Sudakov resummation for WIMP dark matter annihilation

by Alessandro Broggio

Wednesday 17 Oct 2018, 11:00 → 12:00 Europe/Zurich

Edificio U2, Aula 5017 (Dipartimento di Fisica G. Occhialini, U2, Università degli Studi di Milano-Bicocca)

The annihilation cross section of TeV scale dark matter particles X0 with electroweak charges into photons is affected by large quantum corrections due to Sudakov logarithms and the Sommerfeld effect. I present the semi-inclusive photon energy spectrum in X0 X0 → γ + X in the vicinity of the maximal photon energy Eγ = mX with NLL’ accuracy adopting the pure wino model. This results in the most precise theoretical prediction of the annihilation rate for γ-ray telescopes with photon energy resolution of parametric order m^2_W /mX for photons with TeV energies.