Interpretation of the Galactic gamma-ray excess with the dark matter indicated by <sup>8</sup>Be and <sup>4</sup>He anomalous transitions *

Jia, Lingpu; Li, Tong

doi:10.1088/1674-1137/abeda6

Cited by 2 publications

(1 citation statement)

References 88 publications

(115 reference statements)

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“…included) can be obtained using the relation cm / [33,34]. The annihilation of is suppressed by the factor in observations, and revised annihilation cross section is shown in Fig.…”

Section: Boosted Dm For the Xenon1t Excessmentioning

confidence: 99%

Interpretation of XENON1T excess with MeV boosted dark matter *

Jia

2022

Chinese Phys. C

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The XENON1T excess of keV electron recoil events may be induced by the scattering of electrons and long-lived particles with MeV mass and high-speed. We consider a tangible model composed of two scalar MeV dark matter (DM) particles $S_A$ and $S_B$ to interpret the XENON1T keV excess via boosted $S_B$. A small mass splitting $m_{S_A}-m_{S_B}>0$ is introduced and the boosted $S_B$ can be produced by the dark annihilation process of $S_A S_A^\dagger \to \phi \to S_B S_B^\dagger$ via a resonant scalar $\phi$. The $S_B-$electron scattering is intermediated by a vector boson $X$. Although the constraints from BBN, CMB and low-energy experiments set the $X-$mediated $S_B-$electron scattering cross section to be $\lesssim 10^{-35} \mathrm{cm}^2$, the MeV scale DM with a resonance enhanced dark annihilation today can still provide enough boosted $S_B$ and induce the XENON1T keV excess. The relic density of $S_B$ is significantly reduced by the $s$-wave process of $S_B S_B^\dagger \to X X$ which is allowed by the constraints from CMB and 21-cm absorption. A very small relic fraction of $S_B$ is compatible with the stringent bounds on un-boosted $S_B$-electron scattering in DM direct detection and the $S_A$-electron scattering is also allowed. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.

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“…included) can be obtained using the relation cm / [33,34]. The annihilation of is suppressed by the factor in observations, and revised annihilation cross section is shown in Fig.…”

Section: Boosted Dm For the Xenon1t Excessmentioning

confidence: 99%

Interpretation of XENON1T excess with MeV boosted dark matter *

Jia

2022

Chinese Phys. C

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Singlet scalar dark matter in the noncommutative space–time: A viable hypothesis to explain the gamma-ray excess in the galactic center

Rezaei,

Zakeri

2023

Int. J. Mod. Phys. A

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In this paper, we explore the noncommutative space–time to revive the idea that gamma-ray excess in the galactic center may stem from the annihilation of particle dark matter. In the noncommutative theory, the photon spectrum is produced by direct emission during this annihilation wherein a photon can be embed in the final state together with other direct products in new vertices. In the various configurations of dark matter phenomenology, we pursue the most prevalent model known as singlet scalar. Calculating the relevant aspects of the model and determining the parameters phase space, we derive the photon flux in the galactic center. This region, known for its high density and occasional existence of robust magnetic fields, serves as an ideal location for investigating theories that encompass the concept of Lorentz symmetry breaking. Upon comparing our numerical achievements with experimental data, it becomes evident that noncommutative space–time can be a reliable framework to explain the gamma-ray excess.

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Interpretation of the Galactic gamma-ray excess with the dark matter indicated by ⁸Be and ⁴He anomalous transitions *

Cited by 2 publications

References 88 publications

Interpretation of XENON1T excess with MeV boosted dark matter *

Interpretation of XENON1T excess with MeV boosted dark matter *

Singlet scalar dark matter in the noncommutative space–time: A viable hypothesis to explain the gamma-ray excess in the galactic center

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Interpretation of the Galactic gamma-ray excess with the dark matter indicated by 8Be and 4He anomalous transitions *

Cited by 2 publications

References 88 publications

Interpretation of XENON1T excess with MeV boosted dark matter *

Interpretation of XENON1T excess with MeV boosted dark matter *

Singlet scalar dark matter in the noncommutative space–time: A viable hypothesis to explain the gamma-ray excess in the galactic center

Contact Info

Product

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Interpretation of the Galactic gamma-ray excess with the dark matter indicated by ⁸Be and ⁴He anomalous transitions *