Analysis of a possible explanation of the positron anomaly in terms of dark matter


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The possibility of explaining the positron anomaly on the basis of models involving the darkmatter annihilation or decay is being widely discussed at the present time. However, such models are severely constrained by data on cosmic gamma radiation. Two different procedures that rely on the χ2 criterion and which permit taking this constraint into account are considered in the present study. In one case, the use of positron data alone in searches for a minimum value of χ2 via varying model parameters is followed by a comparison with gamma-radiation data. In the second case, the χ2 functional is minimized by simultaneously employing positron and gamma-radiation data, whereby a more lenient (more “flexible”) constraint is obtained. Nevertheless, either procedure rules out the possibility of explaining the positron anomaly in terms of unstable dark matter distributed over the whole halo. The assumption that the dark-matter component undergoing annihilation (decay) is concentrated within the galactic disk makes it possible to remove the constraint in either case.

Sobre autores

V. Alekseev

Demidov Yaroslavl State University

Email: buday48@mail.ru
Rússia, Sovetskaya ul. 14, Yaroslavl, 150000

K. Belotsky

National Research Nuclear University MEPhI

Email: buday48@mail.ru
Rússia, Kashirskoe sh. 31, Moscow, 115409

Yu. Bogomolov

Demidov Yaroslavl State University

Email: buday48@mail.ru
Rússia, Sovetskaya ul. 14, Yaroslavl, 150000

R. Budaev

National Research Nuclear University MEPhI

Autor responsável pela correspondência
Email: buday48@mail.ru
Rússia, Kashirskoe sh. 31, Moscow, 115409

O. Dunaeva

Demidov Yaroslavl State University

Email: buday48@mail.ru
Rússia, Sovetskaya ul. 14, Yaroslavl, 150000

A. Kirillov

Demidov Yaroslavl State University; National Research Nuclear University MEPhI

Email: buday48@mail.ru
Rússia, Sovetskaya ul. 14, Yaroslavl, 150000; Kashirskoe sh. 31, Moscow, 115409

A. Kuznetsov

Demidov Yaroslavl State University

Email: buday48@mail.ru
Rússia, Sovetskaya ul. 14, Yaroslavl, 150000

A. Lukyanov

Demidov Yaroslavl State University

Email: buday48@mail.ru
Rússia, Sovetskaya ul. 14, Yaroslavl, 150000

V. Malakhov

National Research Nuclear University MEPhI

Email: buday48@mail.ru
Rússia, Kashirskoe sh. 31, Moscow, 115409

A. Mayorov

Demidov Yaroslavl State University; National Research Nuclear University MEPhI

Email: buday48@mail.ru
Rússia, Sovetskaya ul. 14, Yaroslavl, 150000; Kashirskoe sh. 31, Moscow, 115409

M. Mayorova

National Research Nuclear University MEPhI

Email: buday48@mail.ru
Rússia, Kashirskoe sh. 31, Moscow, 115409

A. Mosichkin

Demidov Yaroslavl State University

Email: buday48@mail.ru
Rússia, Sovetskaya ul. 14, Yaroslavl, 150000

A. Okrugin

Demidov Yaroslavl State University

Email: buday48@mail.ru
Rússia, Sovetskaya ul. 14, Yaroslavl, 150000

S. Rodenko

National Research Nuclear University MEPhI

Email: buday48@mail.ru
Rússia, Kashirskoe sh. 31, Moscow, 115409

A. Shitova

Demidov Yaroslavl State University

Email: buday48@mail.ru
Rússia, Sovetskaya ul. 14, Yaroslavl, 150000

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