901 citations · 6.6k across the 67 of their papers we have counts for
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hep-ph2010★ 130 cited
Relic densities including Sommerfeld enhancements in the MSSM
Andrzej Hryczuk, Roberto Iengo, Piero Ullio
We have developed a general formalism to compute Sommerfeld enhancement (SE) factors for a multi-state system of fermions, in all possible spin configurations and with generic long…
astro-ph.HE2010★ 17 cited
Multi-wavelength Searches for Particle Dark Matter
Stefano Profumo, Piero Ullio
If dark matter particles pair annihilate into stable Standard Model particles, a population of energetic, non-thermal electrons and positrons is necessarily produced. The secondary…