Name: STARS2017 - 4th Caribbean Symposium on Cosmology, Gravitation, Nuclear and Astroparticle Physics / SMFNS2017 - 5th International Symposium on Strong Electromagnetic Fields and Neutron Stars
Start: 2017-05-03T08:00:00-04:00
End: 2017-05-13T20:00:00-04:00
Location: No location set

STARS2017 - 4th Caribbean Symposium on Cosmology, Gravitation, Nuclear and Astroparticle Physics / SMFNS2017 - 5th International Symposium on Strong Electromagnetic Fields and Neutron Stars

from Wednesday, 3 May 2017 (08:00) to Saturday, 13 May 2017 (20:00)

Monday, 1 May 2017
Tuesday, 2 May 2017
Wednesday, 3 May 2017

08:45 School opening
School opening
08:45 - 09:00
09:00 Black holes as tools - AdS/CFT and the holographic principle (Lecture I) - Matthias Kaminski (University of Alabama, Tuscaloosa, United States)
Black holes as tools - AdS/CFT and the holographic principle (Lecture I)
- Matthias Kaminski (University of Alabama, Tuscaloosa, United States)
09:00 - 10:20
Modeling matter at high densities, high temperatures, and at large values of the relevant coupling constant(s) is a quite challenging task. In these lectures, we are going to introduce the AdS/CFT correspondence (more generally called gauge/gravity correspondence or holography), which allows us to map challenging quantum problems at strong coupling to classical gravity problems at small curvature values of spacetime. Applications to heavy ion collisions and neutron star physics will be discussed.
10:20 Coffee break
Coffee break
10:20 - 10:40
10:40 Black holes as tools - AdS/CFT and the holographic principle (Lecture II) - Matthias Kaminski (University of Alabama, Tuscaloosa, United States)
Black holes as tools - AdS/CFT and the holographic principle (Lecture II)
- Matthias Kaminski (University of Alabama, Tuscaloosa, United States)
10:40 - 12:00
Modeling matter at high densities, high temperatures, and at large values of the relevant coupling constant(s) is a quite challenging task. In these lectures, we are going to introduce the AdS/CFT correspondence (more generally called gauge/gravity correspondence or holography), which allows us to map challenging quantum problems at strong coupling to classical gravity problems at small curvature values of spacetime. Applications to heavy ion collisions and neutron star physics will be discussed.
Thursday, 4 May 2017
09:00 Effective model for quark-hadron matter in compact stars (Lecture I) - David Blaschke (University of Wroclaw, Poland and Joint Institute for Nuclear Research (JINR), Dubna, Russia)
Effective model for quark-hadron matter in compact stars (Lecture I)
- David Blaschke (University of Wroclaw, Poland and Joint Institute for Nuclear Research (JINR), Dubna, Russia)
09:00 - 10:20
Starting from model Lagragians of the Nambu-Jona-Lasinio(NJL) type that share basic symmetries with the QCD Lagrangian we demonstrate in these lectures how to use the Path-Integral formalism in order to obtain dynamical chiral symmetry breaking and color superconductivity at the mean-field level of description and how to describe the formation and dissociation of hadronic bound states of quarks when going beyond that approximation. The status of the quest for a unified equation of state for quark-hadron matter is discussed and its importance for applications to simulations of heavy-ion collisions and the evolution of compact stars and their mergers is outlined.
10:20 Coffee break
Coffee break
10:20 - 10:40
10:40 Effective model for quark-hadron matter in compact stars (Lecture II) - David Blaschke (University of Wroclaw, Poland and Joint Institute for Nuclear Research (JINR), Dubna, Russia)
Effective model for quark-hadron matter in compact stars (Lecture II)
- David Blaschke (University of Wroclaw, Poland and Joint Institute for Nuclear Research (JINR), Dubna, Russia)
10:40 - 12:00
Starting from model Lagragians of the Nambu-Jona-Lasinio (NJL) type that share basic symmetries with the QCD Lagrangian we demonstrate in these lectures how to use the Path-Integral formalism in order to obtain dynamical chiral symmetry breaking and color superconductivity at the mean-field level of description and how to describe the formation and dissociation of hadronic bound states of quarks when going beyond that approximation. The status of the quest for a unified equation of state for quark-hadron matter is discussed and its importance for applications to simulations of heavy-ion collisions and the evolution of compact stars and their mergers is outlined.
