Conveners
Special session on Astro-Cosmo-Gravity
- Hovik Grigorian
Special session on Astro-Cosmo-Gravity
- Martin Pohl (DESY)
Special session on Astro-Cosmo-Gravity
- Jorge Alfaro (Pontificia Universidad Católica de Chile)
Special session on Astro-Cosmo-Gravity
- Anna Pollmann (University of Wuppertal)
Special session on Astro-Cosmo-Gravity
- Camilla Maggio (UAB)
Special session on Astro-Cosmo-Gravity
- David Blaschke (University of Wroclaw)
The AEgIS experiment at CERN’s Antiproton Decelerator aims to perform a direct test of the Weak Equivalence Principle for antimatter by measuring the local gravitational acceleration for antihydrogen. The first step towards this goal is the formation of a pulsed, cold antihydrogen beam, which will be created by a charge exchange reaction between laser excited (Rydberg) positronium and cold...
The two Major Atmospheric Gamma Imaging Cherenkov (MAGIC) telescopes, placed at the Roque de los Muchachos European Northern Observatory on the Canary Island of La Palma (Spain), observe gamma-rays in the VHE energy range, starting from 30GeV to around 100TeV. This wide interval of energies allows to include different kind of sources in the schedule of observation, spreading from black hole...
A gravitational field model based on two symmetric tensors, $g_{μν}$ and $\tilde{g}_{μν}$, is presented. In this model, new matter fields are added to the original matter fields, motivated by an additional symmetry (δ symmetry). We call them δ matter fields. We find that massive particles do not follow geodesics, while trajectories of massless particles are null geodesics of an effective...
Electromagnetic cascading of TeV-band gamma-ray emission from distant blazars is a means to investigate the amplitude of magnetic field in the voids of intergalactic space. The flux of cascade emission from some objects is weaker than it should be, leaving two interpretation. The magnetic field may be strong enough to deflect the electron-positron pairs out of the line of sight. Alternatively...
The identification of dark matter is one of the major open questions in physics, astrophysics, and cosmology. One approach consists of detecting the nuclear recoils produced by the collisions between the putative dark matter particles and a detector’s target nuclei. The CRESST-III experiment (Cryogenic Rare Event Search with Superconducting Thermometers), located at the underground facility of...
A model of fully developed turbulence of a compressible fluid is reviewed, an overview of turbulent regimes of a compressible fluid will be presented. Fluid dynamics is governed by stochastic version of Navier-Stokes equation. We show how corresponding field theoretic model can be obtained and further analyzed by means of the perturbative renormalization group (RG). In this approach, scaling...
The causal structure of a spacetime $\mathcal{M}$ is usually described in terms of a binary relation $\preceq$ between events called the casual precedence relation (often referred to as $J^+$). In my talk I will present a natural extension of $\preceq$ onto the space $\mathscr{P}(\mathcal{M})$ of (Borel) probability measures on $\mathcal{M}$, designed to rigorously encapsulate the common...
The IceCube Neutrino Observatory is situated at the geographic South Pole where 1km3 of ice is instrumented with 5160 optical sensors. Neutrinos are detected via their charged interaction secondaries which produce light in various ways when passing through ice. Likewise additional kinds of particles can be detected, such as muons originating from cosmic ray air showers or particles proposed...
Weakly Interacting Massive Particles (WIMPs) remain one of the most promising dark matter candidates. Many experiments around the world are searching for WIMPs and currently the best sensitivity to WIMP-nucleon spin-independent cross-section is about $10^{-10}$ pb. LUX has been one of the world-leading detectors in a search for dark matter WIMPs. Results from the LUX experiment on WIMP...
The measurement of cosmic neutrinos is a new and unique method to observe the Universe. Neutrinos are chargeless, weakly interacting particles that can cross dense matter or radiation fields without being absorbed for cosmological distances. Indeed, they are a complementary probe with respect to other messengers such as multi-wavelength light and charged cosmic rays allowing the observation of...
R. Muradyan (piano), S. Nor(violin), V. Nor(cello), "In memory of a great artist", Trio by P.I. Tchaikovsky, Part II-A
The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment searching for neutrinoless double beta decay that has been able to reach the 1-ton scale. The detector consists of an array of 988 TeO2 crystals arranged in a cylindrical compact structure of 19 towers. The construction of the experiment and, in particular, the installation of all towers in the...
The initial motivation for this study was to deeper investigate fundamentals of relativity by developing the framework that is consistent with existence of a privileged frame but, like the standard relativity theory, is based on the relativity principle and the universality of the (two-way) speed of light and is also preserving the group structure of the set of transformations between inertial...
GERDA (Germanium Detector Array) is an experimental project searching for Neutrinoless Double Beta Decay of Ge-76. It is operational at Laboratori Nazionali Del Gran Sasso of INFN, since 2009, it underwent a couple of upgrades with the aim of increasing the Exposed mass, while improving the Signal to Background Discrimination, the Background Index, while keeping the excellent stability and...
Among the theoretical models addressing the dark matter problem, the category based on a secluded sector are gaining an increasing interest. The PADME experiment, at the Laboratori Nazionali di Frascati (LNF) of INFN, is designed to be sensitive to the production of a low mass gauge boson A’ of a new U(1) symmetry holding for dark particles.
This “dark photon” is weakly coupled to the...
One of the most long-standing puzzles in nuclear astrophysics is the so-called “Cosmological Lithium Problem”. The standard Big Bang nucleosynthesis theory (BBN) predicts the abundances of the light elements $^{2}$H, $^{3}$He, $^{4}$He and $^{7}$Li produced in the early universe. The primordial abundances of $^{2}$H and $^{4}$He inferred from experimental data are in good agreement with...
Recent developments, results and perspectives in double beta decay experiments at LNGS by using HPGe detectors and crystal scintillators, various approaches and various isotopes, will be presented. The measurements here presented have been performed in experimental set-ups of the DAMA collaboration. These set-ups are optimized for low-background studies and operate deep underground at the...
CUPID-0 is the first large mass experiment based on cryogenic calorimeters (bolometers) which implements the dual read-out of light and heat for background rejection. The detector, consisting of 24 enriched Zn 82Se crystals (5.28 kg of 82Se), is taking data in the underground LNGS (Italy) from March 2017. In this talk I will present the analysis that allowed to set the most stringent limit on...
Neutron-star mergers are interesting for several reasons: they are proposed as the progenitors of short gamma-ray bursts, they have been speculated to be a site for the synthesis of heavy elements, and they emit gravitational waves possibly detectable at terrestrial facilities. The understanding of the merger process, from the pre-merger stage to the final compact object-accreting system...
A Bayesian analysis of new hybrid nuclear equation of state models with quark-hadron pasta phase is performed using modern observational data of compact stars including those from the binary neutron star merger GW170817 [1]. The hybrid stellar models are based on a RMF model of the hadronic phase [2] and a relativistic density functional approach to the quark matter phase [3]. The occurrence...
Solar neutrinos have played a central role in the discovery of the neutrino oscillation mechanism. They still are proving to be a unique tool to help investigate the fusion reactions that power stars and further probe basic neutrino properties. The Borexino neutrino observatory has been operationally acquiring data at Laboratori Nazionali del Gran Sasso in Italy since 2007. Its main goal is...
Compact star physics is in fact a way to study the state of matter under conditions of extreme compression. However, there are no direct experimental or observational methods for investigating the internal structure and content of stellar matter. Therefore, the theoretical modeling of different situations and the presence of tension in explanations of observational data on compact stars are...
