Conveners
Cosmology, Astrophysics, Gravity, Mathematical Physics
- Alexander Dolgov
Cosmology, Astrophysics, Gravity, Mathematical Physics
- Francesco Longo
Cosmology, Astrophysics, Gravity, Mathematical Physics
- Elena Arbuzova (Dubna State University and Novosibirsk State University)
Cosmology, Astrophysics, Gravity, Mathematical Physics
- Armen Sedrakian
Cosmology, Astrophysics, Gravity, Mathematical Physics
- Vitor de Souza (Instituto de Fisica de Sao Carlos, Universidade de Sao Paulo)
Cosmology, Astrophysics, Gravity, Mathematical Physics
- Marco Giammarchi (Universitร degli Studi e INFN Milano (IT))
Cosmology, Astrophysics, Gravity, Mathematical Physics
- Luciano Errico (Universitร di Napoli "Federico II" - INFN Sezione di Napoli)
Cosmology, Astrophysics, Gravity, Mathematical Physics
- Konstantin Zhukovsky (Wigner Research Centre for Physics)
Cosmology, Astrophysics, Gravity, Mathematical Physics
- Stefano Passaggio (INFN e Universita Genova (IT))
Cosmology, Astrophysics, Gravity, Mathematical Physics
- Jon Paul Lundquist (University of Nova Gorica - Center for Astrophysics and Cosmology)
Cosmology, Astrophysics, Gravity, Mathematical Physics
- Jon Paul Lundquist (University of Nova Gorica - Center for Astrophysics and Cosmology)
Cosmology, Astrophysics, Gravity, Mathematical Physics
- Carla Aramo
It is generally accepted that the sources of high-energy cosmic rays with energies below $10^{19}$ eV could be catastrophic astrophysical processes. However, the origin of the observed events with higher energies is not yet understood. We propose a mechanism for ultra-high-energy cosmic ray production through the decay and annihilation of superheavy dark matter particles. Such particles are...
The AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) collaboration uses antiprotons from CERNโs Antiproton Decelerator (AD)/Extra Low ENergy Antiproton decelerator (ELENA) complex to produce bound antimatter systems, with a focus on neutral antihydrogen and positronium atoms, and perform experiments on their properties to draw conclusions on fundamental concepts such as CPT...
It is argued, based on 1993 year suggestion, that galaxies, superheavy black holes, or quasars, are seeded by massive primordial black holes, not only in the early universe but in the present day universe as well. This idea is now rediscovered in several recent publications, though the basic features are different. The observational data in favor of this conjecture are presented.
The LIGO, Virgo, and KAGRA (LVK) Collaboration has significantly advanced our understanding of the universe by detecting gravitational waves from a variety of astrophysical sources. This talk will provide an overview of the most recent observations and discoveries made by the LVK detectors. Highlights will include the detection of binary black hole and neutron star mergers, insights into the...
In this presentation, we will present the latest results from the Pierre Auger Observatory. We will discuss the major contributions of the Observatory to the understanding of ultra-high-energy cosmic rays. Recently, the scenario composed by the flux and type of particles and by the arrival direction maps has evolved significantly. The Pierre Auger Observatory data have shown structures in the...
The DAMA/LIBRA experiment (about 250 kg of highly radio-pure NaI(Tl)) at the Gran Sasso National Laboratory (LNGS) of the I.N.F.N. is presented. DAMA/LIBRAโphase2, with improved experimental configuration and lower software energy threshold with respect to the phase1, confirms a signal that meets all the requirements of the model independent Dark Matter (DM) annual modulation signature, at...
In this work we present an evaluation of how site dependent noise can affect the signal to noise ratio (SNR) of compact binary coalescence (CBC) signals in the future 3rd generation gravitational wave (GW) detector Einstein Telescope (ET). Actually, the design of ET is pushing the scientific community to study its scientific potential and to assess its sensitivity with respect to known, and...
