic properties of a neutral vector boson gas in presence of a constant
magnetic field at finite temperature. The study has been done considering
relativistic and non-relativistic bosons. In general\, one of the most out
standing properties of magnetized bosonic systems is the occurrence of Bos
e-Einstein condensation (BEC) and Bose-Einstein ferromagnetism: in the con
densed state\, the gas shows a spontaneous magnetization. The main purpose
of this work is to study the effect of temperature on the equations of st
ate for that matter that allows more accurate descriptions of compact obje
cts\, specifically of neutron stars\, which might contain spin-1 bosons fo
rmed up by two paired neutrons. As a limit case we study the structure of
stars fully composed by matter in this form.\n\nhttps://indico.cern.ch/eve
nt/721602/contributions/3403640/
LOCATION:Naviti Beach Club Varadero Hotel
URL:https://indico.cern.ch/event/721602/contributions/3403640/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Perturbations to planetary biospheres due to high energy muons fro
m cosmic ray bursts originated in neutron star mergers
DTSTART;VALUE=DATE-TIME:20190511T140000Z
DTEND;VALUE=DATE-TIME:20190511T142000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403620@indico.cern.ch
DESCRIPTION:Speakers: Rolando Cardenas (Universidad Central ''Marta Abreu'
' de Las Villas)\nIn this work a mathematical model for aquatic photosynth
esis\, modified by some of us to include particulate ionizing radiation\,
is used to assess the perturbations that muons coming from neutron star me
rgers could make to this biological process. It is then shown that neutron
star mergers not too far from inhabited rocky planets have the potential
to considerably deplete their aquatic photosynthesis. Some remarks concern
ing the affectation on other types of subsurface life are also done\, and
by extension some considerations on habitability of the Milky Way are pres
ented.\n\nhttps://indico.cern.ch/event/721602/contributions/3403620/
LOCATION:Naviti Beach Club Varadero Hotel
URL:https://indico.cern.ch/event/721602/contributions/3403620/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Susceptibilities of strongly interacting matter in a finite volume
DTSTART;VALUE=DATE-TIME:20190507T134000Z
DTEND;VALUE=DATE-TIME:20190507T140000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403636@indico.cern.ch
DESCRIPTION:Speakers: Christian Spieles (Frankfurt Institute for Advanced
Studies (FIAS))\nWe investigate possible finite-volume effects on baryon n
umber susceptibilities of strongly interacting matter. Assuming that a had
ronic and a deconfined phase both contribute to the thermodynamic state of
a finite system due to fluctuations\, it is found that the resulting shap
es of the net-baryon number distributions deviate significantly from
the infinite volume limit for a given temperature T and baryochemic
al potential μ_B. In particular\, the constraint on color-singletness fo
r the finite quark-gluon phase contribution leads to a change of the tempe
rature dependence of the susceptibilities in finite volumes. According to
the model\, the finite-volume effect depends qualitatively on\nthe value
of μ_B.\n\nhttps://indico.cern.ch/event/721602/contributions/3403636/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403636/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Delta mass shift as a thermometer of kinetic decoupling in Au+Au r
eactions at 1.23 AGeV
DTSTART;VALUE=DATE-TIME:20190507T142000Z
DTEND;VALUE=DATE-TIME:20190507T144000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403637@indico.cern.ch
DESCRIPTION:Speakers: Tom Reichert (Institut für Theoretische Physik\, Go
ethe Universität Frankfurt)\nThe HADES experiment at GSI will soon provid
e data on the production and properties of ∆ baryons from Au+Au reaction
s at 1.23 AGeV. Using the UrQMD model\, we predict the yield and spectra o
f ∆ resonances. In addition we show that one expects to observe a mass s
hift of the ∆ resonance on the order of 40 MeV in the reconstructable
∆ mass distribution. This mass shift can be understood in terms of late
stage ∆ formation with limited kinetic energy. We show how the mass shif
t can be used to constrain the kinetic decoupling temperature of the syste
m.\n\nhttps://indico.cern.ch/event/721602/contributions/3403637/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403637/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Gravitational wave emitted from core-collapse supernovae
DTSTART;VALUE=DATE-TIME:20190508T140000Z
DTEND;VALUE=DATE-TIME:20190508T142000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403639@indico.cern.ch
DESCRIPTION:Speakers: Tomoya Takiwaki (Tomoya)\nGravitational wave signal
from core-collapse supernova is the key to understand the mechanism of cor
e-collapse supernovae. The evolution of the frequency of the signal tells
us the property of neutron star and information of the accretion flow near
the neutron star. In this study\, I will introduce the gravitational wave
form based on our recent 3D simulations and discuss what information extra
cted from the signal.\n\nhttps://indico.cern.ch/event/721602/contributions
/3403639/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403639/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Correlation functions of sourced gravitational waves in inflationa
ry scalar vector models. A symmetry based approach
DTSTART;VALUE=DATE-TIME:20190507T193000Z
DTEND;VALUE=DATE-TIME:20190507T195000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403643@indico.cern.ch
DESCRIPTION:Speakers: Josue Motoa Manzano (Universidad del Valle)\nIn this
work we use the correspondence between a field theory in de Sitter space
in 4-dimensions and the dual conformal field theory in an euclidean space
in 3-dimensions\, to compute the form of two and three point correlation f
unctions of scalar-tensor perturbations. To this end\, we use an inflation
ary model\, in which the inflaton field is interacting with a vector field
trough the term $f(\\phi)\\left(F_{\\mu \\nu}F^{\\mu \\nu}+\\kappa\\tilde
{F}_{\\mu \\nu}F^{\\mu \\nu}\\right).$\nThe first step of this method cons
ist in to solve the equations of motion for the fields in the de Sitter 4D
space-time\, then evaluate this solutions in super-Hubble scales and com
