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for search: '"511"'
Author/Creator:
Feng, Wan-Zhe, Zhang, Zi-Hui
The galactic 511~keV photon signal can be fully explained by the decaying dark matter generated through the freeze-in mechanism. The explanation of the 511~keV signal requires an extremely tiny coupling between the decaying dark matter and $e^+e^-$ p
Externí odkaz:
http://arxiv.org/abs/2405.19431
Author/Creator:
Nizamov, B. A., Pshirkov, M. S.
The origin of the diffuse gamma-ray background in the range from hundreds keV to several MeV is not known conclusively. From current models and observations it is believed that, at least partially, this background is formed by blazars and remnants of
Externí odkaz:
http://arxiv.org/abs/2403.08427
Author/Creator:
Chyzh, Roman, Tauzin, Gerard, Yvon, Dominique, Sung, Chi-Hsun, Breton, Dominique, Maalmi, Jihane, Schäfers, Klaus, Weinheimer, Christian, Sharyy, Viatcheslav
In the present work we describe the design, construction, and testing of the optical prototype developed for the BOLDPET project, with the objective of creating a PET detection module with high spatial and time resolution. The BOLDPET technology uses
Externí odkaz:
http://arxiv.org/abs/2401.17003
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
Published in:
JCAP 11 (2023) 003
We study the morphology of the 511 keV signal that could be produced by exciting dark matter (XDM) in the Milky Way. In this model, collisions between dark matter particles excite the dark matter to a state that can then decay back to the ground stat
Externí odkaz:
http://arxiv.org/abs/2307.15114
Author/Creator:
Domurat-Sousa, Kepler, Poe, Cameron, Frisch, Henry J., Adams, Bernhard W., Ertley, Camden, Sullivan, Neal
Published in:
Nucl. Instrum. Meth. Vol. 1055 (Oct 2023) 168538
We have used the TOPAS simulation framework to model the direct conversion of 511 keV gamma rays to electrons in a micro-channel plate (MCP) constructed from thin laminae of a heavy-metal-loaded dielectric such as lead-glass, patterned with micro-cha
Externí odkaz:
http://arxiv.org/abs/2306.11701
Author/Creator:
Ola Harstad
Published in:
Norsk Litteraturvitenskapelig Tidsskrift, Vol 27, Iss 1, Pp 46-51 (2024)
Externí odkaz:
https://doaj.org/article/e20eaa4312824e6abc0a0366016c41ec
Author/Creator:
Nizamov, B. A., Pshirkov, M. S.
Positron annihilation line at 511~keV is a known component of the gamma-ray diffuse emission. It is believed to be produced in the Galaxy, but there could be possible extragalactic contribution as well. E.g., positrons can be produced in jets of acti
Externí odkaz:
http://arxiv.org/abs/2303.03526
Author/Creator:
Bonert, Michael1 (AUTHOR) bonertm@mcmaster.ca, Berzins, Alison1 (AUTHOR), Begum, Housne2 (AUTHOR), Schittenhelm, Jens3 (AUTHOR), Lu, Jian-Qiang4 (AUTHOR), Juergens, Rosalyn A.5 (AUTHOR), Swaminath, Anand6 (AUTHOR), Cutz, Jean-Claude1 (AUTHOR), Naqvi, Asghar H.1 (AUTHOR)
Published in:
PLoS ONE. 11/9/2023, Vol. 18 Issue 11, p1-12. 12p.