%0 Conference Paper
%A Cavasonza, Leila Ali
%A Krämer, Michael
%A Pellen, Mathieu
%T Electroweak fragmentation functions  for dark matter annihilation
%C Hamburg
%I Verlag Deutsches Elektronen-Synchrotron
%M PUBDB-2016-05905
%@ 978-3-935702-59-1
%B DESY-PROC
%P 33-36
%D 2014
%< Cavasonza, Leila Ali "Electroweak fragmentation functions  for dark matter annihilation" in Proceedings, 10th Patras Workshop on Axions, WIMPs and WISPs (AXION-WIMP 2014)  / Tsesmelis, Emmanuel, Maroudas, Marios (eds.), Verlag Deutsches Elektronen-Synchrotron : 2014 ; AXION-WIMP 2014 : 10th Patras Workshop on Axions, WIMPs and WISPs, 2014-06-29 - 2014-07-04, Geneva
%X Electroweak corrections are relevant for dark matter indirect detection predictions. The quality of the fragmentation function approximation to describe electroweak gauge boson radiation is examined in two concrete models. For models with Majorana fermion dark matter annihilation into light fermions, the fragmentation function approximation does not work, due to the helicity suppression of the lowest-order cross section. For other models, like those with vector dark matter, fragmentation functions provide very reliable results for dark matter with masses M<sub>DM</sub>  >~500 GeV.
%B 10th Patras Workshop on Axions, WIMPs and WISPs
%C 29 Jun 2014 - 4 Jul 2014, Geneva (Switzerland)
Y2 29 Jun 2014 - 4 Jul 2014
M2 Geneva, Switzerland
%F PUB:(DE-HGF)8 ; PUB:(DE-HGF)7
%9 Contribution to a conference proceedingsContribution to a book
%R 10.3204/DESY-PROC-2014-03/kraemer_michael
%U https://bib-pubdb1.desy.de/record/315498