Friday, 5 May 2017
09:00 Modeling extreme matter in heavy-ion collisions (Lecture I) - Marcus Bleicher (Frankfurt Institute for Advanced Studies (FIAS) and University of Frankfurt, Frankfurt, Germany)
Modeling extreme matter in heavy-ion collisions (Lecture I)
- Marcus Bleicher (Frankfurt Institute for Advanced Studies (FIAS) and University of Frankfurt, Frankfurt, Germany)
09:00 - 10:20
We discuss different approaches to model various stage of relativistic heavy ion reactions. We will start from straightforward hydrodynamic descriptions and will then turn to multi-fluid hydrodynamics and hybrid approaches where a Boltzmann transport equation is coupled to hydrodynamics. The main physics results are discussed with a focus on elliptic flow and di-lepton production.
10:20 Coffee break
Coffee break
10:20 - 10:40
10:40 Modeling extreme matter in heavy-ion collisions (Lecture II) - Marcus Bleicher (Frankfurt Institute for Advanced Studies (FIAS) and University of Frankfurt, Frankfurt, Germany)
Modeling extreme matter in heavy-ion collisions (Lecture II)
- Marcus Bleicher (Frankfurt Institute for Advanced Studies (FIAS) and University of Frankfurt, Frankfurt, Germany)
10:40 - 12:00
We discuss different approaches to model various stage of relativistic heavy ion reactions. We will start from straightforward hydrodynamic descriptions and will then turn to multi-fluid hydrodynamics and hybrid approaches where a Boltzmann transport equation is coupled to hydrodynamics. The main physics results are discussed with a focus on elliptic flow and di-lepton production.
12:00 School closing
School closing
12:00 - 12:20
Saturday, 6 May 2017

17:00 Registration of participants
Registration of participants
17:00 - 20:00
Sunday, 7 May 2017

08:00 Registration
Registration
08:00 - 08:45

08:45 Symposium Opening
Symposium Opening
08:45 - 09:00
09:00 The neutrino flavor puzzle - Ricardo González Felipe (Instituto Superior de Engenharia de Lisboa (ISEL), Instituto Politécnico de Lisboa and Centro de Física Teórica de Partículas (CFTP), Instituto Superior Técnico, Universidade de Lisboa, Portugal)
The neutrino flavor puzzle (STARS2017)
- Ricardo González Felipe (Instituto Superior de Engenharia de Lisboa (ISEL), Instituto Politécnico de Lisboa and Centro de Física Teórica de Partículas (CFTP), Instituto Superior Técnico, Universidade de Lisboa, Portugal)
09:00 - 09:20
A remarkable breakthrough in neutrino physics has been witnessed in recent years. Neutrino oscillation experiments have firmly established the existence of neutrino masses and leptonic mixing, which represents a solid evidence of physics beyond the Standard Model. We present a brief overview of the neutrino flavor puzzle, with emphasis on theoretical approaches to address this problem. A possible path towards the solution of this puzzle consists on requiring some of the elements in the leptonic mass matrices to vanish. Such texture zeros can be enforced by means of Abelian symmetries. We present some examples of the implementation of maximally restrictive texture zeros in the context of two-Higgs-doublet models with Majorana neutrinos. We also discuss the ultraviolet completion of these models in the framework of the seesaw mechanism for neutrino masses.
09:20 Uniformly accelerated point charge: cusp radiation - Michael Good (Nazarbayev University, Astana, Kazakhstan)
Uniformly accelerated point charge: cusp radiation (STARS2017)
- Michael Good (Nazarbayev University, Astana, Kazakhstan)
09:20 - 09:40
A curious uniformly accelerated point charge, which moves neither in a straight line nor in a circle, but in a cusp, is investigated. We find the angular distribution of the Larmor radiation, the constant power, and the intensity in the maximal direction. We also confirm that the vacuum excitation spectra of quantized field detectors on the world line is analytic and hotter than rectilinear acceleration radiation.
