Description
Conveners:
Livia Conti (INFN)
Carlos Perez de los Heros (Uppsala University)
Martin Tluczykont (Universität Hamburg)
Gabrijela Zaharijas (UNG)
Contact: eps23-conveners-t01 @desy.de
NUSES is a new space mission project aiming to test innovative observational and technological approaches related to the study of low energy cosmic and gamma rays, high energy astrophysical neutrinos, Sun-Earth environment, Space weather and Magnetosphere-Ionosphere-Lithosphere Coupling (MILC). The satellite will host two experiments, named Terzina and Zirè. While Terzina will focus on space...
Axionlike particles (ALPs) are predicted in many extensions of the Standard Model and are viable dark matter candidates. These particles could mix with photons in the presence of a magnetic field. Searching for the effects of ALP-photon mixing in gamma-ray observations of blazars has provided some of the strongest constraints on ALP parameter space so far. For the first time, we perform a...
The High Energy cosmic-Radiation Detection (HERD) facility, planned for launch in 2027 and is one of the scientific payloads on board of the Chiniese Space Station. HERD's primary scientific objectives covers several high energy astrophysics topics, including the search for dark matter annihilation products, precise measurements of the cosmic electron (and positron) spectrum beyond 10 TeV,...
The IceCube Neutrino Observatory has detected neutrinos from various astrophysical sources with its 1km3 detector volume in Antarctic ice. IceTop, the cosmic-ray detector on the surface of IceCube, consists of 81 pairs of ice-Cherenkov tanks. The rise in threshold of measurements due to accumulating snow inspired the next generation of South Pole detectors comprising of elevated...
The Baikal-GVD is a large neutrino telescope being under construction in Lake Baikal. Recently it is the largest neutrino telescope operating in Northern Hemisphere. The result of the winter expedition of 2023 is the three-dimensional array of 3 456 photo-sensitive units (optical modules). The data collection is allowed by the design of the experiment while being in a construction phase. In...
The KM3NeT Collaboration is incrementally building a network of water-Cherenkov neutrino observatory in the Mediterranean Sea, consisting of two telescopes, named ARCA (Astroparticle Research with Cosmics in the Abyss) and ORCA (Oscillation Research with Cosmics in the Abyss), sharing the same detection technology. ARCA, located off the shores of Sicily, in its completed shape will be a...
The ANTARES neutrino telescope was operational in the Mediterranean Sea from 2006 to 2022. The detector array, consisting of 12 lines with a total of 885 optical modules, was designed to detect high-energy neutrinos covering energies from a few tens of GeV up to the PeV range. Despite the relatively small size of the detector, the results obtained are relevant in the field of neutrino...
The IceCube Neutrino Observatory is a cubic-kilometer scale neutrino detector at the South Pole. IceCube consists of over 5000 photosensors deployed on cables deep in the Antarctic ice. The sensors detect neutrinos via the Cherenkov light emitted by secondary particles produced in neutrino interactions.
With the measurement of the isotropic astrophysical neutrino flux in the TeV-PeV energy...
Astrophysical hypotheses suggest the existence of neutrinos beyond the energy range currently reached by optical detectors (> 10 PeV). The observation of such particles by capturing the coher- ent emission of their interaction in ice, i.e. Askaryan radiation, is the aim of the Radio Neutrino Observatory in Greenland (RNO-G). Located at Summit Station, RNO-G represents the first neu- trino...
Continuous gravitational waves are long-duration gravitational-wave signals
that still remain to be detected.
These signals are expected to be produced by rapidly-spinning
non-axisymmetric neutron stars, and would provide valuable information on the
physics of such compact objects; additionally, they would allow us to probe the
galactic population of EM-dark neutron stars, whose...
The 5n-vector ensemble method is a statistical multiple test for the targeted search of continuous gravitational waves from an ensemble of known pulsars. This method can improve the detection probability combining the results from individually undetectable pulsars if few signals are near the detection threshold. In this presentation, I show the results of the 5n-vector ensemble method...
The first observation of gravitational waves (GWs) with laser interferometers of the LIGO collaboration in 2015 was about 100 years after their prediction within general relativity. In this talk we focus on the detection of gravitational waves in a higher frequency regime with superconducting radio frequency (SCRF) cavities. This approach has already been considered as probes for GWs before...
The IceCube Neutrino Observatory has measured the high-energy astrophysical neutrino flux but has not yet detected prompt atmospheric neutrinos originating from charmed meson decays. Understanding the prompt neutrino flux is crucial for improving models of high-energy hadronic interactions and advancing astrophysical neutrino measurements. We present a combined analysis of cascades and...
We investigate the kinematical regions that are important for producing prompt neutrinos in the atmosphere and in the forward region of the LHC, as probed by different experiments. We illustrate the results in terms of the center-of-mass nucleon-nucleon collision energies and rapidities of neutrinos and of the parent heavy-flavoured hadrons. We find overlap in only part of the kinematic space...
