Conveners
Parallel: Astroparticle 1
- Kensuke Akita (IBS-CTPU)
I will describe the sensitivity reach of the next-generation large underground neutrino oscillation experiment Jiangmen Underground Neutrino Observatory (JUNO) in order to detect the $5.49$ MeV hidden vector flux produced in the $p\left(d,^3\!{\rm He}\right)\gamma^\prime$ nuclear reaction. Based on the JUNO’s energy resolution capability and detector volume, we perform a systematic analysis...
Primordial black holes (PBHs) have been proposed as potential dark matter candidates and viable sources of axion-like particles (ALPs). Since ALPs primarily decay into photons, this process enables the detection of enhanced photon spectra with sensitive detectors. In this study, we develop a novel methodology for estimating photon spectra by considering significant redshift effects and...
The SPI/INTEGRAL observations reveal a remarkable 511keV gamma-ray line in the Galactic center region. However, astrophysical sources solely have not explained the 511keV emission from the positron annihilation. In this study, we explore the role of dark matter (DM) in shedding light on the line's morphology. We postulate that primordial black holes (PBHs), a compelling candidate for DM, emit...
We propose a model of baryogenesis achieved by the annihilation of non-thermally produced WIMPs from Primordial Black Hole (PBH). Dark Matter (DM) particles can be produced by PBH evaporation and consequently re-annihilate into lighter particles even after thermal freeze-out. The re-annihilation of DM provides the observed baryon asymmetry and the correct relic abundance of DM depending on the...
Weakly Interacting Massive Particles (WIMPs) can be captured in compact stars such as white dwarves (WDs) located in a dark matter(DM)-rich environment, leading to an increase in the star luminosity through their annihilation process. N-body simulations suggest that the core of the M4 globular cluster (where plenty of WDs are observed) is rich of dark matter. Assuming this is the case, I will...
We present a unified framework accommodating the matter-anti-matter asymmetry of the Universe as well as asymmetric dark matter. The out-of-equilibrium decay of the heavier right-handed neutrinos are shown to generate both, the matter anti-matter asymmetry of the visible sector
through leptogenesis, as well as dark matter bearing a concomitant stamp of asymmetry. The asymmetry in the dark...
We propose a model of baryogenesis achieved by the annihilation of non-thermally produced WIMPs from Primordial Black Hole (PBH). Dark Matter (DM) particles can be produced by PBH evaporation and consequently re-annihilate into lighter particles even after thermal freeze-out. The re-annihilation of DM provides the observed baryon asymmetry and the correct relic abundance of DM depending on the...
