Matching resummed endpoint and continuum ,[object Object],-ray spectra from dark-matter annihilation
M. Beneke (Physik Department T31, James-Franck-Straße 1, Technische Universität München, D–85748 Garching, Germany); K. Urban (Physik Department T31, James-Franck-Straße 1, Technische Universität München, D–85748 Garching, Germany); M. Vollmann (Institut für Theoretische Physik, Auf der Morgenstelle 14, Eberhard Karls Universität Tübingen, 72076 Tübingen, Germany)
For the minimal wino and Higgsino benchmark models we provide accurate energy spectra of high-energy photons from TeV scale dark-matter annihilation by merging electroweak Sudakov resummation near maximal energy with the electroweak parton-shower PPPC4DM, and accounting for the Sommerfeld effect. Electroweak resummation significantly changes the shape of the photon-energy spectrum in the wide range and hence the form of the so-called “line-signal”.
