High-energy cosmic antiparticle excess vs. isotropic gamma-ray background problem in decaying dark matter Universe

Alekseev, V. V.; Belotsky, K. M.; Bogomolov, Yu. V.; Budaev, R. I.; Dunaeva, O. A.; Кириллов, А. А.; Кузнецов, А. В.; Laletin, Maxim; Lukyanov, A. D.; Malakhov, V.; Mayorov, A. G.; Mayorova, M. A.; Okrugin, A. A.; Rodenko, S. A.; Shitova, A. M.

doi:10.1088/1742-6596/675/1/012023

Cited by 8 publications

(9 citation statements)

References 7 publications

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“…In our works [16,[34][35][36][37][38], we have used this fact to propose the so-called "dark disk model" for description the positron anomaly in AMS-02 data. We consider the Dark Matter to consist of two components.…”

Section: Dark Disk Modelmentioning

confidence: 99%

Indirect effects of dark matter

Belotskiy

Esipova

Kamaletdinov

et al. 2019

Int. J. Mod. Phys. D

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Here we briefly review possible indirect effects of dark matter (DM) of the Universe. It includes effects in cosmic rays (CR): first of all, the positron excess at ∼ 500 GeV and possible electron-positron excess at 1-1.5 TeV. We tell that the main and least model-dependent constraint on such possible interpretation of CR effects goes from gamma-ray background. Even ordinary e + e − mode of DM decay or annihilation produces prompt photons (FSR) so much that it leads to contradiction with data on cosmic gamma-rays. We present our attempts to possibly avoid gamma-ray constraint. They concern peculiarities of both space distribution of DM and their physics. The latter involves complications of decay/annihilation modes of DM, modifications of Lagrangian of DM-ordinary matter interaction, and inclusion of mode with identical fermions in final state. In this way, no possibilities to suppress were found yet except, possibly, mode with identical fermions. While the case of spatial distribution variation allows achieving consistency between different data. Also we consider stable form of dark matter which can interact with baryons. We show which constraint such DM candidate can get from damping effect in plasma during large scale structure formation in comparison with other existing constraints.

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Section: Dark Disk Modelmentioning

confidence: 99%

Indirect effects of dark matter

Belotskiy

Esipova

Kamaletdinov

et al. 2019

Int. J. Mod. Phys. D

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“…But attempts to explain the positron anomaly with DM face a problem of agreement with data on cosmic gamma-rays (see, e.g., our works [6,7,8] and other [9,10,11,12,13]) and CMB [14] and some other for specific DM model case. Constraint following from CMB can be more easily avoided (see, e.g., the references in [15,16,17]) than that from data on cosmic gamma-ray background [19].…”

Section: Introductionmentioning

confidence: 68%

Consideration of a loop decay of dark matter particle into electron-positron from point of view of possible FSR suppression

Belotsky,

Kamaletdinov

2020

Preprint

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Cosmic positron anomaly is still not explained. Explanation with dark matter (DM) decay or annihilation is one of the main attempts to do it. But they suffer with shortcoming as overproduction of induced gamma-radiation which contradict to cosmic gamma-background. Final state radiation (FSR) in such processes is supposed under standard conditions (by default) to have the basic contribution in it. Our group elaborates possibility to evade this problem in different ways.Here we continue one of them connected with possibility of suppression of FSR due to specifics of Lagrangian describing DM particle decay. Loop through two new spinors and scalar is considered. Effect of FSR suppression is found to be existing but at the very low level in the considered case.

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“…In our works [1][2][3]5,9] we have shown that the DM models explaining the positron anomaly in most cases have major problems with gamma-ray constraints, more specifically, the one set by IGRB data obtained by Fermi-LAT experiment [12]. And therefore, to make these models plausible, one needs to somehow suppress the gamma-ray emission.…”

Section: Maximal Possible Gamma-ray Radiation From Annihilating Dm Momentioning

confidence: 97%

“…Read's density profile causes a lack of low and mid-energy positrons leading to high values of chi-square even without gamma at all. At higher masses of initial particle it results in absence of solutions for Equation (2), and in that case the closest obtainable value was used. Therefore, the K values obtained for the disk case should be treated with caution.…”

Section: Maximal Possible Gamma-ray Radiation From Annihilating Dm Momentioning

confidence: 99%

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Cosmic Gamma Ray Constraints on the Indirect Effects of Dark Matter

et al. 2020

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The observed anomalous excess of high-energy cosmic ray (CR) positrons is widely discussed as possible indirect evidence for dark matter (DM). However, any source of cosmic positrons is inevitably the source of gamma radiation. The least model dependent test of CR anomalies interpretation via DM particles decays (or annihilation) is connected with gamma-ray background due to gamma overproduction in such processes. In this work, we impose an observational constraint on gamma ray production from DM. Then, we study the possible suppression of gamma yield in the DM decays into identical final fermions. Such DM particles arise in the multi-component dark atom model. The influence of the interaction vertices on the gamma suppression was also considered. No essential gamma suppression effects are found. However, some minor ones are revealed.

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High-energy cosmic antiparticle excess vs. isotropic gamma-ray background problem in decaying dark matter Universe

Cited by 8 publications

References 7 publications

Indirect effects of dark matter

Indirect effects of dark matter

Consideration of a loop decay of dark matter particle into electron-positron from point of view of possible FSR suppression

Cosmic Gamma Ray Constraints on the Indirect Effects of Dark Matter

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