pute the conformal weight of the projection of this fields in the 3D space
. In a second stage\, we propose a general form for the correlators\, whic
h involve scalar\, vector and tensor perturbations and\, using the first s
tep result\, find its momentum dependence by imposing that those are invar
iant under dilatations and special conformal transformation (SCT). As a re
sult\, we find the form for the different Spectrums of the tensor perturba
tions and for the a mixed Bispectrum coming from the vacuum and for the ve
ctor perturbations. They show to be in agreement with the results in the l
iterature.\n\nhttps://indico.cern.ch/event/721602/contributions/3403643/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403643/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Magnetic field-dependence of the neutral pion mass in the linear s
igma model coupled to quarks: The weak field case
DTSTART;VALUE=DATE-TIME:20190506T185000Z
DTEND;VALUE=DATE-TIME:20190506T191000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403683@indico.cern.ch
DESCRIPTION:Speakers: Daryel Manreza Paret (Facultad de Física\, Universi
dad de La Habana)\nWe compute the neutral pion mass dependence on a magnet
ic field in the weak field approximation at one-loop order. The calculatio
n is carried out within the linear sigma model coupled to quarks and using
Schwinger's proper-time representation for the charged particle propagato
rs. We find that the neutral pion mass decreases with the field strength p
rovided the boson self-coupling magnetic field corrections are also includ
ed. The calculation should be regarded as the setting of the trend for the
neutral pion mass as the magnetic field is turned on.\n\nhttps://indico.c
ern.ch/event/721602/contributions/3403683/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403683/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Black holes fueling and coalescence in galaxy mergers
DTSTART;VALUE=DATE-TIME:20190506T142000Z
DTEND;VALUE=DATE-TIME:20190506T144000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403658@indico.cern.ch
DESCRIPTION:Speakers: Andrés Escala (Universidad de Chile)\nUsing a combi
nation of Smooth Particle hydrodynamics and Adaptive Mesh Refinement simul
ations of galaxy mergers\, with sub-parsecs scale resolution\, we have stu
dy both the mass transport process onto the massive black holes throughou
t a galactic merger and especially\, the posible black holes coalescence a
t galactic center. The final coalescence of these black holes lead to grav
itational radiation emission that would be detectable up to high redshift
by future gravitational wave experiment such as eLISA\, which is expected
to be launched in 2034.\n\nhttps://indico.cern.ch/event/721602/contributio
ns/3403658/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403658/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Modeling anisotropic magnetized strange quark stars
DTSTART;VALUE=DATE-TIME:20190510T154000Z
DTEND;VALUE=DATE-TIME:20190510T160000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403661@indico.cern.ch
DESCRIPTION:Speakers: Samantha López (ICIMAF)\nWhen studying the structur
e of magnetized compact objects\, the anisotropy in their equations of sta
te (EoS)\, due to the magnetic field\, must be taken into account. This an
isotropy consists in the splitting of the pressure in two components\, one
parallel and the other perpendicular to the magnetic field. In this work
\, we compare the size and shape of magnetized strange quark stars using t
hree different sets of structure equations. First\, we solve the standard
isotropic Tolman-Oppenheimer-Volkoff equations for the parallel and perpen
dicular pressures independently. Then\, we obtain the mass-radii curves of
the magnetized strange quark stars using axially symmetric metrics in cyl
indrical and spherical coordinates\, this last one called the gamma-metric
. The differences between the results obtained in each case are discussed.
\n\nhttps://indico.cern.ch/event/721602/contributions/3403661/
LOCATION:Naviti Beach Club Varadero Hotel
URL:https://indico.cern.ch/event/721602/contributions/3403661/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Exact magnetic contribution to a one-loop charged scalar field pot
ential
DTSTART;VALUE=DATE-TIME:20190506T140000Z
DTEND;VALUE=DATE-TIME:20190506T142000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403667@indico.cern.ch
DESCRIPTION:Speakers: Gabriella Piccinelli Bocchi (Centro Tecnológico\, F
ES Aragón\, UNAM)\nIn the context of a warm inflation scenario\, we explo
re the effect of a primordial magnetic field on a charged scalar field pot
ential.\n\nhttps://indico.cern.ch/event/721602/contributions/3403667/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403667/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Charges and torsion
DTSTART;VALUE=DATE-TIME:20190506T201000Z
DTEND;VALUE=DATE-TIME:20190506T203000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403685@indico.cern.ch
DESCRIPTION:Speakers: Ernesto Frodden ()\nWe review the surface charge met
hod in the Einstein-Cartan formalism and study in particular the role of t
orsion in the computation of charges. An example in 2+1 gravity is worked
out explicitly and some advances in the Einstein-Cartan-Dirac theory are p
resented.\n\nhttps://indico.cern.ch/event/721602/contributions/3403685/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403685/
END:VEVENT
BEGIN:VEVENT
SUMMARY:CPT violation due to quantum decoherence tested at DUNE
DTSTART;VALUE=DATE-TIME:20190510T134000Z
DTEND;VALUE=DATE-TIME:20190510T140000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403665@indico.cern.ch
DESCRIPTION:Speakers: Félix Napoleón Díaz Desposorio (Pontificia Univer
sidad Católica del Perú)\nIn this work we study the intrinsic CPT violat
ion in the neutrino oscillations phenomena produced by quantum decoheren
ce as sub-leading effect. In the usual representation\, we find that onl
y fifteen elements of the decoherence matrix violate the CPT symmetry int
rinsically. We find exact solutions for the CPT asymmetry function in vacu
um . We define an observable $\\mathcal{R}$ to make predictions of this mo
del for the future Long-Baseline experiment\, DUNE. We found values of th
e decoherence parameters with $5 \\sigma$ of discrepancy to standard physi
