Dark matter annihilation into leptons through gravity portals
Sign Up to like & getrecommendations! Published in 2021 at "Journal of High Energy Physics"
DOI: 10.1007/jhep04(2021)108
Abstract: Dark matter (DM) constitutes 85% of the matter in the Universe. However, its specific particle property is still unclear. The fundamentals of DM particles subject to gravitational interaction, and that the lepton excess in cosmic… read more here.
Keywords: gravity portals; dark matter; matter annihilation; matter ... See more keywords
Revisiting CMB constraints on dark matter annihilation
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2021/12/015
Abstract: The precision measurements of the cosmic microwave background power spectrum put a strong constraint on the dark matter annihilation cross section since the electromagnetic energy injection by the dark matter annihilation affects the ionization history… read more here.
Keywords: matter; dark matter; revisiting cmb; matter annihilation ... See more keywords
Searching for velocity-dependent dark matter annihilation signals from extragalactic halos
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2022/09/026
Abstract: We consider gamma-ray signals of dark matter annihilation in extragalactic halos in the case where dark matter annihilates from a p-wave or d-wave state. In these scenarios, signals from extragalactic halos are enhanced relative to… read more here.
Keywords: extragalactic halos; matter annihilation; halos; dark matter ... See more keywords
Impact of QCD uncertainties on antiproton spectra from dark-matter annihilation
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2023/04/068
Abstract: Dark-matter particles that annihilate or decay can undergo complex sequences of processes, including strong and electromagnetic radiation, hadronisation, and hadron decays, before particles that are stable on astrophysical time scales are produced. Antiprotons produced in… read more here.
Keywords: qcd uncertainties; matter annihilation; impact qcd; dark matter ... See more keywords
Radio constraints on dark matter annihilation in Canes Venatici I with LOFAR†
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa1657
Abstract: Dwarf galaxies are dark matter-dominated and therefore promising targets for the search for weakly interacting massive particles (WIMPs), which are well-known candidates for dark matter. Annihilation of WIMPs produce ultra-relativistic cosmic-ray electrons and positrons that… read more here.
Keywords: annihilation; dark matter; matter annihilation; radio ... See more keywords
Robust method for treating astrophysical mismodeling in dark matter annihilation searches of dwarf spheroidal galaxies
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review D"
DOI: 10.1103/physrevd.101.043017
Abstract: Fermi-LAT observations have strongly constrained dark matter annihilation through the joint-likelihood analysis of dwarf spheroidal galaxies (dSphs). These constraints are expected to be robust because dSphs have measurable dark matter content and produce negligible astrophysical… read more here.
Keywords: dark matter; matter annihilation; dwarf spheroidal; matter ... See more keywords
Constraints on dark matter annihilation from the FAST observation of the Coma Berenices dwarf galaxy
Sign Up to like & getrecommendations! Published in 2022 at "Physical Review D"
DOI: 10.1103/physrevd.107.103011
Abstract: The Galactic center $\gamma$-ray excess, detected by the Fermi-LAT, is a very attractive tentative signal from dark matter annihilation. Searching for associated synchrotron emissions can test the dark matter interpretation for this excess. We geared… read more here.
Keywords: matter; dark matter; coma berenices; matter annihilation ... See more keywords
One-loop correction to heavy dark matter annihilation
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review D"
DOI: 10.1103/physrevd.95.055001
Abstract: We calculate the one-loop corrections to TeV scale dark matter annihilation in a model where the dark matter is described by an SU(2)$_L$ triplet of Majorana fermions, such as the wino. We use this framework… read more here.
Keywords: one loop; matter; dark matter; matter annihilation ... See more keywords
Possible Dark Matter Annihilation Signal in the AMS-02 Antiproton Data.
Sign Up to like & getrecommendations! Published in 2017 at "Physical review letters"
DOI: 10.1103/physrevlett.118.191101
Abstract: Using the latest AMS-02 cosmic-ray antiproton flux data, we search for a potential dark matter annihilation signal. The background parameters about the propagation, source injection, and solar modulation are not assumed a priori but based on… read more here.
Keywords: annihilation signal; possible dark; matter; dark matter ... See more keywords