Conveners
Astroparticle Physics and Cosmology: Astroparticle Physics and Cosmology
- Leïla Haegel (IP2I Lyon)
Astroparticle Physics and Cosmology: Astroparticle Physics and Cosmology
- Malak Ait Tamlihat (Mohammed V University)
The gravitational-wave window onto the Universe has been opened with the first detection of a binary black hole in 2015. Since then, the LIGO-Virgo-KAGRA Collaboration has published 90 probable detections from three complete observing runs of the advanced-generation laser-interferometric detectors. These have enabled many new insights into the astrophysics of compact objects and the...
The groundbreaking detection of gravitational waves generated by compact binary mergers ignited the birth of gravitational wave astronomy. In less than a decade, the Earth-based network of advanced interferometers, LIGO, Virgo, and KAGRA, has transformed various scientific fields, from astrophysics and cosmology to nuclear and fundamental physics, reshaping our understanding of the...
The LHAASO collaboration has more than 280 members from 32 institutes in 5 countries. The commission of LHAASO in 2021 opened the epoch of ultra-high-energy (UHE) gamma-ray astronomy and paved the way to address the origin of cosmic rays up to hundreds of PeV. Located at Daocheng, Sichuan, on the eastern edge of the Tibetan plateau with an elevation of 4410 meters above the sea level (Figure...
The thermal phase transitions of the AdS black holes are controlled through a stochastic process and are a function of an order parameter. The dynamics during its phase transitions is determined through the fluctuating macroscopic variables, we recall the Fokker-Planck equation to study the evolution of such a process in the Born-Infeld-AdS background. Moreover, we discuss about the critical...
We start with a general introduction to the problem of neutrino electromagnetic properties [1]. Then we consider the most stringent experimental constraints on neutrino magnetic µν and electric dν moments, millicharge qν, charge radii <rν2> and anapole aν moments from the terrestrial experiments (the bounds from MUNU, TEXONO, GEMMA, Super-Kamiokande, Borexino, COHERENT, XENON1T, CONUS and the...
Core-collapse supernovae (CCSNe) play a significant role in our understanding of the Universe's dynamics. The time profile of neutrinos emitted during these supernovae offers valuable insights into the mechanism behind collapsing stars and the behavior of particles in extremely dense environments. The detection of neutrinos from the SN1987A supernova in the Large Magellanic Cloud marked a...
We present the results from the analysis of the down-going flux of nuclearites, based on data collected over a period of nine years (2009 to 2017) using the ANTARES neutrinos telescope. The results exhibit a remarkable enhancement compared to previously reported results. Notably, they represent the pioneering observation made by a neutrino telescope regarding nuclearites, setting the most...
In this contribution we continue our studies [1,2] of neutrino oscillations in a magnetic field. We consider neutrino flavour and spin oscillations in a magnetic field within the formalism of wave packets. Decoherence effects due to the wave packets separation are studied. The coherence lengths for oscillations on both vacuum $\omega^{vac}_{ij} = \Delta m^2_{ij}/4E_\nu$ and magnetic...
It is well-known that dense matter can strongly affect the neutrino moving through it. It has been recently realized that transversal matter motion can substantially change neutrino dynamics in some astrophysical settings and, in particular, leads to the appearance of spin oscillations (see [1] and references therein). In this work we investigate neutrino quantum sates in transversally moving...
The entropy of von-Neumann can be computed directly by describing the density matrix of the associated system. For black holes however, it is rather difficult to evaluate this entropy because before all else we must have a quantum formulation of this gravitational system. We outline the derivation of a gravitational fine-grained entropy using a quantum extremal surface that extremizes the...
[Abstract pdf file attachement][1]
In this work, we study a model of holographic dark energy using FLRW cosmology in the context of modified gravity. An extension of the symmetric teleparallel gravity is obtained by considering the gravitational action $L$ is given by an arbitrary function $f$ of the non-metricity $Q$, where the nonmetricity Q is responsible for the gravitational interaction,...
