TY  - JOUR
AU  - Racker, J.
AU  - Rius, N.
PY  - 2014
DA  - 2014//
TI  - Helicitogenesis: WIMPy baryogenesis with sterile neutrinos and other realizations
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 163
EP  - 19pp
VL  - 11
IS  - 11
PB  - Springer
KW  - Cosmology of Theories beyond the SM
KW  - Beyond Standard Model
AB  - We propose a mechanism for baryogenesis from particle decays or annihilations that can work at the TeV scale. Some heavy particles annihilate or decay into a heavy sterile neutrino N (with M greater than or similar to 0.5 TeV) and a "light" one nu (with m << 100 GeV), generating an asymmetry among the two helicity degrees of freedom of nu. This asymmetry is partially transferred to Standard Model leptons via fast Yukawa interactions and reprocessed into a baryon asymmetry by the electroweak sphalerons. We illustrate this mechanism in a WIMPy baryogenesis model where the helicity asymmetry is generated in the annihilation of dark matter. This model connects the baryon asymmetry, dark matter, and neutrino masses. Moreover it also complements previous studies on general requirements for baryogenesis from dark matter annihilation. Finally we discuss other possible realizations of this helicitogenesis mechanism.
SN  - 1029-8479
UR  - http://arxiv.org/abs/1406.6105
UR  - https://doi.org/10.1007/JHEP11(2014)163
DO  - 10.1007/JHEP11(2014)163
LA  - English
N1  - WOS:000347909700009
ID  - Racker+Rius2014
ER  -