cs which are allowed by the current experimental limits\, suggesting hint
s for new physics by this model in the context of future experiments.\n\na
rXiv:1811.04982\n\nhttps://indico.cern.ch/event/721602/contributions/34036
65/
LOCATION:Naviti Beach Club Varadero Hotel
URL:https://indico.cern.ch/event/721602/contributions/3403665/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Modeling anisotropic magnetized compact stars with $\\gamma$ metri
c: the white dwarfs picture
DTSTART;VALUE=DATE-TIME:20190510T142000Z
DTEND;VALUE=DATE-TIME:20190510T144000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403695@indico.cern.ch
DESCRIPTION:Speakers: Diana Alvear Terrero (ICIMAF)\nMagnetic fields intro
duce an anisotropy in compact stars’ equations of state by splitting the
pressure into two components\, one parallel and the other perpendicular t
o the magnetic field. This suggests the necessity of using structure equat
ions accounting for the axial symmetry of the magnetized system. We consid
er an axially symmetric metric in spherical coordinates\, the $\\gamma$-me
tric\, and construct a system of equations to describe the structure of sp
heroidal compact objects. In this way\, we connect the geometrical paramet
er $\\gamma$ linked to the spheroid’s radii\, with the source of the ani
sotropy. So\, the model relates the shape of the compact object to the phy
sics that determines the properties of the composing matter.\nTo illustrat
e how our structure equations work\, we present magnetized white dwarfs st
ructure and discuss the stability of the solutions. The results are obtain
ed for magnetic field values of $10^{12}$G\, $10^{13}$G and $10^{14}$G\, i
n all cases with and without the Maxwell contribution to the pressures and
energy density. This choice allows to have two sets of EoS\, one featurin
g $\\gamma>1$ and other with $\\gamma\n\nhttps://indico.cern.ch/event/7216
02/contributions/3403695/
LOCATION:Naviti Beach Club Varadero Hotel
URL:https://indico.cern.ch/event/721602/contributions/3403695/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Z production in pPb and PbPb collisions at 5.2 TeV
DTSTART;VALUE=DATE-TIME:20190511T142000Z
DTEND;VALUE=DATE-TIME:20190511T144000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403669@indico.cern.ch
DESCRIPTION:Speakers: Dario Ramirez Zaldivar (InSTEC\, Havana University)\
nThere is a growing interest in the exam and analysis of results in the AL
ICE\, ATLAS and CMS detectors in asymmetric systems (pPb) due to the possi
bilities of establishing some references for PbPb collisions and to gain i
nsight into the behavior of the medium itself. The analysis of data in bot
h cases can allow the understanding of the PDFs under different regimes. T
he study of the initial state in proton-lead collision at 5.02 TeV using D
rell-Yan process was chosen because the inclusive lepton production is a c
lean process independent of the color degree freedoms. For the study\, it
was considered an extension of the Glauber model to express the cross-sect
ion. Under this approach\, we can examine the initial vertex of the hard p
rocess described by sigma_pp and apply the usual calculation through the f
actorization theorem. In particular\, we focused on the analysis of the pT
distribution and compared the role of different factorization schema in t
he behavior of the distribution at low pT.\n\nhttps://indico.cern.ch/event
/721602/contributions/3403669/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403669/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Exact configurations for interacting spin-2 fields in three dimens
ions
DTSTART;VALUE=DATE-TIME:20190506T191000Z
DTEND;VALUE=DATE-TIME:20190506T193000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403671@indico.cern.ch
DESCRIPTION:Speakers: Elizabeth Rodríguez Querts (ICIMAF)\nWe studied som
e exact configurations for the three-dimensional massive multi-gravity the
ory called "Viel-dreibein gravity". We find AdS wave solutions (which refl
ect the main dynamic properties of the model) and analyze their asymptotic
behavior. In addition\, we explore the existence of black holes in the co
ntext of this theory.\n\nhttps://indico.cern.ch/event/721602/contributions
/3403671/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403671/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The magnetized photon time delay and Faraday rotation
DTSTART;VALUE=DATE-TIME:20190510T180000Z
DTEND;VALUE=DATE-TIME:20190510T182000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403673@indico.cern.ch
DESCRIPTION:Speakers: Adrian William Romero Jorge ()\nWe study the propaga
tion of photon in magnetized vacuum and medium\, taking into account rad
iative corrections. We describe both time delay and Faraday rotation\, wi
th the aim of applying the results to astrophysical context.\n\nhttps://i
ndico.cern.ch/event/721602/contributions/3403673/
LOCATION:Naviti Beach Club Varadero Hotel
URL:https://indico.cern.ch/event/721602/contributions/3403673/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Towards the measurement of the anisotropic pressures effects in ma
gnetized quantum vacuum
DTSTART;VALUE=DATE-TIME:20190511T150000Z
DTEND;VALUE=DATE-TIME:20190511T152000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403672@indico.cern.ch
DESCRIPTION:Speakers: Hugo Celso Peréz Rojas (ICIMAF)\nStarting from the
fact that vacuum pressure orthogonal to a constant magnetic field is negat
ive\, whereas along the field is positive\, we estimate the shift of frequ
ency for radiation moving in these directions to first order in α at smal
l fields as compared to the Schwinger critical field Bc\, and suggest idea
s for its experimental test. For fields of order of or greater than 2Bc we
briefly discuss the arising of an imaginary part on the vacuum energy\, m
eaning its instability at such fields. We propose an heuristic model of bo
sonic electron-positron bound state leading to a ferromagnetic quantum pha
se transition of vacuum at critical fields 2Bc.\n\nhttps://indico.cern.ch/
event/721602/contributions/3403672/
LOCATION:Naviti Beach Club Varadero Hotel
URL:https://indico.cern.ch/event/721602/contributions/3403672/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Can the symmetry breaking in the SM be determined by the “second
minimum” of the Higgs potential?
