TY  - JOUR
AU  - Sandner, S.
AU  - Hernandez, P.
AU  - Lopez-Pavon, J.
AU  - Rius, N.
PY  - 2023
DA  - 2023//
TI  - Predicting the baryon asymmetry with degenerate right-handed neutrinos
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 153
EP  - 37pp
VL  - 11
IS  - 11
PB  - Springer
KW  - Baryo-and Leptogenesis
KW  - Sterile or Heavy Neutrinos
KW  - Early Universe Particle Physics
AB  - We consider the generation of a baryon asymmetry in an extension of the Standard Model with two singlet Majorana fermions that are degenerate above the electroweak phase transition. The model can explain neutrino masses as well as the observed matter-antimatter asymmetry, for masses of the heavy singlets below the electroweak scale. The only physical CP violating phases in the model are those in the PMNS mixing matrix, i.e. the Dirac phase and a Majorana phase that enter light neutrino observables. We present an accurate analytic approximation for the baryon asymmetry in terms of CP flavour invariants, and derive the correlations with neutrino observables. We demonstrate that the measurement of CP violation in neutrino oscillations as well as the mixings of the heavy neutral leptons with the electron, muon and tau flavours suffice to pin down the matter-antimatter asymmetry from laboratory measurements.
SN  - 1029-8479
UR  - https://arxiv.org/abs/2305.14427
UR  - https://doi.org/10.1007/JHEP11(2023)153
DO  - 10.1007/JHEP11(2023)153
LA  - English
N1  - WOS:001111979900002
ID  - Sandner_etal2023
ER  -