09:40 What can magnetar QPOs tell us about the NS EoS - Michael Gabler (Max Plank Institute for Astrophysics, Garching, Germany)
What can magnetar QPOs tell us about the NS EoS (STARS2017)
- Michael Gabler (Max Plank Institute for Astrophysics, Garching, Germany)
09:40 - 10:00
Magneto-elastic Oscillations of neutron stars are believed to be observed as quasi-periodic oscillations in the decaying tail of the giant flares of magnetars. Significant efforts in the theoretical modelling from different groups have increased our understanding of this phenomenon significantly. Here we will discuss some constraints on the matter in neutron stars that arise if the interpretation of the observations in terms of superfluid, magneto-elastic oscillations is correct.
10:00 IceCube: A wide view on astro-particles - Javier Gonzalez (Bartol Research Institute, Univ. Delaware, Newark, United States)
IceCube: A wide view on astro-particles (STARS2017)
- Javier Gonzalez (Bartol Research Institute, Univ. Delaware, Newark, United States)
10:00 - 10:30
The IceCube Neutrino Observatory, located at the geographical South Pole, has a rich scientific program covering a wide range of topics from multi-messenger astrophysics to particle physics. Evidence for the existence of an astrophysical flux of neutrinos was presented in 2013, opening a new window into the cosmos. Since then, a variety of follow-up studies have strengthened the case. Neutrino arrival directions, as well as the time correlation between neutrino detection and transient phenomena, are analyzed in an attempt to identify and constrain the possible neutrino sources. The IceCube detector also detects cosmic rays with IceTop, its surface component. The cosmic ray spectrum, composition and arrival direction distribution is determined by combining the measurements done at the surface with those made in the ice. We review these and other recent results from IceCube and their implications on our understanding of neutrinos and cosmic rays. We finish by describing the view for future developments.
10:30 Coffee Break and Poster Session
Coffee Break and Poster Session
10:30 - 11:00
11:00 The Deep Underground Neutrino Experiment - DUNE: the precision era of neutrino physics - Ernesto Kemp (University of Campinas, Brazil)
The Deep Underground Neutrino Experiment - DUNE: the precision era of neutrino physics (STARS2017)
- Ernesto Kemp (University of Campinas, Brazil)
11:00 - 11:30
The last decade was remarkable for neutrino physics. In particular, the phenomenon of neutrino flavor oscillations has been firmly established by a series of independent measurements. All parameters of the neutrino mixing are now known and we have elements to plan a judicious exploration of new scenarios that are opened by these recent advances. With precise measurements we can test the 3-neutrino paradigm, neutrino mass hierarchy and CP asymmetry in the lepton sector. The future long-baseline experiments are considered to be a fundamental tool to deepen our knowledge of electroweak interactions. The Deep Underground Neutrino Experiment – DUNE will detect a broad-band neutrino beam from Fermilab in an underground massive Liquid Argon Time-Projection Chamber at an L/E of about 10^3 km / GeV to reach good sensitivity for CP-phase measurements and the determination of the mass hierarchy. The dimensions and the depth of the Far Detector also create an excellent opportunity to look for rare signals like proton decay to study violation of baryonic number, as well as supernova neutrino bursts, broadening the scope of the experiment to astrophysics and associated impacts in cosmology. In this presentation, we will discuss the physics motivations and the main experimental features of the DUNE project required to reach its scientific goals.
11:30 Astro-particle physics with the DUNE detector - John LoSecco (University of Notre Dame du Lac, Physics Department, Indiana, United States)
Astro-particle physics with the DUNE detector (STARS2017)
- John LoSecco (University of Notre Dame du Lac, Physics Department, Indiana, United States)
11:30 - 12:00
The long baseline neutrino community is constructing a 40 kiloton liquid argon imaging detector at the Sanford underground research facility in South Dakota about 1300 km from Fermilab. The primary goal of this project is to study the evolution of the neutrino beam to determine the neutrino mass hierarchy and CP violation in the neutrino sector. Additional goals include studies of proton decay, atmospheric neutrinos, supernova and dark matter. This talk will focus on how the unique features of this detector can be used to enhance our understanding of supernova mechanisms, dark matter and other open questions in astrophysics.
