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Alexander Dolgov7/10/23, 3:50 PMCosmology, Astrophysics, Gravity, Mathematical PhysicsLecture
A review of the recent data of James Webb Space Telescope and Hubble Space Telescope on the early formed galaxies and quasars is presented. It is argued that the tension between the observational data and the conventional cosmological model could be eliminated by primordial black holes (PBH). An appropriate mechanism of PBH formation is described. Also news on the galactic antimatter...
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Alexander Sorin (Joint Institute for Nuclear Research, Dubna), Prof. Alexander Sorin (Joint Institute for Nuclear Research (RU))7/10/23, 5:35 PMCosmology, Astrophysics, Gravity, Mathematical PhysicsTalk
The Coleman approach to the false vacuum decay is revised. An infinite class of potentials for which the Coleman instantons do not exist is constructed. For such potentials, false vacuum decay is provided by new instantons with a quantum core. For a potential unbounded from below or having a true vacuum with a depth exceeding the barrier height, the materialized bubble dominating in the vacuum...
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Pierluigi Belli7/12/23, 11:50 AMCosmology, Astrophysics, Gravity, Mathematical PhysicsTalk
The features and the results of DAMA/LIBRA–phase2 experiment at Gran Sasso are presented. DAMA/LIBRA–phase2, 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 annual modulation signature, at high C.L. The model independent DM
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annual modulation result is... -
Giacomo Principe7/12/23, 4:00 PMCosmology, Astrophysics, Gravity, Mathematical PhysicsTalk
The Fermi Gamma-ray Space Telescope is currently celebrating its 15th anniversary of operation. Since its launch, the Fermi-Large Area Telescope (LAT), the main instrument onboard the Fermi satellite, has remarkably unveiled the sky at GeV energies providing outstanding results in time-domain gamma-ray astrophysics. In particular, LAT has observed some of the most powerful transient phenomena...
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Roberta Pillera (Universita e INFN, Bari (IT))7/12/23, 4:20 PMCosmology, Astrophysics, Gravity, Mathematical PhysicsTalk
In this contribution we present the analysis of GRB221009A, the brightest Gamma-Ray Burst (GRB) ever detected by the Fermi Large Area Telescope (LAT). The burst triggered the Gamma-Ray Burst Monitor (GBM), and the high-energy emission of the triggering pulse started in the LAT before the associated low-energy component detected by the GBM. During the prompt phase, we identified a Bad Time...
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Francesco Loparco (Universita e INFN, Bari (IT))7/13/23, 11:50 AMCosmology, Astrophysics, Gravity, Mathematical PhysicsTalk
The Fermi Gamma-ray Space Telescope was launched into Earth orbit in June 2008 and is celebrating its 15th year of operation. 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 20 MeV up to the TeV regime. From its launch, the LAT has collected more than 4.25 billion photon events,...
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Alice Campani7/13/23, 12:15 PMCosmology, Astrophysics, Gravity, Mathematical PhysicsTalk
The ICARUS collaboration has employed the 760-tonne T600 detector in a successful three-year physics run at the underground LNGS laboratory, performing a sensitive search for LSND-like anomalous $\nu_{e}$ appearance in the CERN Neutrino to Gran Sasso beam. This helped constraining the allowed neutrino oscillation parameters to a narrow region around 1 eV$^{2}$. After a significant overhaul at...
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Jakub Zielinski (Warsaw University of Technology (PL))7/17/23, 10:00 AMCosmology, Astrophysics, Gravity, Mathematical PhysicsTalk
The AE$\overline{\rm{g}}$IS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) is one of the experiments at the Antiproton Decelerator (AD) complex at CERN.
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It is working toward probing the Weak Equivalence Principle for antimatter by measuring the influence of gravity on a horizontal flight path of neutral antihydrogen atoms. The pulsed beam of antihydrogen is achieved by means... -
Dr Sandro Gonzi (Università degli Studi di Firenze e INFN), Dr Sandro Gonzi (University of Florence (Department of Physics and Astronomy), National Institute for Nuclear Physics INFN (Division of Florence), National Research Council CNR (Institute of Applied Physics IFAC))7/18/23, 4:00 PMCosmology, Astrophysics, Gravity, Mathematical PhysicsTalk
The Calorimetric Electron Telescope (CALET) is a cosmic-ray observatory operating since October 2015 aboard the International Space Station (ISS). The primary scientific goal of the CALET mission is to perform a high-precision measurement of the inclusive spectrum of cosmic electrons and positrons up to about 20 TeV, where the shape of the spectrum might indicate the presence of nearby...
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Valentina Dompè7/18/23, 4:20 PMCosmology, Astrophysics, Gravity, Mathematical PhysicsTalk
"Neutrinoless double-beta decay (0νββ) is a key process to address some of the major outstanding issues in particle physics, such as the lepton number conservation and the Majorana nature of the neutrino. Several efforts have taken place in the last decades in order to reach higher and higher sensitivity on its half-life. The next-generation of experiments aims at covering the...
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Elena Arbuzova (Dubna State University and Novosibirsk State University)7/19/23, 9:30 AMCosmology, Astrophysics, Gravity, Mathematical PhysicsTalk
Realistic candidates for dark matter particles should be either absolutely stable or have life-time significantly exceeding the universe age. However, as it was argued by Zeldovich, all particles are intrinsically unstable because of formation of virtual black holes. We consider multidimensional generalization of gravity that naturally allows for superheavy dark matter particles. We estimate...
