A. Powell

activity

20082016

most citedSearch for Light CP-odd Higgs in Radiative Decays of Upsilon(1S)

86 citations · 341 across the 8 of their papers we have counts for

collaborators

Showing 2014Show all

2 papers · 1 filter

astro-ph.CO2014★ 14 cited

A Cosmic ALP Background and the Cluster Soft X-ray Excess in A665, A2199 and A2255

Andrew J. Powell

It has been proposed that an excess in soft X-ray emission observed from many galaxy clusters can be explained by conversion into photons of axion-like particles (ALPs) in the clus…

hep-ph2014★ 34 cited

A 3.55 keV line from $DM \to a \to γ$ : predictions for cool-core and non-cool-core clusters

Joseph P. Conlon, Andrew J. Powell

We further study a scenario in which a 3.55 keV X-ray line arises from decay of dark matter to an axion-like particle (ALP), that subsequently converts to a photon in astrophysical…

A Cosmic ALP Background and the Cluster Soft X-ray Excess in A665, A2199 and A2255

A 3.55 keV line from DM→a→γ: predictions for cool-core and non-cool-core clusters

A 3.55 keV line from $DM \to a \to γ$ : predictions for cool-core and non-cool-core clusters