DTSTART;VALUE=DATE-TIME:20190506T183000Z
DTEND;VALUE=DATE-TIME:20190506T185000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403688@indico.cern.ch
DESCRIPTION:Speakers: Alejandro Cabo (Department of Theoretical Physics
)\nThe possibility that the spontaneous symmetry breaking in the Standard
Model (SM) may be generated by the Top-Higgs Yukawa interaction (which det
ermines the so called “second minimum” in the SM) is investigated. A f
ormer analysis about a QCD action only including the Yukawa interaction of
a single quark with a scalar field is here extended. We repeat the calcul
ation done in that study of the two loop effective action for the scalar f
ield of the mentioned model. A correction of the former evaluation allowed
to select a strong coupling \\alpha(m\,LQCD) = 0.2254 GeV at an intermedi
ate scale \\mu = 11.63 GeV\, in order to fix the minimum of the potential
at a scalar mean field determining 175 GeV for the quark mass. Next\, a s
calar field mass m = 44 GeV is evaluated\, which is also of the order of t
he experimental Higgs mass. The work is also considering the effects of em
ploying a running with momenta strong coupling. For this purpose\, the fin
ite part of the two loop potential contribution determined by the strong c
oupling\, was represented as a momentum integral. Next\, substituting in t
his integral the experimental values of the running coupling\, the minimum
of the potential curve as a function of the mean field was again fixed to
the top quark mass by reducing the scale to the value \\mu = 4.95 GeV. Th
e consideration of the running coupling also deepened the potential value
at the minimum and slightly increased the mass of the scalar field up to 5
3.58 GeV. These results rested in assuming that the low momentum dependenc
e of the coupling is “saturated” to a constant value being close to it
s experimental value at the lowest momentum measured.\n\nhttps://indico.ce
rn.ch/event/721602/contributions/3403688/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403688/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The symmetry energy in neutron stars: constraints from GW170817 an
d direct Urca cooling
DTSTART;VALUE=DATE-TIME:20190507T195000Z
DTEND;VALUE=DATE-TIME:20190507T201000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403690@indico.cern.ch
DESCRIPTION:Speakers: David Edwin Alvarez Castillo (JINR)\nIn this contrib
ution I will review the state of the art measurements for the symmetry ene
rgy from both astrophysical and terrestrial laboratories. In particular th
e recent detection of gravitational radiation from the GW170817 event shed
light on the properties of the neutron star equation of state\, thus comp
rising both the study of the symmetry energy and stellar radius. Furthermo
re\, I shall address the question on the possibility of a universal symmet
ry energy contribution to the neutron star equation of state under restric
ted Direct Urca cooling. When these two aspects are combined\, powerful pr
edictions for the neutron star equation of state are obtained.\n\nhttps://
indico.cern.ch/event/721602/contributions/3403690/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403690/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Effective potential of a higher derivative scalar field theory at
finite temperature
DTSTART;VALUE=DATE-TIME:20190506T195000Z
DTEND;VALUE=DATE-TIME:20190506T201000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403698@indico.cern.ch
DESCRIPTION:Speakers: Angel Sánchez (Facultad de Ciencias\, UNAM)\nIn thi
s contribution\, I present the study of the effect of higher derivative te
rms in the effective potential of a scalar field theory. Preliminary resul
ts indicate that quantum correction coming from the higher derivative term
s make the curvature of the effective potential\, near the origin\, become
s flatter. I will discuss how this result could be interesting within a wa
rm inflation scenario.\n\nhttps://indico.cern.ch/event/721602/contribution
s/3403698/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403698/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Crustal torsional oscillations inside the deeper pasta structures
DTSTART;VALUE=DATE-TIME:20190508T134000Z
DTEND;VALUE=DATE-TIME:20190508T140000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403708@indico.cern.ch
DESCRIPTION:Speakers: Hajime Sotani (National Astronomical Observatory of
Japan)\nThe quasi periodic oscillations (QPOs) observed in the soft-gamma
repeaters are generally considered as a results of the global oscillations
of the neutron stars. In this study\, we first take into account the tors
ional oscillations excited in the tube and bubble phases\, which can be ex
cited independently of the oscillations in the phases of spherical and cyl
indrical nuclei\, and successfully identify the observed QPO frequencies w
ith such torsional oscillations. The resultant neutron star models are con
sistent with the mass formula for low-mass neutron stars and the constrain
t by the gravitational waves from the merger of the neutron star binary\,
GW170817.\n\nhttps://indico.cern.ch/event/721602/contributions/3403708/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403708/
END:VEVENT
BEGIN:VEVENT
SUMMARY:A hybrid model for pulsar evolution
DTSTART;VALUE=DATE-TIME:20190508T130000Z
DTEND;VALUE=DATE-TIME:20190508T132000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403619@indico.cern.ch
DESCRIPTION:Speakers: Zhi Fu Gao (Xinjiang Astronomical Observatory\, Chin
ese Academy of Sciences)\nThe combined effects of both the standard magnet
ic dipole model and the composite neutron superfluid vortex model on the e
nergy loss rate of neutron stars and pulsar spin down are simultaneously t
aken into account to study the evolution of neutron stars on the P-Pdot di
agram. The evolution path of each neutron star is dictated by a particular
mechanism in our hybrid model in different parameter spaces and the valle
y of each curve is the most possible place for a neutron star to be observ