The Q & U Bolometric Interferometer for Cosmology (QUBIC) is a novel kind of CMB polarimeter, installed on the Puna plateau in Argentina and inaugurated at the end of 2022. QUBIC is optimized for the measurement of the B-mode polarization of the CMB, one of the major challenges of observational cosmology. The signal is expected to be of the order of a few tens of nK, prone to instrumental...
This talk will present the latest cosmological results from the first data release (DR1) of the Dark Energy Spectroscopic Instrument (DESI). DESI, with its unprecedented spectroscopic capabilities, provides a rich dataset that allows for a precise investigation of the large-scale structure of the universe. We analyze the distribution of galaxies, quasars, and the Lyman-alpha forest to extract...
Despite being known for several decades now, the origin of cosmic rays in the ultra-high-energy (UHE, $E > 10^{17}\:\mathrm{eV}$) region remains uncertain, owing to the rapidly diminishing particle flux and magnetic deflection. The possibility of detecting UHE neutral particles, among them photons, produced in close proximity to the source regions of UHE cosmic rays would provide an...
Transmission muography is an imaging technique that allows 2D and 3D images of the average target density by measuring the transmission of atmospheric muons within the target. The structures studied can be as large as volcanoes, pyramids, archaeological or mining sites, blast furnace, dams and the detectors used in this technique are muon trackers.
In this presentation the potential of the...
The Pierre Auger Observatory is the largest and most important hybrid detector designed to investigate the origin and the nature of ultra-high-energy cosmic rays. The Observatory has been continuously operated since 2004, and has achieved a total detection exposure of approximately 122000 km2sr yr. During over 18 years of research, the Pierre Auger Observatory has collected a huge amount of...
The study of ultra-high-energy cosmic rays allows for the probing of hadronic interactions at energies far exceeding those achievable by human-made accelerators. The Pierre Auger Observatory is the worldโs largest facility for measuring the extensive air showers that emerge from these cosmic rays. Its hybrid design enables the simultaneous measurement of the longitudinal development of the...
The Dark Matter Particle Explorer (DAMPE) is an ongoing space-borne experiment designed for the direct detection of Cosmic Rays (CR). The instrument consists of four sub-detectors, namely: a Plastic Scintillator Detector (PSD), a Silicon TracKer-converter (STK), a deep BGO calorimeter (~32 X0 , ~1.6 ฮปI) and a Neutron Detector (NUD). Following more than 8 years of successful operation, DAMPE...
The LEGEND experimental program is a phased search for neutrinoless double-beta decay (0$\nu\beta\beta$) in the $^{76}$Ge isotope. The first phase, LEGEND-200, aims for a discovery sensitivity at a half life of 10$^{27}$ years and has a background index goal of below 0.5 cts/(FWHM t yr). LEGEND-200 has been operating at LNGS with 142 kg of high-purity germanium (HPGe) detectors and started...
In the course of further processing of data from two similar cosmic ray experiments, carried out in the Tien Shan and Pamir mountains using calorimeters, represented by 2-tier X-ray emulsion chambers (XRECs) with large air gaps (2.12 and 2.5 m, respectively), were obtained distributions of numbers of blackening spots, created by electron-photon cascades (EPCs) on X-ray films, according to the...
Merging together relativity and quantum physics results in non-invariance of quantum vacuum, which is known as the Unruh effect. The phenomenon implies that thermodynamics is susceptible to the chosen reference frame. Here we study the entropy of the Unruh radiation emitted by a spherical source. Estimates are performed for an exponential energy spectrum and homogenesous distribution over any...
In june 2024, the Fermi Gamma-ray Space Telescope has celebrated its $16^{th}$ year of operations. The Large Area Telescope (LAT) is the main instrument onboard the Fermi satellite and is designed to be sensitive to gamma rays in the energy range from about $\unit[20]{MeV}$ up to the $\unit{TeV}$ regime. From its launch, the LAT has collected more than 4.53 billion photon events, providing...
