Zobrazeno 1 - 10
of 71
pro vyhledávání: '"Luque, P. de la Torre"'
We demonstrate that the anomalous ionization rate observed in the Central Molecular Zone can be attributed to MeV dark matter annihilations into $e^+e^-$ pairs for galactic dark matter profiles with slopes $\gamma>1$. The low annihilation cross-secti
Externí odkaz:
http://arxiv.org/abs/2409.07515
Autor:
Luque, Pedro De La Torre, Linden, Tim
The height of the Milky Way diffusion halo, above which cosmic-rays can freely escape the galaxy, is among the most critical, yet poorly known, parameters in cosmic-ray physics. Measurements of radioactive secondaries, such as $^{10}$Be or $^{26}$Al,
Externí odkaz:
http://arxiv.org/abs/2408.05179
We revisit the role of primordial black holes (PBHs) as potential dark matter (DM) candidates, particularly focusing on light asteroid-mass PBHs. These PBHs are expected to emit particles through Hawking evaporation that can generate cosmic rays (CRs
Externí odkaz:
http://arxiv.org/abs/2406.11949
Several extensions of the Standard Model predict the existence of sub-GeV particles that can be copiously produced in the cores of supernovae. A broad family of these particles are dubbed feebly interacting particles (FIPs), which can have masses of
Externí odkaz:
http://arxiv.org/abs/2406.07316
Recent $\gamma$-ray and neutrino observations seem to favor the consideration of non-uniform diffusion of cosmic rays (CRs) throughout the Galaxy. In this study, we investigate the consequences of spatially-dependent inhomogeneous propagation of CRs
Externí odkaz:
http://arxiv.org/abs/2405.12918
The $\gamma$ ray emission originating from in-flight annihilation (IA) of positrons is a powerful observable for constraining high-energy positron production from exotic sources. By comparing diffuse $\gamma$ ray observations of INTEGRAL, COMPTEL and
Externí odkaz:
http://arxiv.org/abs/2405.08482
Tentative observations of cosmic-ray antihelium by the AMS-02 collaboration have re-energized the quest to use antinuclei to search for physics beyond the standard model. However, our transition to a data-driven era requires more accurate models of t
Externí odkaz:
http://arxiv.org/abs/2404.13114
Autor:
Rocamora, Manuel, Ascasibar, Yago, Sánchez-Conde, Miguel A., Wechakama, Maneenate, Luque, Pedro de la Torre
We study the origin of the positron excess observed in the local cosmic-ray spectrum at high energies, and relate it to the cosmic rays and gamma-ray emission across the entire Galaxy. In particular, we explore the hypothesis of a single, dominant so
Externí odkaz:
http://arxiv.org/abs/2403.03303
Early studies of the AMS-02 antiproton ratio identified a possible excess over the expected astrophysical background that could be fit by the annihilation of a weakly interacting massive particle (WIMP). However, recent efforts have shown that uncert
Externí odkaz:
http://arxiv.org/abs/2401.10329
We explore the $511$~keV emission associated to sub-GeV dark matter (DM) particles that can produce electron-positron pairs and form positronium after thermalizing. We use $\sim16$~yr of SPI data from INTEGRAL to constrain DM properties, considering
Externí odkaz:
http://arxiv.org/abs/2312.04907