ed since this is the place which corresponds to the minimum value of the e
volution speed (i.e. the time derivative Pdot). In other words\, pulsars w
ould distribute around these valleys on the P-Pdot diagram. The combined m
odel can be fitted very well with observation to yield the interesting res
ults:(1) the suppressed region in the lower-right part of the diagram ca
n be explained by neutrino cyclotron emission from the 1S0 neutron superfl
uid vortexes in neutron stars. (2) All radio pulsars that were identified
with super strong magnetic fields with field strength beyond the critical
quantum magnetic field before are now all lying inside the critical magnet
ic field line in our model. (3) The peak of neutron star magnetic fields (
logB) distribution revels a gaussian distribution in our model whereas the
statistics of the simple magnetic dipole model results in a distribution
with non-symmetrical peak.\n\nhttps://indico.cern.ch/event/721602/contribu
tions/3403619/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403619/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Education and Cultural Astronomy
DTSTART;VALUE=DATE-TIME:20190506T132000Z
DTEND;VALUE=DATE-TIME:20190506T140000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403865@indico.cern.ch
DESCRIPTION:Speakers: Steven Gullberg (University of Oklahoma)\nThe import
ance of including a thorough search for the potential use of astronomy in
the examination of any culture is discussed. Educational strategies are in
cluded that can enable scholars to add related research knowledge that wil
l enable them to augment their studies in this pursuit.\n\nWhat can be lea
rned from astronomy in culture is examined and the importance of including
such research as a part of certain studies is emphasized. A primary goal
is to help scholars to learn more about the research of astronomy in cultu
re with the goal of increasing the numbers of those engaged with this in s
trong research and publication. Educational strategies and emerging progra
ms will be discussed. Such educational initiatives will greatly strengthen
this research in the future and will facilitate significant advancements
in what we know about the astronomy of ancient and indigenous cultures wor
ld-wide.\n\nhttps://indico.cern.ch/event/721602/contributions/3403865/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403865/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Observation of r-process abundance patterns in stars
DTSTART;VALUE=DATE-TIME:20190506T160000Z
DTEND;VALUE=DATE-TIME:20190506T163000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403638@indico.cern.ch
DESCRIPTION:Speakers: Norbert Christlieb (Universität Heidelberg)\nStars
conserve in their atmospheres\, to a large extent\, the chemical compositi
on of the gas cloud from which they formed. The chemical compositions of o
ld\, metal-poor stars in the halo of our galaxy can hence be used for reco
nstructing the chemical enrichment history of the Milky Way\, and studying
the nucleosynthesis processes that contributed to the enrichment. For exa
mple\, a unique abundance signature of the rapid neutron-capture process (
r-process) has been observed in metal-poor stars strongly enriched in r-pr
ocess elements\, providing constraints on r-process models and the physica
l conditions of the site of this process.\n\nIn my talk I will review the
recent progress that has been made in identifying large samples of metal-p
oor stars by means of wide-angle sky surveys\, determinations of their che
mical compositions with optical high-resolution spectra and state-of-the a
rt stellar model atmospheres\, and future prospects in the era of 4-10m te
lescopes equipped with highly multiplexed spectrographs\, as well as the n
ext generation of large ground-based telescopes currently under constructi
on.\n\nhttps://indico.cern.ch/event/721602/contributions/3403638/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403638/
END:VEVENT
BEGIN:VEVENT
SUMMARY:A breakthrough for the study of resolved stellar populations with
ELTMOS/MOSAIC
DTSTART;VALUE=DATE-TIME:20190506T153000Z
DTEND;VALUE=DATE-TIME:20190506T160000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403618@indico.cern.ch
DESCRIPTION:Speakers: Roth Martin (Leibniz-Institut für Astrophysik Potsd
am (AIP))\nThe study of resolved stellar populations in nearby galaxies ou
tside of the Local Group has come within reach with the new generation of
extremely large telescopes\, featuring primary mirror diameters on the ord
er of 30 meters. ELT\, the European Extremely Large Telescope\, is current
ly being built at the Armazones site in the Atacama desert of Chile. From
the instrumentation suite for the ELT\, the multi-object spectrograph ELT-
MOS stands out with the capability of combining the large light collecting
power with adaptive optics over the entire field-of-view of the ELT\, thu
s becoming the perfect instrument to study the spectra of resolved stars i
n galaxies beyond the Milky Way and the Local Group. With an emphasis of t
he stellar science case\, the instrument at the stage of the completed Pha
se-A study will be presented and discussed\, in particular with a focus on
the synergy potential with the MICADO imager at the ELT\, and the MUSE IF
U at the VLT.\n\nhttps://indico.cern.ch/event/721602/contributions/3403618
/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403618/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The phase diagram of the Polyakov-Nambu-Jona-Lasinio approach
DTSTART;VALUE=DATE-TIME:20190507T150000Z
DTEND;VALUE=DATE-TIME:20190507T153000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3408282@indico.cern.ch
DESCRIPTION:Speakers: Joerg Aichelin (Subatech/CNRS\, France)\nRecently we
succeeded\, by introducing an interaction between the gluon mean field (p
resented by the a function of the Polyakov loop) and quarks\, to reproduce
the lattice equation of state for zero chemical potential with the Polyak
ov-Nambu-Jona-Lasinio model. Also\, entropy density\, interaction measure\
