Conveners
Dark matter
- Valentina De Romeri (IFIC UV/CSIC)
Dark matter
- Valentina De Romeri (IFIC UV/CSIC)
Dark matter
- Valentina De Romeri (IFIC UV/CSIC)
Unveiling the nature of dark matter is one of the major endeavors of our century.
The search for dark matter is developed across multiple channels and with different techniques.
In particular, indirect searches aim at disentangling dark matter signals above the largely dominant astrophysical background in the flux of cosmic particles, such as charged cosmic rays and gamma rays. Limits on the...
Understanding the nature of the Dark Matter has shown to be one of the biggest challenges faced in the XXI century by Cosmology, Astrophysics and Particle Physics. It will require following complementary approaches. Among them, dark matter direct detection strategy has developed since the eighties of the past century, increasing strongly the detection sensitivity by introducing new detection...
Primordial black holes (PBHs) are potential dark matter candidates whose masses can span over many orders of magnitude. If they have masses in the 1015−1017 g range, they can emit sizeable fluxes of MeV neutrinos through evaporation via Hawking radiation. We explore the possibility of detecting light (non-)rotating PBHs with future neutrino experiments. We show that future neutrino experiments...
The Peccei-Quinn solution to the strong CP problem has a problematic aspect: it relies on a global U(1) symmetry which, although broken at low energy by the QCD anomaly, must be an extremely good symmetry of high-energy physics. This issue is known as the Peccei-Quinn quality problem. We propose a model where the Peccei-Quinn symmetry arises accidentally and is respected up to high-dimensional...
We estimate the sensitivity of the Cherenkov Telescope Array (CTA) to detect diffuse gamma-ray emission from the Perseus galaxy cluster, both from interactions of cosmic rays (CR) with the intra-cluster medium, or as a product of annihilation or decay of dark matter (DM) particles in case they are weakly interactive massive particles (WIMPs). The observation of Perseus constitutes one of the...
In these talk we highlight the main results about dark matter (DM) search in dwarf irregular galaxies with the Fermi Large Area Telescope. We analyze 11 years of Fermi-LAT data corresponding to the sky regions of 7 dwarf irregular (dIrr) galaxies. DIrrs are DM dominated systems, recently proposed as interesting targets for the indirect search of DM with gamma-rays. We create a spatial template...
In this talk I will explain how the polarization of photons emitted by astrophysical sources might be altered as they travel through a medium of dark matter composed of ultra light axion-like particles (ALPs). I will describe a new, more robust, analysis we delevoped to search for this effect. Afterwards, I will show the resulting strong limits on the axion-photon coupling for a wide range of...
We fit galactic rotation curves obtained by SPARC from dark matter haloes that are
not spherically symmetric, but allowed to become prolate or oblate with a higher-
multipole density distribution. This is motivated by observing that the flattening of
v(r)=constant is the natural Kepler law due to a filamentary rather than a spherical
source, so that elongating the distribution could bring...
In this work, we carry out a suite of specially-designed numerical simulations to shed further light on dark matter (DM) subhalo survival at mass scales relevant for gamma-ray DM searches, a topic subject to intense debate nowadays. Specifically, we have developed and employed an improved version of DASH, a GPU N-body code, to study the evolution of low-mass subhaloes inside a Milky Way-like...
ANAIS (Annual modulation with NaI Scintillators) is a direct dark matter detection experiment whose goal is to confirm or refute in a model independent way the highly controversial positive annual modulation signal reported by DAMA/LIBRA collaboration for more than twenty cycles. ANAIS-112, consisting of 112.5 kg of NaI(Tl) scintillators, is presently in data taking phase at the Canfranc...