In recent years, the IceCube Neutrino Observatory has started to unravel the high-energy neutrino sky. The discoveries of TXS0506+056 and NGC1068 as neutrino emitters and neutrino emission from the galactic plane hint at a zoo of possible neutrino sources. However, open questions regarding the production mechanisms remain that require a new generation of neutrino telescopes to answer.
The...
Dark compact objects, like primordial black holes, can span a large range of masses depending on their time and mechanism of formation. In particular, they can have subsolar masses and form binary systems with an inspiral phase that can last for long periods of time. Additionally, these signals have a slow increase of frequency, and, therefore, are well suited to be searched with continuous...
The current and upcoming generations of gravitational wave experiments represent an exciting step forward in terms of detector sensitivity and performance. Key upgrades at the LIGO, Virgo and KAGRA facilities will see the next observing run (O4) probe a spatial volume around four times larger than the previous run (O3), and design implementations for e.g. the Einstein Telescope, Cosmic...
Dust particles (diameter ≳0.5um) present inside the clean environments of the ground based interferometric detectors of gravitational waves can contribute to scatter light significantly, adding to the residual scattering originated by imperfections of high quality optical components. Stray light, i.e. light that leaves the main optical beam, picks up phase noise by reflecting off of...
The LIGO-Virgo detections made so far have neglected the realistic astrophysical environment where the compact binaries live. Gravitational wave emission will be affected by the source surroundings and the environment imprints should be observable in a dephasing of the emitted signal with respect to the vacuum scenario.
We present a first investigation on environmental effects for the events...
The current catalog of gravitational waves (GWs) from binary black hole (BBH) mergers allows to conduct refined tests to probe the validity of the general relativity (GR) theory against alternative predictions. It has been proposed that black holes (BHs) may have exotic characteristics making them different from GR BH. Such exotic compact objects (ECOs) would radiate repeated GW pulses of...
Star clusters are the dynamical formation channel for binary black holes (BBHs). In these dense systems, BBH mergers are driven by gravitational wave emission and binary-single encounters with other objects in the environment. The talk will focus on the gravitational wave (GW) signals generated by close encounters between a BBH and a third black hole, highlighting the various outcomes that can...
Gravitational-wave (GW) observations provide unique information about compact objects and, as detectors sensitivity increases, new astrophysical populations could emerge. Close hyperbolic encounters are one such example: black holes and neutron stars are expected to have unbound orbits in dense clusters, that manifest as GW burst signals in the frequency band of current detectors.
In this...
We derive limits on the intrinsic charm (IC) content of the proton,
considering various theoretical models for IC, using as a basis
the results on the upper limit of prompt neutrino fluxes from the IceCube
collaboration. We work under the hypothesis that both the standard
heavy-flavour production and decay mechanism, mainly driven by gluon-gluon partonic interactions in pQCD, and the one...
The IceCube Neutrino Observatory is a cubic-kilometer ice Cherenkov detector located at the geographic South Pole. Thousands of photomultipliers embedded in the deep glacial ice have been used to successfully detect and reconstruct astrophysical neutrino interactions over the last decade. This rich data set has provided evidence for several astrophysical neutrino sources, demonstrating that...
The accretion of dark matter around the black hole could lead to the formation of surrounding halo. Such a dark matter dressed black hole can leave characteristic imprints in the observations of gamma-ray and gravitational waves, which can be used to explore the nature of dark matter.
Non-linear memory is one of the most intriguing predictions of general relativity which is generated by the passage of gravitational waves leaving the spacetime permanently deformed. A GW signal from for example binary black hole can be thought of having two parts the oscillatory part which is known as the “chirp” and a much fainter non-oscillatory (DC like) part which is the non-linear...
Domain Walls (DW) are 2-dimensional topological defects predicted by several theories beyond the Standard Model. They are expected to arise from the breaking of a discrete symmetry in the early universe. The motion and the eventual annihilation of these objects are projected to generate a stochastic background of gravitational waves (GW), that could in principle be probed by ground-based GW...
Gravitational wave detection is a powerful tool that provides us with new ways to understand the universe. However, certain parameters, such as inclination and distance, are degenerate. This limitation hinders our ability to accurately measure other important factors like precession. Breaking the degeneracy between inclination and distance can also give us new insights into formation channels...
By means of the code HARM_COOL, which works for conservative relativistic magnetohydrodynamics, we developed a new scheme for the simulation of system formed after compact binary merger. Our code works with a tabulated equation of state of dense matter, accounts for the neutrino leakage, and follows the mass outflows via tracer particle method.
I will discuss the numerical scheme, and compare...
Ultra-low mass primordial black holes (PBH) which may briefly dominate the energy density of the universe but completely evaporate before the big bang nucleosynthesis (BBN), may lead to interesting observable signatures. We propose a novel test of this scenario by detecting its characteristic doubly peaked gravitational wave (GW) spectrum in future GW observatories. Here the first-order...