, energy density and the speed of sound are quite nicely reproduced. Even
the first coefficient of the Taylor expansion of the lattice data with res
pect to the chemical potential is in the error bars of the lattice calcula
tions. These findings are of great importance for future studies of heavy
ion reactions because the Polyakov-Nambu-Jona-Lasinio model can be extende
d to finite chemical potentials (where lattice calculations are not possib
le) without introducing any new parameter. In addition\, it shows at large
chemical potentials a first order phase transition. It provides therefore
a basis for theoretical studies in the energy range of the future FAIR an
d NICA facilities where one expects that heavy ion collisions are characte
rized by a large chemical potential. It may also serve as a equation of st
ate for gravitational wave studies.\n\nhttps://indico.cern.ch/event/721602
/contributions/3408282/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3408282/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Exploring the partonic phase at finite chemical potential within a
n extended off-shell transport approach
DTSTART;VALUE=DATE-TIME:20190507T153000Z
DTEND;VALUE=DATE-TIME:20190507T160000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403668@indico.cern.ch
DESCRIPTION:Speakers: Elena Bratkovskaya (GSI\, Helmholtzzentrum für Schw
erionenforschung GmbH\, Darmstadt\, Germany and Institute for Theoretical
Physics\, Johann Wolfgang Goethe-Universität\, Frankfurt am Main\, German
y)\nWe extend the Parton-Hadron-String Dynamics (PHSD) transport approach
in the partonic sector by explicitly calculating the total and differentia
l partonic scattering cross sections as a function of temperature $T$ and
baryon chemical potential $\\mu_B$ on the basis of the effective propagato
rs and couplings from the Dynamical QuasiParticle Model (DQPM) that is mat
ched to reproduce the equation of state of the partonic system above the d
econfinement temperature $T_c$ from lattice QCD. \n\nThe novel transport a
pproach (PHSD5.0) thus incorporates no additional parameters compared to t
he default version PHSD4.0. We calculate the collisional widths for the pa
rtonic degrees of freedom at finite $T$ and $\\mu_B$ in the time-like sect
or and conclude that the quasiparticle limit holds sufficiently well. Furt
hermore\, the ratio of shear viscosity $\\eta$ over entropy density $s$\,
i.e. $\\eta/s$\, is evaluated using the collisional widths and compared to
lQCD calculations for $\\mu_B$ = 0 as well. We find that the novel ratio
$\\eta/s$ does not differ very much from that calculated within the origin
al DQPM on the basis of the Kubo formalism. Furthermore\, there is only a
very modest change of $\\eta/s$ with the baryon chemical $\\mu_B$ as a fun
ction of the scaled temperature $T/T_c(\\mu_B)$. This also holds for a var
iety of hadronic observables from central A+A collisions in the energy ran
ge 5 GeV $\\leq\\sqrt{s_{NN}} \\leq$ 200 GeV when implementing the differe
ntial cross sections into the PHSD approach. We only observe small differe
nces in the antibaryon sector (${\\bar p}\, {\\bar \\Lambda}+{\\bar \\Sigm
a}^0$) at $\\sqrt{s_{NN}}$ = 17.3 GeV and 200 GeV with practically no sens
itivity of rapidity and $p_T$ distributions to the $\\mu_B$ dependence of
the partonic cross sections. Small variations in the strangeness sector ar
e obtained in all studied collisional systems (A+A and C+Au)\, however\, i
t will be very hard to extract a robust signal experimentally. Since we fi
nd only small traces of a $\\mu_B$-dependence in heavy-ion observables - a
lthough the effective partonic masses and widths as well as their partonic
cross sections clearly depend on $\\mu_B$ - this implies that one needs a
sizable partonic density and large space-time QGP volume to explore the d
ynamics in the partonic phase. These conditions are only fulfilled at high
bombarding energies where $\\mu_B$ is\, however\, rather low. On the othe
r hand\, when decreasing the bombarding energy and thus increasing $\\mu_B
$\, the hadronic phase becomes dominant and accordingly\, it will be diffi
cult to extract signals from the partonic dynamics based on "bulk" observa
bles.\n\nhttps://indico.cern.ch/event/721602/contributions/3403668/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3403668/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Cosmogenic photon and neutrino fluxes in the Auger era
DTSTART;VALUE=DATE-TIME:20190506T193000Z
DTEND;VALUE=DATE-TIME:20190506T195000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403599@indico.cern.ch
DESCRIPTION:Speakers: Rogerio de Almeida (Universidade Federal Fluminense)
\nThe interaction of ultra-high-energy cosmic rays (UHECRs) with pervasive
photon fields generates associated cosmogenic fluxes of neutrinos and pho
tons due to photohadronic and photonuclear processes taking place in the i
ntergalactic medium. We perform a fit of the UHECR spectrum and compositio
n measured by the Pierre Auger Observatory for four source emissivity scen
arios: power-law redshift dependence with one free parameter\, active gala
ctic nuclei\, gamma-ray bursts\, and star formation history. We show that
negative source emissivity evolution is favoured if we treat the source ev
olution as a free parameter. In all cases\, the best fit is obtained for r
elatively hard spectral indices and low maximal rigidities\, for compositi
ons at injection dominated by intermediate nuclei (nitrogen and silicon gr
oups). In light of these results\, we calculate the associated fluxes of n
eutrinos and photons. Finally\, we discuss the prospects for the future ge
neration of high-energy neutrino and gamma-ray observatories to constrain
the sources of UHECRs.\n\nhttps://indico.cern.ch/event/721602/contribution
s/3403599/
LOCATION:Naviti Beach Club Varadero Hotel
URL:https://indico.cern.ch/event/721602/contributions/3403599/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Magnetic field effects on Bose-Einstein condensate stars
DTSTART;VALUE=DATE-TIME:20190510T150000Z
