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

Recent results from several direct detection experiments have imposed severeconstraints on the multi-GeV mass window for various dark matter (DM) models.However, many of these experiments are not sensitive to MeV scale DM as thecorresponding recoil energies are, largely, lower than the detector thresholds.We reexamine the light scalar DM in a model-independent approach. In this firstof a two-part work, we develop an appropriate methodology to determine theeffective coupling of such a DM to hadrons, thereby allowing for thedetermination of the corresponding annihilation rates. We find that while theparameter space can be constrained using cosmological and astrophysicalobservations, a significantly large fraction is still viable. In the companionpaper, we study the sensitivity of both direct detection experiments as well ascolliders to such a DM.

Model Independent analysis of MeV scale dark matter: I. Cosmological constraints