Although the gravitational interaction between matter and antimatter has been the subject of theoretical speculation since the discovery of the latter in 1928, only recently the ALPHA experiment at CERN was able to observe, for the first time, the effects of gravity on antimatter atoms, namely on anti-hydrogen. After an introduction of the concept of antimatter, along with its still unresolved...
Among the most surprising predictions coming from General Relativity, one in particular is about the weight of material bodies. According to Einstein theory, such classical quantity should not be only due to the amount of substance in bodies, but it should also depend from the amount of stress and internal energy stored inside them. Being General Relativity a classical theory, such prediction...
We describe a software pipeline that models atmospheric gamma and hadron showers and their detection and reconstruction by an array of Cherenkov detectors on the ground, as well as the calculation of a utility function aligned with the scientific goals of the SWGO experiment. The variation of the utility with the position of each detector on the ground allows to perform stochastic gradient...
With the knowledge and statistical power derived from two decades of measurements, the Pierre Auger Observatory has significantly advanced our understanding of ultra-high-energy cosmic rays whilst unearthing an increasingly complex astrophysical scenario and tensions with hadronic interaction models. The field now demands primary mass as an observable with an exposure that only the surface...
The SABRE experiment aims to detect an annual rate modulation from dark matter interactions in ultra-high purity NaI(Tl) crystals in order to provide a model independent test of the signal observed by DAMA/LIBRA. It is made up of two separate detectors that rely on joint crystal R&D activity; SABRE South located at the Stawell Underground Physics Laboratory (SUPL), in regional Victoria,...
CTA+ is an Italian projet of the National Program for Resilience and Resistance (PNRR in Italian), funded by the European Union โ NextGenerationEU, to complement the largest research infrastructure dedicated to the study of the very-high energy sky: the Cherenkov Telescope Array Observatory (CTAO), a ground-based gamma-ray observatory currently under construction. Specifically, CTA+ will build...
The Pierre Auger Observatory (Auger), located in Malargรผe, Mendoza, Argentina, spanning 3000 kmยฒ is the largest ultra-high-energy cosmic ray observatory in the world. In recent years, the Observatory has broadened its scope by hosting detectors in collaboration with other experiments and offering a platform for the research and development (R&D) of future detectors.
Key collaborations include...
GRB 221009A, a relatively nearby (redshift z = 0.1505) and exceptionally bright gamma-ray burst, has been detected with the LHAASO-KM2A instrument up to the energy of \approx 13 TeV. The unprecedented fluence of TeV gamma-rays from GRB 221009A allows to set constraints on the strength B of the extragalactic magnetic field (EGMF), excluding the values of B < 10^{-18} G [Dzhatdoev et al., MNRAS...
One of the fundamental questions in physics is the origin of the most energetic cosmic rays. This has been obscured mainly by uncertainties in their mass composition arising from the modelling of hadronic interactions in the air showers that these particles induce. For some time now, discrepancies between model predictions and measured air-shower data have been complicating our efforts. A...
This work presents the more profound study of the cluster structure of gamma families recorded in cosmic rays using X-ray emulsion chambers located at mountain altitudes (โPamirโexperiment). It has been confirmed that, using the ฯ_ij and z_ik metrics for cluster analysis, it is possible to collect products, i.e., particles produced in the last strong interactions which directly contribute to...
The Pierre Auger Observatory, the world's largest ultra-high-energy (UHE) cosmic ray (CR) detector, plays a crucial role in multi-messenger astroparticle physics with its high sensitivity to UHE photons and neutrinos. Recent Auger Observatory studies have set stringent limits on the diffuse and point-like fluxes of these particles, enhancing constraints on dark-matter models and UHECR sources....
The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment searching for 0ฮฝฮฒฮฒ decay that has successfully reached the one-tonne mass scale. The detector, located at the LNGS in Italy, consists of an array of 988 TeO2 crystals arranged in a compact cylindrical structure of 19 towers. CUORE began its first physics data run in 2017 at a base temperature of...