DTEND;VALUE=DATE-TIME:20190510T152000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403646@indico.cern.ch
DESCRIPTION:Speakers: Gretel Quintero Angulo (Facultad de Física\, Univer
sidad de La Habana)\nWe study magnetic field effects on the Equations of S
tate (EoS) and the structure (mass-radius relation) of Bose-Einstein Conde
nsate (BEC) stars\, i.e. a compact object composed by a gas of interacting
spin one bosons formed up by the pairing of two neutrons. To include magn
etic field in the star description we suppose that particle-field and part
icle-particle interactions are independent\, and consider two situations\,
one where the magnetic field is constant\, and another where it is produc
ed by the bosons. Magnetic field presence splits the pressure of the boson
gas in two components\, one parallel and the other perpendicular to field
direction. At low densities and/or strong fields the smaller pressure mig
ht be negative\, making the boson system unstable. This imposes a lower li
mit to the central mass density of the star in a way that\, the stronger i
s the magnetic field\, the denser has to be star to support its mass again
st collapse. Since the anisotropy in the pressures implies that the result
ing star is not spherical\, to compute the mass-radius relation we use the
recently found γ-structure equations that describe axially symmetric obj
ects provided they are spheroidal. The obtained BEC stars are\, in general
\, less massive and smaller than in the non-magnetic case\, being magnetic
field effects more relevant for low densities. When the magnetic field is
produced by the bosons\, the inner profiles of the fields are determined
self consistently as a function of the star inner radii\, its values being
in the orders expected for compact stars.\n\nhttps://indico.cern.ch/event
/721602/contributions/3403646/
LOCATION:Naviti Beach Club Varadero Hotel
URL:https://indico.cern.ch/event/721602/contributions/3403646/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Homogeneity of the universe emerging from the Equivalence Principl
e and Poisson equation: A comparison between Newtonian and MONDian cosmolo
gy
DTSTART;VALUE=DATE-TIME:20190511T132000Z
DTEND;VALUE=DATE-TIME:20190511T134000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403595@indico.cern.ch
DESCRIPTION:Speakers: Eduardo Guendelman (Ben Gurion University)\nA corres
pondence between the Equivalence principle and the homogeneity of the univ
erse is discussed. We show that under the Newtonian gravity\, translation
of co-moving coordinates in a uniformly expanding universe defines a new a
ccelerated frame. A consistency condition for the invariance of this trans
formation yields the second Friedman equation. All these symmetries are lo
st when we modify Newton’s second law and/ or the Poisson equation. For
example by replacing Newton’s second law with non-linear function of the
acceleration\, as Modified Newtonian Dynamics (MOND) suggested\, the conc
ept of relative acceleration is lost. As a consequence the homogeneity of
the universe breaks. Therefore MOND which changes Newton’s second law or
a QUAdratic Lagrangian (AQUAL) which changes the Poisson equation are not
complete theories and they should be amended to preserve the cosmological
principle. Only locally could MOND be used as a toy model\, but not as a
global theory which should describe a universe in large scales.\n\nhttps:/
/indico.cern.ch/event/721602/contributions/3403595/
LOCATION:Naviti Beach Club Varadero Hotel
URL:https://indico.cern.ch/event/721602/contributions/3403595/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The mathematical description of the influence of the expansion of
the Universe on the metric of a black hole
DTSTART;VALUE=DATE-TIME:20190510T182000Z
DTEND;VALUE=DATE-TIME:20190510T184000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403662@indico.cern.ch
DESCRIPTION:Speakers: Adrian Linares-Rodríguez (Universidad Central "Mart
a Abreu" de Las Villas\, Santa Clara ci)\nThe existence of black holes has
its analytical argumentation in Einstein's field equations. The first sol
ution of general relativity that would characterize a black hole was found
by Schwarzschild in 1916. Since then\, these cosmic objects are being stu
died and investigated in their various variants: Scwartzshild\, Kerr\, Rei
ssner-Nordström\, Kerr-Newman\, and others. The no-hair theorem states th
at a black hole has only three independent properties: mass\, charge and a
ngular momentum and is characterized by producing intense gravitational fi
elds. On the other hand\, the existence in the Universe of a dark material
component of the repulsive type against the attractive action of gravitat
ion can be represented by the quintessence. The effect of the quintessence
surrounding the black hole is then introduced. Ordinarily\, an additional
element within the stress-energy-moment tensor of the Einstein field equa
tions is introduced. The mathematical description of this problem is compl
icated\, in general. In this investigation\, we have chosen to use a varia
nt in which the effect of the quintessence is introduced as a perturbative
action in the metric of the ordinary black hole introducing the time-depe
ndent scale factor. The Einstein field equations are obtained using the pe
rturbed metric and the results obtained correspond to those obtained by th
e ordinary way.\n\nhttps://indico.cern.ch/event/721602/contributions/34036
62/
LOCATION:Naviti Beach Club Varadero Hotel
URL:https://indico.cern.ch/event/721602/contributions/3403662/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Extending observations to distances larger than 10 kpc should reso
lve the anomaly of a galaxy lacking dark matter
DTSTART;VALUE=DATE-TIME:20190510T184000Z
DTEND;VALUE=DATE-TIME:20190510T190000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403589@indico.cern.ch
DESCRIPTION:Speakers: Ramzi Suleiman (Triangle Research & Development Cent
er)\nWe investigated the claim that galaxy NGC 1052-DF2 lacks dark matter.