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Masahiro Morikawa7/19/23, 10:00 AMCosmology, Astrophysics, Gravity, Mathematical PhysicsTalk
1/f fluctuations abound in nature. From solid-state physics to nervous and biological systems, oceans, astrophysics, and Universe, there are very low-frequency signals whose time series power spectrum is f^α (-1.5<α<-0.5) for the frequency f. Since Johnson’s first discovery of 1/f fluctuation in a vacuum tube experiment in 1925, the origin of it has been studied, but there has been no...
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Alexander Migdal (NYU)7/19/23, 11:00 AMCosmology, Astrophysics, Gravity, Mathematical PhysicsTalk
We develop a quantitative microscopic theory of decaying Turbulence by studying the dimensional reduction of the Navier-Stokes loop equation for the velocity circulation. We have found an infinite dimensional manifold of solutions of the Navier-Stokes loop equation\cite{M93, M23PR} for the Wilson loop in decaying Turbulence in arbitrary dimension $d >2$. This family of solutions corresponds to...
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Annarita Margiotta (Universita e INFN, Bologna (IT))7/19/23, 11:50 AMCosmology, Astrophysics, Gravity, Mathematical PhysicsTalk
ANTARES was the first undersea neutrino telescope. Its working principle was based on the detection of Cherenkov photons emitted along the path in seawater of relativistic charged particles produced in neutrino interactions in proximity of the detector.
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It operated in its full configuration from May 2008 up to February 2022, at about 2500 m below the surface of the Mediterranean Sea, in front... -
Simone Sanfilippo (INFN - LNS)7/19/23, 12:15 PMCosmology, Astrophysics, Gravity, Mathematical PhysicsTalk
Elementary particle physics offers an attractive solution to explain non-baryonic dark matter in the form of relic Weakly Interacting Massive Particles (WIMPs). In our galaxy, dark matter might constitute a halo, extending far beyond the visible disk, whose properties are inferred e.g. from the rotational kinematics of the visible matter. WIMPs could be directly detected, as the Earth passes...
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Valentina Mangano (INFN - Roma1 , Sapienza (Italy))7/19/23, 12:40 PMCosmology, Astrophysics, Gravity, Mathematical PhysicsTalk
The main objective of Archimedes is to weigh the vacuum, namely, to investigate the interaction of vacuum fluctuations with the gravity.
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Precisely, the small weight variations induced in two high temperature superconductors will be measured using a high sensitivity balance.
These superconductors (YBCO or GdBCO) may "trap" or "expel" vacuum energy when their temperatures are greater or... -
Mathias Régnier7/19/23, 4:20 PMCosmology, Astrophysics, Gravity, Mathematical PhysicsTalk
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...
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Maik Selch (Ariel University)7/19/23, 4:40 PMTalk
We present a stationary spherically symmetric solution of the Einstein equations, with a source generated by a scalar field of q-theory.
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In this theory Riemannian gravity, as described by the Einstein - Hilbert action, is coupled to a three - form field that
describes the dynamical vacuum. Formally it behaves like a matter field with its own stress - energy tensor, equivalent to a scalar... -
Yury Suvorov (UNINA / INFN Sez. Napoli)7/19/23, 5:00 PMCosmology, Astrophysics, Gravity, Mathematical PhysicsTalk
DarkSide-20k is the final detector of the DarkSide direct dark matter search program that involves the researchers from the global collaboration formed by all major current Argon-based experiments (GDMAC). DarkSide-20k is a 20-tonne fiducial mass dual-phase Liquid Argon Time Projection Chamber (LArTPC) filled with low radioactivity argon equipped with SiPM-based cryogenic photosensors. The...
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Masahiro Morikawa7/20/23, 7:00 PMCosmology, Astrophysics, Gravity, Mathematical PhysicsTalk
I’ll talk about the universal 1/f fluctuations in music. Showing some pieces of orchestra music, Serenade for Strings (Tchaikovsky), etc., I’ll explain the origin of the music 1/f fluctuations as the sound beat of unison (amplitude modulation). Using the Kuramoto and spin models, which exhibit the synchronization of frequencies, I'll demonstrate that any demodulation method is indispensable to...
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Nemanja Kaloper (UC Davis)Cosmology, Astrophysics, Gravity, Mathematical PhysicsTalk
We exhibit a mechanism which dynamically adjusts cosmological constant toward 0+. The adjustment is quantum-mechanical, discharging cosmological constant in random discrete steps. It renders de Sitter space unstable, and triggers its decay toward Minkowski. Since the instability dynamically stops at Λ=0, the evolution favors the terminal Minkowski space without a need for anthropics. The...
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Vaibhav KalvakotaCosmology, Astrophysics, Gravity, Mathematical PhysicsTalk
In this talk, we will look at the relation between the No Transmission principle and the Strong cosmic censorship (SCC), which we will highlight in the background of quantum gravity. We show that taking quantum gravity into account, one can provide a complete picture of the instability of the inner horizon and the principle that two independent CFTs, under the gauge-gravity duality, imply that...
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