12:00 News from the Pierre Auger Observatory - Lukas Nellen (Universidad Nacional Autonoma de Mexico (UNAM), Mexico)
News from the Pierre Auger Observatory (STARS2017)
- Lukas Nellen (Universidad Nacional Autonoma de Mexico (UNAM), Mexico)
12:00 - 12:30
The Pierre Auger Observatory is currently the world's largest cosmic ray observatory, designed to explore the energy range from $10^{17}\,\mathrm{eV}$ up to and beyond $10^{20}\,\mathrm{eV}$. This also provides us with access to center of mass energies for particle collisions beyond those available to current accelerators. We will present recent results from the Pierre Auger Observatory, which cover the areas of astrophysics and particle physics, covering aspects of mass composition, anisotropy, and modeling of particle interactions. We will also discuss some ways how results constrain source models and propagation of cosmic rays. Finally, we will present the upgrade program, AugerPrime, to enhance the abilities of the Observatory.
12:30 Lunch
Lunch
12:30 - 14:00
14:00 Electromagnetic emissivity of hot and dense matter - Elena Bratkovskaya (Frankfurt Institute for Advanced Studies (FIAS) and University of Frankfurt, Frankfurt, Germany)
Electromagnetic emissivity of hot and dense matter (STARS2017)
- Elena Bratkovskaya (Frankfurt Institute for Advanced Studies (FIAS) and University of Frankfurt, Frankfurt, Germany)
14:00 - 14:30
The QCD matter produced initially in ultra-relativistic nucleus-nucleus collisions is expected to represent a high temperature plasma, which should be evidenced in its electromagnetic radiation. We analyze the production of real and virtual photons from the strongly-coupled QGP in the initial stages of the collisions as well as the ('corona') radiation from the interacting mesons and baryons after hadronization using the parton-hadron-string dynamics (PHSD) transport approach. The description of the bulk evolution in the microscopic PHSD approach is independently controlled by abundances, spectra and flow of final particles, which is found to be in agreement with experimental observation. In this contribution, we will provide a brief description of the relevant physics assumptions within the PHSD approach and give details on the implementation of the photon radiation in partonic and hadronic interactions and decays. Our calculations successfully describe the production of photons and dileptons in proton-proton as well as nucleus-nucleus collisions from SIS to RHIC and LHC energies.
14:30 A new transport approach for heavy ion collisions - Joerg Aichelin (Subatech/CNRS, Nantes, France)
A new transport approach for heavy ion collisions (STARS2017)
- Joerg Aichelin (Subatech/CNRS, Nantes, France)
14:30 - 15:00
I present a new transport approach for heavy ion collisions based on a n-body transport theory and called PHQMD. In contradistinction to all other approaches it allows to study the production of fragments as well as of hypernuclei in the energy range from $E_{Lab} =500$ AMeV to $\sqrt{s} = 13$ TeV. First tests show that indeed fragments are product at all energies ( as seen experimentally) and that the new approach reproduces almost all the fragmentation data which are available right now. All so the multiplicity and spectra of the produced mesons and baryons are well reproduced.
15:00 Strangeness and charm production at FAIR energies - Marcus Bleicher (Frankfurt Institute for Advanced Studies (FIAS) and University of Frankfurt, Frankfurt, Germany)
Strangeness and charm production at FAIR energies (STARS2017)
- Marcus Bleicher (Frankfurt Institute for Advanced Studies (FIAS) and University of Frankfurt, Frankfurt, Germany)
15:00 - 15:30
We present recent results on the sub- and near threshold production of multi-strange hadrons and of charmed hadrons. These particle allow to explore multi-step processes in dense hadronic matter. We provide an alternative explanation for the observed transparency ratios of Phi-mesons and show how the observed enhanced Cascade production at HADES energies can be explained. For the near and sub-trehsold production of charmed hadrons, we present the first estimates for the SIS-100 energies, indicating that charm studies might still be feasable, even without SIS-300.
