TY - JOUR

T1 - Baryon-like Space Distribution of Dark Matter from Point of View of Explanation of Positron Anomaly

AU - Belotsky, Konstantin M.

AU - Solovev, Maksim L.

N1 - Belotsky, K. M. Baryon-like Space Distribution of Dark Matter from Point of View of Explanation of Positron Anomaly / K. M. Belotsky, M. L. Solovev // Particles. – 2026. – Vol. 9, No. 1. – P. 15. – DOI 10.3390/particles9010015. – EDN DMESYZ. This research was funded by Russian Science Foundation grant no. 24-22-00325 “Search for an explanation of the positron anomaly in cosmic rays by means of dark matter”

PY - 2026/2/13

Y1 - 2026/2/13

N2 - In this work we test the possibility of accounting for the positron anomaly with annihilating dark matter particles without contradicting the gamma-ray constraints due to their unconventional space distribution. To achieve that, we consider two-component dark matter, whose major constituent is inert and forms the halo of the Galaxy, while the second, minor, component consists of annihilating particles that could form some different structure. This work is the next logical step after our previous “dark disk model” where an active DM component was considered to form a disk, allowing good suppression of accompanying gamma-radiation. Nowadays that model is not enough to avoid the contradiction, so we are testing a new, more complex one with a spiral spatial distribution like the one of baryons. We have previously tested two simplified toy models of ring-like density profiles and one simple spiral density profile that have shown good improvement compared to the disk case. In this work, we take things further and consider a more physically grounded density profile constructed on the base of a modern model of the baryon density of our Galaxy. Contrary to our expectations, this advanced model shows much worse agreement with the data than previous toy models.

AB - In this work we test the possibility of accounting for the positron anomaly with annihilating dark matter particles without contradicting the gamma-ray constraints due to their unconventional space distribution. To achieve that, we consider two-component dark matter, whose major constituent is inert and forms the halo of the Galaxy, while the second, minor, component consists of annihilating particles that could form some different structure. This work is the next logical step after our previous “dark disk model” where an active DM component was considered to form a disk, allowing good suppression of accompanying gamma-radiation. Nowadays that model is not enough to avoid the contradiction, so we are testing a new, more complex one with a spiral spatial distribution like the one of baryons. We have previously tested two simplified toy models of ring-like density profiles and one simple spiral density profile that have shown good improvement compared to the disk case. In this work, we take things further and consider a more physically grounded density profile constructed on the base of a modern model of the baryon density of our Galaxy. Contrary to our expectations, this advanced model shows much worse agreement with the data than previous toy models.

KW - cosmic rays

KW - dark matter

KW - density profile

KW - gamma-rays

KW - positron anomaly

KW - тёмная материя

KW - позитронная аномалия

KW - космические лучи

KW - гамма-лучи

KW - профиль плотности

UR - https://www.mendeley.com/catalogue/ec7ebfd3-6bc4-36e1-9ffb-24833daec79d/

UR - https://www.scopus.com/pages/publications/105034067890

UR - https://elibrary.ru/item.asp?id=89741220

U2 - 10.3390/particles9010015

DO - 10.3390/particles9010015

M3 - Article

VL - 9

JO - Particles

JF - Particles

SN - 2571-712X

IS - 1

M1 - 15

ER -