English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Dark disk model could be a remedy for dark matter (DM) explanation ofpositron anomaly (PA) in cosmic rays (CR). The main difficulty in PAexplanation relates to cosmic gamma-radiation which is inevitably produced inDM annihilation or decay leading to tension with respective observation data.Introduction of "active" (producing CR) DM component concentrating in galacticdisk alleviates this tension. Earlier we considered two-lepton modes, withbranching ratios being chosen to fit in the best way all the observation data.Here we considered, in framework of the same dark disk model, two cases:two-body final state annihilation and four-body one, and in each case a quarkmode is added to the leptonic ones. It is shown that 4-body mode case is alittle better than 2-body one from viewpoint of quality of observation datadescription at the fixed all other parameters (of CR propagation, background,disk height). The values of DM particle mass around 350 GeV and 500 GeV aremore favourable for 2- and 4-body modes respectively. Higher values wouldimprove description of data on positrons only but accounting for data ongamma-radiation prevents it because of unwanted more abundant high-energy gammaproduction. Inclusion of the quark modes improves a little fitting data in both4- and 2-body mode cases, contrary to naive expectations. In fact, quark modehas a bigger gammas yield than that of most gamma-productive leptonic mode~---tau, but they are softer due to bigger final state hadron multiplicity.

Development of dark disk model of positron anomaly origin