15:30 Coffee Break and Poster Session
Coffee Break and Poster Session
15:30 - 16:00
16:00 Ultra-relativistic heavy ion physics highlights – past, present and future - John W. Harris (Yale University, Branford, United States)
Ultra-relativistic heavy ion physics highlights – past, present and future (STARS2017)
- John W. Harris (Yale University, Branford, United States)
16:00 - 16:30
Ultra-relativistic collisions of heavy nuclei at the Large Hadron Collider (LHC) at CERN in Geneva (Switzerland) and the Relativistic Heavy Ion Collider (RHIC) in New York (US) create sufficiently high temperatures that nuclear matter melts into a “soup” of quarks and gluons called the quark-gluon plasma (QGP). Thousands of particles and anti-particles are created in a single event with temperatures reaching T ~ 2 x 10**12 K, some 200,000 times hotter than the sun’s core and expected only within the first microseconds after the Big Bang. Normal hadrons cannot exist at these temperatures. The soup is observed to flow easily, with extremely low viscosity, suggesting a nearly perfect liquid of quarks and gluons. New results have extended the study of the QGP to higher temperatures and penetrating probes. Measurements of very energetic jets, extremely large transverse momentum particles, and heavy flavors indicate a very dense and highly interacting system that is opaque to energetic probes. I will present a motivation for physics in this field, an overview and interpretation of the results, and the elucidate the “big questions” remaining to be answered. I will also offer a perspective on the future of the field as it is presently envisioned.
16:30 Measurement of antiproton production in p-He collisions at LHCb to constrain the secondary cosmic antiproton flux - Giacomo Graziani (INFN, Sezione di Firenze, Italy)
Measurement of antiproton production in p-He collisions at LHCb to constrain the secondary cosmic antiproton flux (STARS2017)
- Giacomo Graziani (INFN, Sezione di Firenze, Italy)
16:30 - 17:00
The flux of cosmic ray antiproton is a powerful tool for indirect detection of dark matter. The sensitivity is limited by the uncertainty on the predicted antiproton flux from scattering of primary protons on the interstellar medium. This is in turn limited by the knowledge of antiproton production cross sections, notably in p-He scattering. Thanks to its internal gas target SMOG, LHCb performed the first measurement of antiproton production from collisions of LHC proton beams on He nuclei at rest. Results and prospects are presented.
17:00 Color transparency in nuclear matter - D. Y. Arrebato (Instituto Superior de Tecnologías y Ciencias Aplicadas (InSTEC), La Habana, Cuba)
Color transparency in nuclear matter (STARS2017)
- D. Y. Arrebato (Instituto Superior de Tecnologías y Ciencias Aplicadas (InSTEC), La Habana, Cuba)
17:00 - 17:30
In this contribution, a model to explain color transparency in QCD is discussed. This model focuses on recreating the interaction of color dipole created from the quantum oscillations of the virtual photons of high energies that intervene in the ultra-peripheral collisions as a consequence of its exchange with the vacuum presented in the VDM model. The interaction of the small size configuration with nucleons the nuclear medium are taken into account by the Feynman diagrams associated to the two-gluon exchange approximation and the color saturation model. In this way, one can calculate the interaction cross section between color dipole and the gluon sea of the nucleon. The calculations are focused on the production of charmonium at small x scenario.
17:30 Supporting the existence of the QCD critical point by compact star observations - David Edwin Alvarez Castillo (Joint Institute for Nuclear Research (JINR), Dubna, Russia)
Supporting the existence of the QCD critical point by compact star observations (STARS2017)
- David Edwin Alvarez Castillo (Joint Institute for Nuclear Research (JINR), Dubna, Russia)
17:30 - 18:00
In order to prove the existence of a critical end point (CEP) in the QCD phase diagram it is sufficient to demonstrate that at zero temperature $T=0$ a first order phase transition exists as a function of the baryochemical potential $\mu$, since it is established knowledge from ab-initio lattice QCD simulations that at $\mu=0$ the transition on the temperature axis is a crossover. We present the argument that the observation of a gap in the mass-radius relationship for compact stars which proves the existence of a so-called third family (aka "mass twins") will imply that the $T=0$ equation of state of compact star matter exhibits astrong first order transition with a latent heat that satisfies $\Delta\epsilon/\epsilon_c > 0.6$. Since such a strong first order transition under compact star conditions will remain first order when going to symmetric matter, the observation of a disconnected branch (third family) of compact stars in the mass-radius diagram proves the existence of a CEP in QCD. Modelling of such compact star twins is based on a QCD motivated NJL quark model with high order interactions together with the hadronic DD2-MEV model fulfilling nuclear observables. Furthermore we show results of a Bayesian analysis (BA) using disjunct M-R constraints for extracting probability measures for cold, dense matter equations of state. In particular this study reveals that measuring radii of the neutron star twins has the potential to support the existence of a first order phase transition for compact star matter.
19:00 Welcome Cocktail
Welcome Cocktail
19:00 - 20:00