For this purpose\, we constructed a novel\, theory-based computer simulat
ion of the dynamical interaction of matter and dark matter in a prototypic
al ellipsoid galaxy and utilized it to predict the distributions of dark m
atter in a galaxy as a function of the galaxy’s core radius and maximal
rotation velocity. We ran the simulation using the parameters of NGC 1052-
DF2 as well as the parameters of six other UDGs from the Coma cluster and
seven dSph galaxies from the local group. For each galaxy\, the simulation
was run in steps of 2 kpc up to 100 kpc from the galaxy center. Inspectio
n of the distributions of matter and dark matter generated by the simulate
d\, as a function from distance r\, reveals the following: (1) Consistent
with the ΛCDM paradigm\, all the tested galaxies\, including galaxy NGC 1
051-DF2\, are predicted to be dark-matter-dominated. (2) The reported lack
of dark matter within r ≤ 10 kpc is supported by the simulation results
. However\, this result is an aftermath of conducting a “shortsighted”
observation for only r \n\nhttps://indico.cern.ch/event/721602/contributi
ons/3403589/
LOCATION:Naviti Beach Club Varadero Hotel
URL:https://indico.cern.ch/event/721602/contributions/3403589/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Non-linear electrodynamics for astrophysical plasmas
DTSTART;VALUE=DATE-TIME:20190510T140000Z
DTEND;VALUE=DATE-TIME:20190510T142000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3403601@indico.cern.ch
DESCRIPTION:Speakers: Marcelo Enrique Rubio (IATE - CONICET)\nIn this work
we study the initial value problem of a non-linear extension of classical
Electromagnetism\, known as "Force-Free Electrodynamics" (FFE). The FFE e
quations describe the dynamics of a diluted plasma near the event horizon
of a rotating black hole. In these astrophysical regions\, magnetic fields
dominate the dynamics when compared with the matter that constitutes thos
e plasmas\, giving rise to an decoupled description for Electromagnetism.\
nAs a starting point\, we consider a covariant formulation of the FFE theo
ry in terms of two scalar potentials\, known as "Euler potentials"\, which
allow a very elegant and precise geometric interpretation of it. The ease
of formulating FFE in terms of two potentials lies in the fact that\, bei
ng the only dynamical variables\, it provides an optimal scenario for its
numerical implementation. In this work we show that this formulation is we
akly hyperbolic\, which means that the system does not have a well posed i
nitial value problem in the usual sense. In this way\, it is not possible
to guarantee uniqueness or continuity during the dynamic evolution\, which
implies that this formulation is not convenient for numerical simulations
.\n\nhttps://indico.cern.ch/event/721602/contributions/3403601/
LOCATION:Naviti Beach Club Varadero Hotel
URL:https://indico.cern.ch/event/721602/contributions/3403601/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Physics and astrophysics with the Pierre Auger Observatory
DTSTART;VALUE=DATE-TIME:20190510T132000Z
DTEND;VALUE=DATE-TIME:20190510T134000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3412995@indico.cern.ch
DESCRIPTION:Speakers: Rogerio de Almeida (Universidade Federal Fluminense)
\nOne century after the discovery of cosmic rays\, the origin of ultra hig
h energy cosmic rays still remains enigmatic. Taking data since 2004\, the
Pierre Auger Collaboration has been expanding our knowledge about these c
osmic particles with energies much higher than what LHC can achieve. Altho
ugh some intriguing questions have been answered\, some of the mystery sti
ll persists. The focus of this presentation is on the most recent results
on ultra-high energy cosmic rays obtained with the Pierre Auger Observator
y with emphasis on the anisotropy studies of the arrival directions of t
he most energetic particles.\n\nhttps://indico.cern.ch/event/721602/contri
butions/3412995/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3412995/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Deuteron production in heavy ion collisions
DTSTART;VALUE=DATE-TIME:20190507T160000Z
DTEND;VALUE=DATE-TIME:20190507T163000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3413285@indico.cern.ch
DESCRIPTION:Speakers: Marcus Bleicher (Uni Frankfurt)\nIn this talk\, we d
iscuss UrQMD phase-space coalescence calculations for the production of de
uterons. We compare with available data for various reactions from the GSI
/FAIR energy regime up to LHC. It is found that the production process of
deuterons\, as reflected in their rapidity and transverse momentum distrib
utions in p+p\, p+A and A+A collisions at a beam energies starting from th
e GSI energy regime around 1 AGeV and up to the LHC\, are in good agreemen
t with experimental data. We further explore the energy and centrality dep
endence of the d/p ratios. Finally\, we discuss anti-deuteron production f
or selected systems. Overall\, a good description of the experimental data
is observed. The results are also compatible with thermal model estimates
. We also discuss the production of hypermatter within the same approach a
nd find sizable production rates at FAIR.\n\nhttps://indico.cern.ch/event/
721602/contributions/3413285/
LOCATION:Museum Casa de los Árabes
URL:https://indico.cern.ch/event/721602/contributions/3413285/
END:VEVENT
BEGIN:VEVENT
SUMMARY:A study in progres about a dynamical gravastar solution
DTSTART;VALUE=DATE-TIME:20190511T134000Z
DTEND;VALUE=DATE-TIME:20190511T140000Z
DTSTAMP;VALUE=DATE-TIME:20201027T152924Z
UID:indico-contribution-721602-3415216@indico.cern.ch
DESCRIPTION:Speakers: Duvier Fontanella (ICIMAF)\nWe present the state of
research devoted to investigate the consequences of a formerly proposed re
gular solution at the origin for the Einstein-Klein-Gordon equations. We i
mplement a match with the Schwarzschild solutions with a zero scalar field
outside a spherical region. The configuration of fields are used as a fir
st step in an iterative process to calculate the vacuum expectation value
of the energy-momentum tensor\, aiming at further solving the Einstein sem
i-classical equation. The result shows the quantum corrections to the prev
ious solution. It is expected that further steps in the iterative process
will regulate the previous solutions\, by leading to the convergence of th
e iterative solution. The first step in the iteration solution and an expl
icit dependence of the expectation value of the energy-momentum tensor wit
h the metric are found.\n\nhttps://indico.cern.ch/event/721602/contributio
ns/3415216/
LOCATION:Naviti Beach Club Varadero Hotel
URL:https://indico.cern.ch/event/721602/contributions/3415216/
END:VEVENT
END:VCALENDAR