Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-02-02
JHEP 0708:075,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
26 pages, 2 figures. Added references, new appendix of a relevant fit and improved comments
Scientific paper
10.1088/1126-6708/2007/08/075
Motivated by the fact that, in some realistic models combining SO(10) GUTs and flavour symmetries, it is not possible to achieve the required baryon asymmetry through the CP asymmetry generated in the decay of right-handed neutrinos, we take a fresh look on how deep this connection is in SO(10). The common characteristics of these models are that they use the see-saw with right-handed neutrinos, predict a normal hierarchy of masses for the neutrinos observed in oscillating experiments and in the basis where the right-handed Majorana mass is diagonal, the charged lepton mixings are tiny. In addition these models link the up-quark Yukawa matrix to the neutrino Yukawa matrix Y^\nu with the special feature of Y^\nu_{11}-> 0 Using this condition, we find that the required baryon asymmetry of the Universe can be explained by the soft leptogenesis using the soft B parameter of the second lightest right-handed neutrino whose mass turns out to be around 10^8 GeV. It is pointed out that a natural way to do so is to use no-scale supergravity where the value of B ~1 GeV is set through gauge-loop corrections.
Chun Eung Jin
Velasco-Sevilla Liliana
No associations
LandOfFree
SO(10) unified models and soft leptogenesis does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with SO(10) unified models and soft leptogenesis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and SO(10) unified models and soft leptogenesis will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-87357